CN113301668B - E1 point-to-point communication method, terminal and system by means of wireless network - Google Patents
E1 point-to-point communication method, terminal and system by means of wireless network Download PDFInfo
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- CN113301668B CN113301668B CN202110517612.8A CN202110517612A CN113301668B CN 113301668 B CN113301668 B CN 113301668B CN 202110517612 A CN202110517612 A CN 202110517612A CN 113301668 B CN113301668 B CN 113301668B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W76/10—Connection setup
- H04W76/12—Setup of transport tunnels
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- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a method, a terminal and a system for E1 point-to-point communication by means of a wireless network, wherein a first path of E1 message forwarded by a first CPE is received in a public network; forwarding the first path E1 message to a corresponding second CPE according to a preset E1 path forwarding table, and sending the first path E1 message to a corresponding second path E1 through the second CPE; e1 message is sent through CPE and forwarded through public network, because CPE is the equipment which converts high-speed 4G or 5G signal into WiFi signal or wired network signal, the point-to-point communication of E1 message through wireless network can be realized, the point-to-point communication of E1 can be realized only in the place covered by wireless signal, the service is convenient to spread, 4G network or 5G network can be used to replace PSN to transmit E1 service, and the maintenance cost is low.
Description
The scheme is a divisional application taking a patent application with application number of 201910636253.0, application date of 2019, 7 month and 15 days and name of E1 point-to-point communication method, terminal and system as a master application.
Technical Field
The present invention relates to the field of mobile communications, and in particular, to a method, terminal, and system for E1 peer-to-peer communications with the help of a wireless network.
Background
In 1999, RAD corporation first brought TDM over IP technology to the market. The TDM over IP technology can provide the transmission of circuit services such as E1 or T1 on the IP network, and compared with the traditional telecommunication network, the TDM over IP technology fully exerts the bandwidth and cost advantages of the data network, and provides a simple and low-cost transition scheme for converting the traditional telecommunication network into the full IP network for a service provider.
TDM (time division multiplexing) circuit emulation gateway equipment is a product developed based on TDM over IP technology, and the equipment generally has multiple paths of E1 interfaces, is deployed at the edge of a TDM network and a PSN (packet switched network) network, and is based on PSN to realize the interworking application of the traditional TDM equipment, and E1 services are transparently uploaded on the PSN packet switched network such as IP, ethernet and MPLS network (as shown in figure 1). However, these conventional applications have a limited network environment, and only use a wired network, so that the maintenance cost is high, and the configuration of the two-end gateway device must be modified accordingly once the network environment or the connection requirement changes.
At present, the coverage rate of the 4G network in China is up to more than 95%, the lower network delay and the network rate of a high peak value can also meet the requirement of the TDM circuit simulation gateway equipment intercommunication service, so that the use of the 4G network to replace PSN to transmit E1 service becomes possible, but no effective and convenient mode is available at present to realize the 4G network to transmit E1 service, thereby realizing the transmission of E1 service by means of a wireless network.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: a method, a terminal and a system for E1 point-to-point communication by means of a wireless network are provided, which can transmit E1 service by means of the wireless network, and facilitate the expansion of the E1 service.
In order to solve the technical problems, the invention adopts a technical scheme that:
a method of E1 point-to-point communication by means of a wireless network, comprising the steps of:
s1, receiving a first path E1 message forwarded by a first CPE in a public network;
s2, forwarding the first path E1 message to a corresponding second CPE according to a preset E1 path forwarding table, and sending the first path E1 message to the corresponding second path E1 through the second CPE.
In order to solve the technical problems, the invention adopts another technical scheme that:
a terminal for E1 point-to-point communication by means of a wireless network, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program:
s1, receiving a first path E1 message forwarded by a first CPE in a public network;
s2, forwarding the first path E1 message to a corresponding second CPE according to a preset E1 path forwarding table, and sending the first path E1 message to the corresponding second path E1 through the second CPE.
In order to solve the technical problems, the invention adopts another technical scheme that:
a system for E1 point-to-point communication by means of a wireless network, comprising a first CPE, a second CPE and a forwarding server, said forwarding server being wirelessly connected to said first CPE and second CPE, respectively;
the forwarding server is arranged in the public network;
the first CPE is used for sending a first path E1 message to the forwarding server;
the forwarding server is configured to forward the first path E1 message to the second CPE according to a preset E1 path forwarding table;
the second CPE is configured to send the first path E1 message to a corresponding second path E1.
The invention has the beneficial effects that: e1 message is sent through CPE and forwarded through public network, because CPE is the equipment which converts high-speed 4G or 5G signal into WiFi signal or wired network signal, the point-to-point communication of E1 message through wireless network can be realized, the point-to-point communication of E1 can be realized only in the place covered by wireless signal, the service is convenient to spread, 4G network or 5G network can be used to replace PSN to transmit E1 service, and the maintenance cost is low.
Drawings
Fig. 1 is a schematic structural diagram of a system for transparent transmission of E1 traffic through a PSN packet switched network in the prior art;
FIG. 2 is a flow chart of steps of a method of E1 peer-to-peer communication according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a terminal for E1 peer-to-peer communication according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a system for E1 peer-to-peer communication according to an embodiment of the present invention;
description of the reference numerals:
1. an E1 point-to-point communication terminal; 2. a memory; 3. a processor.
Detailed Description
In order to describe the technical contents, the achieved objects and effects of the present invention in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.
Noun interpretation:
e1: the European 30-channel pulse code modulation PCM is called E1 for short, the rate is 2.048Mbit/s, and 30 voice channels and 2 control channels are combined on a high-speed channel of 2.048Mbit/s by adopting a synchronous time division multiplexing technology;
CPE: customer Premise Equipment A mobile signal access device which receives mobile signals and forwards them as wireless WIFI signals or wired network signals is also a device which converts high-speed 4G or 5G signals into WiFi signals or wired network signals.
Referring to fig. 2, a method for E1 peer-to-peer communication by a wireless network includes the steps of:
s1, receiving a first path E1 message forwarded by a first CPE in a public network;
s2, forwarding the first path E1 message to a corresponding second CPE according to a preset E1 path forwarding table, and sending the first path E1 message to the corresponding second path E1 through the second CPE.
From the above description, the beneficial effects of the invention are as follows: e1 message is sent through CPE and forwarded through public network, because CPE is the equipment which converts high-speed 4G or 5G signal into WiFi signal or wired network signal, the point-to-point communication of E1 message through wireless network can be realized, the point-to-point communication of E1 can be realized only in the place covered by wireless signal, the service is convenient to spread, 4G network or 5G network can be used to replace PSN to transmit E1 service, and the maintenance cost is low.
Further, the step S1 includes the following steps:
receiving source MAC information and E1 channel information of a message which is sent by the first CPE and is determined according to the first channel E1 message in a public network;
inquiring the preset E1 path forwarding table according to the source MAC information and the E1 path information of the message, determining whether a corresponding matching item is inquired, if so, establishing a forwarding tunnel, and sending a message of successful establishment of the forwarding tunnel to the first CPE, so that the first CPE forwards the first path E1 message according to the message of successful establishment of the forwarding tunnel.
The above description shows that, before forwarding the message, it is determined whether the forwarding tunnel is successfully established, and the message is forwarded on the premise of successful establishment, so that the reliability and effectiveness of forwarding the message are ensured.
Further, the original message header in the first path E1 message received in the step S1 is replaced by a first tunnel header by the first CPE, where the first tunnel header includes a MAC and an E1 path number of a gateway connected to the first CPE;
the step S2 includes:
searching a preset E1 path forwarding table according to the first tunnel header information, finding out a corresponding destination gateway MAC and a corresponding destination E1 path number, generating a second tunnel header according to the destination gateway MAC and the destination E1 path number, replacing the first tunnel header with the second tunnel header, forwarding a first path E1 message packaged with the second tunnel header to a second CPE corresponding to the destination gateway, enabling the second CPE to regenerate a second message header corresponding to an original message header according to the second tunnel header, replacing the second tunnel header with the second message header, and sending the first path E1 message packaged with the second message header to the corresponding second path E1.
According to the description, the corresponding target E1 path is queried according to the E1 path forwarding table, so that the smoothness of point-to-point communication of the E1 message is ensured, and the method is simple, flexible and quick.
Referring to fig. 3, a terminal for E1 peer-to-peer communication includes a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor implements the following steps when executing the computer program:
s1, receiving a first path E1 message forwarded by a first CPE in a public network;
s2, forwarding the first path E1 message to a corresponding second CPE according to a preset E1 path forwarding table, and sending the first path E1 message to the corresponding second path E1 through the second CPE.
From the above description, the beneficial effects of the invention are as follows: e1 message is sent through CPE and forwarded through public network, because CPE is the equipment which converts high-speed 4G or 5G signal into WiFi signal or wired network signal, the point-to-point communication of E1 message through wireless network can be realized, the point-to-point communication of E1 can be realized only in the place covered by wireless signal, the service is convenient to spread, 4G network or 5G network can be used to replace PSN to transmit E1 service, and the maintenance cost is low.
Further, the step S1 includes the following steps:
receiving source MAC information and E1 channel information of a message which is sent by the first CPE and is determined according to the first channel E1 message in a public network;
inquiring the preset E1 path forwarding table according to the source MAC information and the E1 path information of the message, determining whether a corresponding matching item is inquired, if so, establishing a forwarding tunnel, and sending a message of successful establishment of the forwarding tunnel to the first CPE, so that the first CPE forwards the first path E1 message according to the message of successful establishment of the forwarding tunnel.
The above description shows that, before forwarding the message, it is determined whether the forwarding tunnel is successfully established, and the message is forwarded on the premise of successful establishment, so that the reliability and effectiveness of forwarding the message are ensured.
Further, the original message header in the first path E1 message received in the step S1 is replaced by a first tunnel header by the first CPE, where the first tunnel header includes a MAC and an E1 path number of a gateway connected to the first CPE;
the step S2 includes:
searching a preset E1 path forwarding table according to the first tunnel header information, finding out a corresponding destination gateway MAC and a corresponding destination E1 path number, generating a second tunnel header according to the destination gateway MAC and the destination E1 path number, replacing the first tunnel header with the second tunnel header, forwarding a first path E1 message packaged with the second tunnel header to a second CPE corresponding to the destination gateway, enabling the second CPE to regenerate a second message header corresponding to an original message header according to the second tunnel header, replacing the second tunnel header with the second message header, and sending the first path E1 message packaged with the second message header to the corresponding second path E1.
According to the description, the corresponding target E1 path is queried according to the E1 path forwarding table, so that the smoothness of point-to-point communication of the E1 message is ensured, and the method is simple, flexible and quick.
Referring to fig. 4, an E1 point-to-point communication system includes a first CPE, a second CPE, and a forwarding server, where the forwarding server is wirelessly connected to the first CPE and the second CPE, respectively;
the forwarding server is arranged in the public network;
the first CPE is used for sending a first path E1 message to the forwarding server;
the forwarding server is configured to forward the first path E1 message to the second CPE according to a preset E1 path forwarding table;
the second CPE is configured to send the first path E1 message to a corresponding second path E1.
From the above description, the beneficial effects of the invention are as follows: e1 message is sent through CPE and forwarded through public network, because CPE is the equipment which converts high-speed 4G or 5G signal into WiFi signal or wired network signal, the point-to-point communication of E1 message through wireless network can be realized, the point-to-point communication of E1 can be realized only in the place covered by wireless signal, the service is convenient to spread, 4G network or 5G network can be used to replace PSN to transmit E1 service, and the maintenance cost is low.
Further, the system also comprises a first TDM circuit simulation gateway, wherein the first TDM circuit simulation gateway is connected with the first CPE;
the first CPE is configured to receive a first path of E1 message from the first TDM circuit emulation gateway, determine source MAC information and E1 path information of the message according to the first path of E1 message before forwarding the first path of E1 message to the forwarding server, and send the source MAC information and the E1 path information to the forwarding server, where the source MAC information is a MAC of the first TDM circuit emulation gateway;
the forwarding server is configured to query the preset E1 path forwarding table according to source MAC information and E1 path information of the packet, determine whether to query a corresponding matching item, if so, establish a forwarding tunnel, and send a message that the forwarding tunnel is established successfully to the first CPE;
and the first CPE forwards the first path E1 message to the forwarding server according to the message of successful establishment of the forwarding tunnel.
The above description shows that, before forwarding the message, it is determined whether the forwarding tunnel is successfully established, and the message is forwarded on the premise of successful establishment, so that the reliability and effectiveness of forwarding the message are ensured.
Further, the system also comprises a second TDM circuit simulation gateway, wherein the TDM circuit simulation gateway is connected with the second CPE;
the forwarding the first path E1 message to the forwarding server by the first CPE according to the message that the forwarding tunnel is established successfully includes:
the first CPE replaces an original message header in the first path E1 message with a first tunnel header, wherein the first tunnel header comprises an MAC (media access control) and an E1 path number of the first TDM circuit simulation gateway;
the forwarding server is configured to forward the first path E1 message to the second CPE according to a preset E1 path forwarding table, where the forwarding server includes:
the forwarding server searches a preset E1 path forwarding table according to the first tunnel header information, finds a corresponding destination gateway MAC and a destination E1 path number, generates a second tunnel header according to the destination gateway MAC and the destination E1 path number, replaces the first tunnel header with the second tunnel header, forwards a first path E1 message packaged with the second tunnel header to a second CPE corresponding to the destination gateway, and the destination gateway is the second TDM circuit simulation gateway;
the second CPE is configured to regenerate a second header corresponding to the original header according to the second tunnel header, replace the second tunnel header with the second header, and send the first path E1 packet encapsulated with the second header to a second path E1 corresponding to the second TDM circuit emulation gateway.
According to the description, the corresponding target E1 path is queried according to the E1 path forwarding table, so that the smoothness of point-to-point communication of the E1 message is ensured, and the method is simple, flexible and quick.
Example 1
Referring to fig. 2, a method for E1 peer-to-peer communication by a wireless network includes the steps of:
s1, receiving a first path E1 message forwarded by a first CPE in a public network;
specifically, a forwarding server may be set up on the public network frame, and the forwarding server receives the first path of E1 message forwarded by the first CPE;
the first CPE is connected with the first TDM circuit simulation gateway and is used for receiving a message sent by the first TDM circuit simulation gateway;
s2, forwarding the first path E1 message to a corresponding second CPE according to a preset E1 path forwarding table, and sending the first path E1 message to a corresponding second path E1 through the second CPE;
the second CPE is connected with the second TDM circuit simulation gateway and used for forwarding the first path E1 message to a corresponding second path E1 on the second TDM circuit simulation gateway;
before the point-to-point communication is executed, the TDM circuit simulation gateway is configured and the public network forwarding server is configured;
the first and second paths E1 and E1 are generally used for distinguishing corresponding E1 messages forwarded by the first CPE and the second CPE, and a path of the E1 to which the specific E1 message belongs may be determined according to a specific configuration, for example, the TDM circuit emulation gateway may support E1 of two paths, and the first path E1 message may be a first path E1 of the first TDM circuit emulation gateway, and the second path E1 message may be a second path E1 of the second TDM circuit emulation gateway; or the first path E1 message can be a second path E1 of the first TDM circuit simulation gateway, and the second path E1 message can be a first path E1 of the second TDM circuit simulation gateway; or the first path E1 message can be a first path E1 of the first TDM circuit simulation gateway, and the second path E1 message can be a first path E1 of the second TDM circuit simulation gateway; the first path E1 message can be a second path E1 of the first TDM circuit simulation gateway, and the second path E1 message can be a second path E1 of the second TDM circuit simulation gateway;
in this embodiment, the configuration of the TDM circuit emulation gateway is as follows: assuming that the equipment supports 2 paths of E1 access at most, the transmission protocol is MPLS, the source labels and the destination labels of the two paths of E1 are respectively configured as 1 and 2, and are consistent with the paths, and the destination MAC is configured as any virtual MAC, such as 11-11-11-11-11-11;
the configuration of the public network forwarding server is as follows: configuring the MAC addresses of the interposed TDM circuit simulation gateways to be 00-00-00-00-01 and 00-00-00-00-00-02, and then configuring an E1 path forwarding table, for example, the second path of 00-00-00-00-00-01 and the first path of 00-00-00-00-00-02 can be configured for point-to-point intercommunication of E1 messages Wen Dian;
the step S1 also includes the following steps:
receiving source MAC information and E1 channel information of a message which is sent by the first CPE and is determined according to the first channel E1 message in a public network;
inquiring the preset E1 path forwarding table according to the source MAC information and E1 path information of the message, determining whether a corresponding matching item is inquired, if so, establishing a forwarding tunnel, and sending a message of successful establishment of the forwarding tunnel to the first CPE, so that the first CPE forwards the first path E1 message according to the message of successful establishment of the forwarding tunnel;
the original message header in the first path E1 message received in the step S1 is replaced by a first tunnel header by the first CPE, wherein the first tunnel header comprises the MAC and the E1 path number of a gateway connected with the first CPE;
the step S2 includes:
inquiring a preset E1 path forwarding table (namely a forwarding configuration table) according to the first tunnel header information, finding out corresponding destination gateway MAC and destination E1 path numbers, generating a second tunnel header according to the destination gateway MAC and the destination E1 path numbers, replacing the first tunnel header with the second tunnel header, forwarding a first path E1 message packaged with the second tunnel header to a second CPE corresponding to the destination gateway, enabling the second CPE to regenerate a second message header corresponding to an original message header according to the second tunnel header, replacing the second tunnel header with the second message header, and sending the first path E1 message packaged with the second message header to a corresponding second path E1;
taking the transmission protocol as MPLS, the transmitted E1 message is an MPLS message, and the specific implementation process of the forwarding flow is as follows:
after the TDM circuit simulation gateway equipment is configured, MPLS messages are continuously generated and sent to CPE connected with the TDM circuit simulation gateway equipment through an Ethernet port;
after receiving the MPLS message, the CPE analyzes the message, records source MAC information and path information, reports the information to a forwarding server, starts to attempt to establish a forwarding tunnel, and the source MAC is the MAC of the TDM circuit simulation gateway equipment connected with the CPE;
after receiving the information reported by the CPE, the forwarding server inquires a preset E1 path forwarding table according to the information, and if a corresponding matching item is found, a forwarding tunnel is allowed to be established, and a message of successful tunnel establishment is sent to the CPE;
after receiving the message that the forwarding tunnel is successfully established, the CPE starts to package an E1 service message, removes an MPLS message header from the received MPLS message, packages a tunnel header, wherein the tunnel header comprises a local TDM circuit simulation gateway MAC (i.e. a TDM circuit simulation gateway connected with the CPE) and a channel number, and finally sends the message to a forwarding server;
after receiving the E1 message forwarded by the CPE, the forwarding server inquires a preset E1 path forwarding table according to tunnel header information, regenerates a tunnel header according to the inquired destination gateway MAC and path number, encapsulates the message and sends the message to the corresponding destination CPE;
after receiving the forwarding message, the destination CPE removes the tunnel header, regenerates the MPLS message header according to the tunnel header information, encapsulates and sends the MPLS message header to the local TDM circuit simulation gateway equipment for configuration, and the forwarding process is ended.
Example two
Referring to fig. 3, a terminal 1 for E1 peer-to-peer communication includes a memory 2, a processor 3 and a computer program stored in the memory 2 and executable on the processor 3, wherein the processor 3 implements the steps of the first embodiment when executing the computer program.
Example III
Referring to fig. 4, an E1 point-to-point communication system includes a first CPE, a second CPE, and a forwarding server, where the forwarding server is wirelessly connected to the first CPE and the second CPE, respectively;
the forwarding server is arranged in the public network;
the first CPE is used for sending a first path E1 message to the forwarding server;
the forwarding server is configured to forward the first path E1 message to the second CPE according to a preset E1 path forwarding table (i.e., a forwarding configuration table in the figure);
the second CPE is used for sending the first path E1 message to a corresponding second path E1;
the system further comprises a first TDM circuit emulation gateway, wherein the first TDM circuit emulation gateway is connected with the first CPE;
the first CPE is configured to receive a first path of E1 message from the first TDM circuit emulation gateway, determine source MAC information and E1 path information of the message according to the first path of E1 message before forwarding the first path of E1 message to the forwarding server, and send the source MAC information and the E1 path information to the forwarding server, where the source MAC information is a MAC of the first TDM circuit emulation gateway;
the forwarding server is configured to query the preset E1 path forwarding table according to source MAC information and E1 path information of the packet, determine whether to query a corresponding matching item, if so, establish a forwarding tunnel, and send a message that the forwarding tunnel is established successfully to the first CPE;
the first CPE forwards the first path E1 message to the forwarding server according to the message of successful establishment of the forwarding tunnel;
the system also comprises a second TDM circuit emulation gateway, wherein the TDM circuit emulation gateway is connected with the second CPE;
the forwarding the first path E1 message to the forwarding server by the first CPE according to the message that the forwarding tunnel is established successfully includes:
the first CPE replaces an original message header in the first path E1 message with a first tunnel header, wherein the first tunnel header comprises an MAC (media access control) and an E1 path number of the first TDM circuit simulation gateway;
the forwarding server is configured to forward the first path E1 message to the second CPE according to a preset E1 path forwarding table, where the forwarding server includes:
the forwarding server searches a preset E1 path forwarding table according to the first tunnel header information, finds a corresponding destination gateway MAC and a destination E1 path number, generates a second tunnel header according to the destination gateway MAC and the destination E1 path number, replaces the first tunnel header with the second tunnel header, forwards a first path E1 message packaged with the second tunnel header to a second CPE corresponding to the destination gateway, and the destination gateway is the second TDM circuit simulation gateway;
the second CPE is configured to regenerate a second header corresponding to the original header according to the second tunnel header, replace the second tunnel header with the second header, and send the first path E1 packet encapsulated with the second header to a second path E1 corresponding to the second TDM circuit emulation gateway.
In summary, the method, terminal and system for E1 peer-to-peer communication by means of a wireless network provided by the invention send an E1 message of a TDM circuit emulation gateway through a CPE and forward the E1 message through a forwarding server in a public network, so as to realize E1 peer-to-peer communication, and before forwarding through the forwarding server, a forwarding tunnel is established first, after the forwarding tunnel is established successfully, the CPE converts a message header and then sends the E1 message, ensuring the reliability of E1 message sending, and because the CPE is a device for converting a high-speed 4G or 5G signal into a WiFi signal or a wired network signal, the point-to-peer communication of the E1 message through the wireless network can be realized, so that the point-to-point communication of the E1 message can be realized only in a place covered by the wireless signal, the service can be conveniently unfolded, the E1 service can be transmitted by using a 4G network or a 5G network instead of PSN, the maintenance cost is low, and forwarding configuration operation is concentrated in the forwarding server in the public network, so that configuration is simple, flexible and rapid; meanwhile, as the CPE can be continuously upgraded, the method is not limited to the current 4G network, and along with the development of the mobile communication technology and the popularization of network coverage, the method can realize better application under the coverage of a 5G network or a more advanced mobile network by upgrading the CPE.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent changes made by the specification and drawings of the present invention, or direct or indirect application in the relevant art, are included in the scope of the present invention.
Claims (6)
1. A method of E1 point-to-point communication via a wireless network, comprising the steps of:
receiving source MAC information and E1 channel information of a message which are sent by a first CPE and are determined according to a first channel E1 message in a public network;
inquiring a preset E1 path forwarding table according to the source MAC information and E1 path information of the message, determining whether a corresponding matching item is inquired, if so, establishing a forwarding tunnel, and sending a message of successful establishment of the forwarding tunnel to the first CPE;
s1, determining whether a forwarding tunnel is successfully established, and if so, receiving a first path E1 message forwarded by a first CPE in a public network;
s2, forwarding the first path E1 message to a corresponding second CPE according to a preset E1 path forwarding table, and sending the first path E1 message to the corresponding second path E1 through the second CPE.
2. The method according to claim 1, wherein the original header in the first path E1 message received in step S1 is replaced by a first tunnel header, the first tunnel header containing the MAC and E1 path number of the gateway connected to the first CPE;
the step S2 comprises the following steps:
searching a preset E1 path forwarding table according to the first tunnel header information, finding out a corresponding destination gateway MAC and a corresponding destination E1 path number, generating a second tunnel header according to the destination gateway MAC and the destination E1 path number, replacing the first tunnel header with the second tunnel header, forwarding a first path E1 message packaged with the second tunnel header to a second CPE corresponding to the destination gateway, enabling the second CPE to regenerate a second message header corresponding to an original message header according to the second tunnel header, replacing the second tunnel header with the second message header, and sending the first path E1 message packaged with the second message header to the corresponding second path E1.
3. A terminal for E1 point-to-point communication by means of a wireless network, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the following steps when executing the computer program:
receiving source MAC information and E1 channel information of a message which are sent by a first CPE and are determined according to a first channel E1 message in a public network;
inquiring a preset E1 path forwarding table according to the source MAC information and E1 path information of the message, determining whether a corresponding matching item is inquired, if so, establishing a forwarding tunnel, and sending a message of successful establishment of the forwarding tunnel to the first CPE;
s1, determining whether a forwarding tunnel is successfully established, and if so, receiving a first path E1 message forwarded by a first CPE in a public network;
s2, forwarding the first path E1 message to a corresponding second CPE according to a preset E1 path forwarding table, and sending the first path E1 message to the corresponding second path E1 through the second CPE.
4. A terminal for E1 point-to-point communication by means of a wireless network according to claim 3, wherein the original header in the first path E1 message received in step S1 is replaced by a first tunnel header comprising the MAC and E1 path number of the gateway connected to the first CPE;
the step S2 comprises the following steps:
searching a preset E1 path forwarding table according to the first tunnel header information, finding out a corresponding destination gateway MAC and a corresponding destination E1 path number, generating a second tunnel header according to the destination gateway MAC and the destination E1 path number, replacing the first tunnel header with the second tunnel header, forwarding a first path E1 message packaged with the second tunnel header to a second CPE corresponding to the destination gateway, enabling the second CPE to regenerate a second message header corresponding to an original message header according to the second tunnel header, replacing the second tunnel header with the second message header, and sending the first path E1 message packaged with the second message header to the corresponding second path E1.
5. A system for E1 point-to-point communication via a wireless network, comprising a first CPE, a second CPE and a forwarding server, said forwarding server being wirelessly connected to said first CPE and said second CPE, respectively;
the system further comprises a first TDM circuit emulation gateway, wherein the first TDM circuit emulation gateway is connected with the first CPE;
the first CPE is configured to receive a first path of E1 message from the first TDM circuit emulation gateway, determine source MAC information and E1 path information of the message according to the first path of E1 message before forwarding the first path of E1 message to the forwarding server, and send the source MAC information and the E1 path information to the forwarding server, where the source MAC information is a MAC of the first TDM circuit emulation gateway;
the forwarding server is configured to query a preset E1 path forwarding table according to source MAC information and E1 path information of the packet, determine whether to query a corresponding matching item, if so, establish a forwarding tunnel, and send a message that the forwarding tunnel is established successfully to the first CPE;
the first CPE forwards the first path E1 message to the forwarding server according to the message of successful establishment of the forwarding tunnel;
the forwarding server is arranged in the public network and is used for determining whether a forwarding tunnel is successfully established, and if so, receiving a first path E1 message forwarded by the first CPE;
the first CPE is used for sending a first path E1 message to the forwarding server;
the forwarding server is configured to forward the first path E1 message to the second CPE according to a preset E1 path forwarding table;
the second CPE is configured to send the first path E1 message to a corresponding second path E1.
6. A system for E1 point-to-point communication via a wireless network as recited in claim 5, further comprising a second TDM circuit emulation gateway, said TDM circuit emulation gateway being connected to said second CPE;
the forwarding the first path E1 message to the forwarding server by the first CPE according to the message that the forwarding tunnel is established successfully includes:
the first CPE replaces an original message header in the first path E1 message with a first tunnel header, wherein the first tunnel header comprises an MAC (media access control) and an E1 path number of the first TDM circuit simulation gateway;
the forwarding server is configured to forward the first path E1 message to the second CPE according to a preset E1 path forwarding table, where the forwarding server includes:
the forwarding server searches a preset E1 path forwarding table according to the first tunnel header information, finds a corresponding destination gateway MAC and a destination E1 path number, generates a second tunnel header according to the destination gateway MAC and the destination E1 path number, replaces the first tunnel header with the second tunnel header, forwards a first path E1 message packaged with the second tunnel header to a second CPE corresponding to the destination gateway, and the destination gateway is the second TDM circuit simulation gateway;
the second CPE is configured to regenerate a second header corresponding to the original header according to the second tunnel header, replace the second tunnel header with the second header, and send the first path E1 packet encapsulated with the second header to a second path E1 corresponding to the second TDM circuit emulation gateway.
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