CN113301668A - 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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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- 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 of E1 message to a corresponding second CPE according to a preset E1 path forwarding table, and sending the first path of E1 message to a corresponding second path of E1 through the second CPE; the E1 message is sent by the CPE and forwarded through the public network, and the CPE is a device for converting the high-speed 4G or 5G signal into a WiFi signal or a wired network signal, so that the point-to-point communication of the E1 message through a wireless network can be realized, the point-to-point communication of E1 can be realized as long as a place covered by the wireless signal is available, the expansion of the service is convenient, the E1 service can be transmitted by using the 4G network or the 5G network instead of the PSN, and the maintenance cost is low.
Description
The application is a divisional application of a parent application named as 'a method, a terminal and a system for E1 point-to-point communication', with the application number of 201910636253.0, the application date of 2019, 7 and 15.
Technical Field
The present invention relates to the field of mobile communications, and in particular, to a method, a terminal, and a system for E1 peer-to-peer communication via a wireless network.
Background
In 1999, RAD corporation first introduced TDM over IP technology to the market. The TDM over IP technology can provide transmission of E1 or T1 and other circuit services on an IP network, and compared with a traditional telecommunication network, the TDM over IP technology fully exerts the bandwidth and cost advantages of a data network, and provides a simple and low-cost transition scheme for a service provider from the traditional telecommunication network to an all-IP network.
TDM (time division multiplexing) circuit emulation gateway equipment, which is a product developed based on TDM over IP technology, generally has multiple E1 interfaces, is deployed at the edge of a TDM network and a PSN (packet switched network) network, and is implemented by interworking application of conventional TDM equipment based on PSN, and transparently transmits E1 traffic over PSN packet switched networks such as IP, ethernet and MPLS networks (as shown in fig. 1). However, these conventional applications have a large limitation on the network environment, only a wired network is available, the maintenance cost is high, and once the network environment or the connection requirement changes, the configuration of the gateway devices at both ends must be modified accordingly.
At present, the coverage of a 4G network in China is up to more than 95%, and a relatively low network delay and a high peak network rate can also meet the requirement of intercommunication service of TDM circuit simulation gateway equipment, so that it becomes possible to use the 4G network to replace PSN to transmit the E1 service, but at present, an effective and convenient way for realizing the transmission of the E1 service by the 4G network is not available, so that the transmission of the E1 service by the wireless network is realized.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: a method, a terminal and a system for E1 point-to-point communication via a wireless network are provided, which can transmit E1 service via the wireless network and facilitate the expansion of E1 service.
In order to solve the technical problems, the invention adopts a technical scheme that:
a method of E1 peer-to-peer communication over a wireless network, comprising the steps of:
s1, receiving a first path E1 message forwarded by a first CPE in the public network;
and S2, forwarding the first path of E1 message to a corresponding second CPE according to a preset E1 path forwarding table, and sending the first path of E1 message to a corresponding second path of E1 through the second CPE.
In order to solve the technical problem, the invention adopts another technical scheme as follows:
a terminal for peer-to-peer communication via E1 over a wireless network, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor when executing the computer program performing the steps of:
s1, receiving a first path E1 message forwarded by a first CPE in the public network;
and S2, forwarding the first path of E1 message to a corresponding second CPE according to a preset E1 path forwarding table, and sending the first path of E1 message to a corresponding second path of E1 through the second CPE.
In order to solve the technical problem, the invention adopts another technical scheme as follows:
a system for E1 peer-to-peer communication over a wireless network, comprising a first CPE, a second CPE, and a forwarding server, the forwarding server being wirelessly connected to the first CPE and the second CPE, respectively;
the forwarding server is arranged in a 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 packet to the second CPE according to a preset E1 path forwarding table;
and the second CPE is used for sending the first path E1 message to the corresponding second path E1.
The invention has the beneficial effects that: the E1 message is sent by the CPE and forwarded through the public network, and the CPE is a device for converting the high-speed 4G or 5G signal into a WiFi signal or a wired network signal, so that the point-to-point communication of the E1 message through a wireless network can be realized, the point-to-point communication of E1 can be realized as long as a place covered by the wireless signal is available, the expansion of the service is convenient, the E1 service can be transmitted by using the 4G network or the 5G network instead of the PSN, and the maintenance cost is low.
Drawings
Fig. 1 is a schematic structural diagram of a system for transparently transmitting E1 traffic through a PSN packet-switched network in the prior art;
FIG. 2 is a flowchart illustrating steps of a method for peer-to-peer communication of E1 according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a terminal for point-to-point communication of E1 according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a system for peer-to-peer communication of E1 according to an embodiment of the present invention;
description of reference numerals:
1. a terminal of E1 point-to-point communication; 2. a memory; 3. a processor.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
The noun explains:
e1: european 30-channel pulse code modulation PCM E1 for short, the rate is 2.048Mbit/s, and a synchronous time division multiplexing technology is adopted to compound 30 voice channels and 2 control channels on a high-speed channel of 2.048 Mbit/s;
CPE: the client premix Equipment is a mobile signal access device which receives mobile signals and forwards the mobile signals by wireless WIFI signals or wired network signals, and 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 peer-to-peer communication via E1 of a wireless network includes the steps of:
s1, receiving a first path E1 message forwarded by a first CPE in the public network;
and S2, forwarding the first path of E1 message to a corresponding second CPE according to a preset E1 path forwarding table, and sending the first path of E1 message to a corresponding second path of E1 through the second CPE.
From the above description, the beneficial effects of the present invention are: the E1 message is sent by the CPE and forwarded through the public network, and the CPE is a device for converting the high-speed 4G or 5G signal into a WiFi signal or a wired network signal, so that the point-to-point communication of the E1 message through a wireless network can be realized, the point-to-point communication of E1 can be realized as long as a place covered by the wireless signal is available, the expansion of the service is convenient, the E1 service can be transmitted by using the 4G network or the 5G network instead of the PSN, and the maintenance cost is low.
Further, the step of S1 includes the following steps:
receiving source MAC information and E1 path information of a message which is sent by the first CPE and determined according to the first path E1 message in a public network;
and querying 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 queried, if so, establishing a forwarding tunnel, and sending a message that the forwarding tunnel is successfully established to the first CPE, so that the first CPE forwards the first path of E1 message according to the message that the forwarding tunnel is successfully established.
It can be known from the above description that whether the forwarding tunnel is successfully established is determined before the message forwarding is performed, and the message forwarding is performed on the premise of successful establishment, so that the reliability and effectiveness of the message forwarding are ensured.
Further, the original packet header in the first E1 packet received in step S1 is replaced by a first tunnel header by the first CPE, where the first tunnel header includes the MAC of the gateway connected to the first CPE and the E1 path number;
the step S2 includes:
inquiring a preset E1 path forwarding table according to the first tunnel header information, finding a corresponding destination gateway MAC and a 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 encapsulated with the second tunnel header to a second CPE corresponding to the destination gateway, so that the second CPE regenerates a second message header corresponding to the original message header according to the second tunnel header, replaces the second tunnel header with the second message header, and sends the first path E1 message encapsulated with the second message header to a corresponding second path E1.
According to the description, the corresponding destination E1 path is queried according to the E1 path forwarding table, so that the method is simple, flexible and fast, and the smoothness of point-to-point communication of the E1 message is ensured.
Referring to fig. 3, a terminal for peer-to-peer communication of E1 includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the computer program to implement the following steps:
s1, receiving a first path E1 message forwarded by a first CPE in the public network;
and S2, forwarding the first path of E1 message to a corresponding second CPE according to a preset E1 path forwarding table, and sending the first path of E1 message to a corresponding second path of E1 through the second CPE.
From the above description, the beneficial effects of the present invention are: the E1 message is sent by the CPE and forwarded through the public network, and the CPE is a device for converting the high-speed 4G or 5G signal into a WiFi signal or a wired network signal, so that the point-to-point communication of the E1 message through a wireless network can be realized, the point-to-point communication of E1 can be realized as long as a place covered by the wireless signal is available, the expansion of the service is convenient, the E1 service can be transmitted by using the 4G network or the 5G network instead of the PSN, and the maintenance cost is low.
Further, the step of S1 includes the following steps:
receiving source MAC information and E1 path information of a message which is sent by the first CPE and determined according to the first path E1 message in a public network;
and querying 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 queried, if so, establishing a forwarding tunnel, and sending a message that the forwarding tunnel is successfully established to the first CPE, so that the first CPE forwards the first path of E1 message according to the message that the forwarding tunnel is successfully established.
It can be known from the above description that whether the forwarding tunnel is successfully established is determined before the message forwarding is performed, and the message forwarding is performed on the premise of successful establishment, so that the reliability and effectiveness of the message forwarding are ensured.
Further, the original packet header in the first E1 packet received in step S1 is replaced by a first tunnel header by the first CPE, where the first tunnel header includes the MAC of the gateway connected to the first CPE and the E1 path number;
the step S2 includes:
inquiring a preset E1 path forwarding table according to the first tunnel header information, finding a corresponding destination gateway MAC and a 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 encapsulated with the second tunnel header to a second CPE corresponding to the destination gateway, so that the second CPE regenerates a second message header corresponding to the original message header according to the second tunnel header, replaces the second tunnel header with the second message header, and sends the first path E1 message encapsulated with the second message header to a corresponding second path E1.
According to the description, the corresponding destination E1 path is queried according to the E1 path forwarding table, so that the method is simple, flexible and fast, and the smoothness of point-to-point communication of the E1 message is ensured.
Referring to fig. 4, a system for point-to-point communication of E1 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 a 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 packet to the second CPE according to a preset E1 path forwarding table;
and the second CPE is used for sending the first path E1 message to the corresponding second path E1.
As can be seen from the above description, the beneficial effects of the present invention are: the E1 message is sent by the CPE and forwarded through the public network, and the CPE is a device for converting the high-speed 4G or 5G signal into a WiFi signal or a wired network signal, so that the point-to-point communication of the E1 message through a wireless network can be realized, the point-to-point communication of E1 can be realized as long as a place covered by the wireless signal is available, the expansion of the service is convenient, the E1 service can be transmitted by using the 4G network or the 5G network instead of the PSN, and the maintenance cost is low.
Further, the system also 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 E1 packet from the first TDM circuit emulation gateway, determine source MAC information and E1 path information of the packet according to the first path E1 packet before forwarding the first path E1 packet 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 an MAC of the first TDM circuit emulation gateway;
the forwarding server is configured to query the preset E1 path forwarding table according to the source MAC information and the E1 path information of the packet, determine whether a corresponding matching item is queried, establish a forwarding tunnel if the matching item is queried, and send a message that the forwarding tunnel is successfully established to the first CPE;
and the first CPE forwards the first path E1 message to the forwarding server according to the message that the forwarding tunnel is successfully established.
It can be known from the above description that whether the forwarding tunnel is successfully established is determined before the message forwarding is performed, and the message forwarding is performed on the premise of successful establishment, so that the reliability and effectiveness of the message forwarding are ensured.
Further, the system also comprises a second TDM circuit emulation gateway, wherein the TDM circuit emulation gateway is connected with the second CPE;
the forwarding, by the first CPE according to the message that the forwarding tunnel is successfully established, the first path E1 packet to the forwarding server includes:
replacing an original message header in the first path of E1 message by a first tunnel header by the first CPE, wherein the first tunnel header comprises the MAC of the first TDM circuit emulation gateway and the E1 path number;
the forwarding server is configured to forward the first path E1 packet to the second CPE according to a preset E1 path forwarding table, including:
the forwarding server queries 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, and forwards a first path E1 message encapsulating the second tunnel header to a second CPE corresponding to the destination gateway, wherein the destination gateway is the second TDM circuit simulation gateway;
the second CPE is configured to regenerate a second packet header corresponding to the original packet header according to the second tunnel header, replace the second tunnel header with the second packet header, and send the first path E1 packet encapsulating the second packet header to a second path E1 corresponding to the second TDM circuit emulation gateway.
According to the description, the corresponding destination E1 path is queried according to the E1 path forwarding table, so that the method is simple, flexible and fast, and the smoothness of point-to-point communication of the E1 message is ensured.
Example one
Referring to fig. 2, a method for peer-to-peer communication via E1 of a wireless network includes the steps of:
s1, receiving a first path E1 message forwarded by a first CPE in the public network;
specifically, a forwarding server may be established in a public network, and the forwarding server receives a first path E1 message forwarded by a first CPE;
the first CPE is connected with the first TDM circuit simulation gateway and used for receiving messages sent by the first TDM circuit simulation gateway;
s2, forwarding the first path of E1 message to a corresponding second CPE according to a preset E1 path forwarding table, and sending the first path of E1 message to a corresponding second path of E1 through the second CPE;
the second CPE is connected to the second TDM circuit emulation gateway, and is configured to forward the first path E1 packet to a corresponding second path E1 on the second TDM circuit emulation gateway;
before executing the point-to-point communication, configuring equipment and a public network forwarding server for the TDM circuit simulation gateway;
the first path E1 message and the second path E1 are first and second generic fingers, and are used to distinguish corresponding E1 messages forwarded by the first CPE and the second CPE, and a path of E1 to which a 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, the first path E1 message may be the first path E1 of the first TDM circuit emulation gateway, and the second path E1 message may be the second path E1 of the second TDM circuit emulation gateway; or the first path E1 message may be the second path E1 of the first TDM circuit emulation gateway, and the second path E1 message may be the first path E1 of the second TDM circuit emulation gateway; or the first path E1 message may be the first path E1 of the first TDM circuit emulation gateway, and the second path E1 message may be the first path E1 of the second TDM circuit emulation gateway; the first path E1 message may be the second path E1 of the first TDM circuit emulation gateway, and the second path E1 message may be the second path E1 of the second TDM circuit emulation gateway;
in this embodiment, the configuration of the TDM circuit emulation gateway is as follows: assuming that the device supports at most 2 paths of E1 access, the transmission protocol is MPLS, the source label and the destination label of two paths of E1 are respectively matched as 1 and 2, and are consistent with the path, and the destination MAC is configured as any virtual MAC, such as 11-11-11-11;
the configuration of the public network forwarding server is as follows: configuring MAC addresses of a TDM circuit simulation gateway with operation intervention as 00-00-00-00-00-01 and 00-00-00-00-00-02, and then configuring an E1 path forwarding table, for example, configuring a second path of 00-00-00-00-01 and a first path of E1 messages of 00-00-00-00-02 for point-to-point intercommunication;
said step of S1 is preceded by the step of:
receiving source MAC information and E1 path information of a message which is sent by the first CPE and determined according to the first path 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 that the forwarding tunnel is successfully established to the first CPE, so that the first CPE forwards the first path of E1 message according to the message that the forwarding tunnel is successfully established;
replacing an original message header in the first E1 message received in the step S1 with a first tunnel header by the first CPE, where the first tunnel header includes an MAC of a gateway connected to the first CPE and an E1 path number;
the step S2 includes:
inquiring a preset E1 path forwarding table (namely a forwarding configuration table) according to the first tunnel header information, finding a corresponding destination gateway MAC and a 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 encapsulating 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 encapsulating the second message header to a corresponding second path E1;
taking the example that the transmission protocol is MPLS, and the transmitted E1 message is an MPLS message, 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, and starts to try to establish a forwarding tunnel, wherein the source MAC is the MAC of 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, 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 encapsulate the E1 service message, removes the MPLS message header from the received MPLS message, encapsulates the tunnel header, and finally sends the tunnel header to a forwarding server, wherein the tunnel header comprises a local TDM circuit simulation gateway MAC (namely a TDM circuit simulation gateway connected with the CPE) and a path number;
after receiving the E1 message forwarded by the CPE, the forwarding server inquires a preset E1 path forwarding table according to the tunnel header information, regenerates a tunnel header according to the inquired destination gateway MAC and the path number, encapsulates the message and issues the message to the corresponding destination CPE;
and after receiving the forwarding message, the destination CPE removes the tunnel header, then regenerates the MPLS message header according to the tunnel header information, encapsulates and sends the MPLS message header to local TDM circuit simulation gateway equipment for configuration, and then the forwarding process is finished.
Example two
Referring to fig. 3, a terminal 1 for peer-to-peer communication of E1 includes a memory 2, a processor 3, and a computer program stored in the memory 2 and executable on the processor 3, where the processor 3 executes the computer program to implement the steps in the first embodiment.
EXAMPLE III
Referring to fig. 4, a system for point-to-point communication of E1 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 a 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 packet 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 configured to send the first path E1 packet to a corresponding second path E1;
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 E1 packet from the first TDM circuit emulation gateway, determine source MAC information and E1 path information of the packet according to the first path E1 packet before forwarding the first path E1 packet 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 an MAC of the first TDM circuit emulation gateway;
the forwarding server is configured to query the preset E1 path forwarding table according to the source MAC information and the E1 path information of the packet, determine whether a corresponding matching item is queried, establish a forwarding tunnel if the matching item is queried, and send a message that the forwarding tunnel is successfully established to the first CPE;
the first CPE forwards the first path E1 message to the forwarding server according to the message that the forwarding tunnel is successfully established;
the system also comprises a second TDM circuit simulation gateway, wherein the TDM circuit simulation gateway is connected with the second CPE;
the forwarding, by the first CPE according to the message that the forwarding tunnel is successfully established, the first path E1 packet to the forwarding server includes:
replacing an original message header in the first path of E1 message by a first tunnel header by the first CPE, wherein the first tunnel header comprises the MAC of the first TDM circuit emulation gateway and the E1 path number;
the forwarding server is configured to forward the first path E1 packet to the second CPE according to a preset E1 path forwarding table, including:
the forwarding server queries 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, and forwards a first path E1 message encapsulating the second tunnel header to a second CPE corresponding to the destination gateway, wherein the destination gateway is the second TDM circuit simulation gateway;
the second CPE is configured to regenerate a second packet header corresponding to the original packet header according to the second tunnel header, replace the second tunnel header with the second packet header, and send the first path E1 packet encapsulating the second packet header to a second path E1 corresponding to the second TDM circuit emulation gateway.
In summary, the method, the terminal and the system for E1 peer-to-peer communication via a wireless network according to the present invention send an E1 message of a TDM circuit emulation gateway through a CPE and forward the message via a forwarding server in a public network to implement E1 peer-to-peer communication, and before forwarding the message via the forwarding server, a forwarding tunnel is established first, and after the forwarding tunnel is established successfully, the CPE converts a message header and then sends an E1 message, thereby ensuring the reliability of sending the E1 message, because the CPE is a device that converts a high-speed 4G or 5G signal into a WiFi signal or a wired network signal, the E1 message can implement peer-to-peer communication via a wireless network, the peer-to-peer communication of E1 can be implemented as long as there is a wireless signal coverage, the service can be deployed conveniently, the E1 service can be transmitted using a 4G network or a 5G network instead of PSN, and the maintenance cost is low, the forwarding configuration operation is centralized in a forwarding server in the public network, and the configuration is simple, flexible and quick; meanwhile, the CPE can be continuously upgraded, so 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 above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (9)
1. A method for E1 peer-to-peer communication over a wireless network, comprising the steps of:
s1, determining whether the forwarding tunnel is successfully established, if so, receiving a first path of E1 message forwarded by the first CPE in the public network;
and S2, forwarding the first path of E1 message to a corresponding second CPE according to a preset E1 path forwarding table, and sending the first path of E1 message to a corresponding second path of E1 through the second CPE.
2. The method of E1 peer-to-peer communication over a wireless network as recited in claim 1, wherein the step of further S1 is preceded by the steps of:
receiving source MAC information and E1 path information of a message which is sent by the first CPE and determined according to the first path E1 message in a public network;
and 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 that the establishment of the forwarding tunnel is successful to the first CPE.
3. The method according to claim 2, wherein the original header in the first E1 message received in step S1 is replaced with a first tunnel header by the first CPE, and the first tunnel header contains the MAC of the gateway connected to the first CPE and the E1 path number;
the step S2 includes:
inquiring a preset E1 path forwarding table according to the first tunnel header information, finding a corresponding destination gateway MAC and a 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 encapsulated with the second tunnel header to a second CPE corresponding to the destination gateway, so that the second CPE regenerates a second message header corresponding to the original message header according to the second tunnel header, replaces the second tunnel header with the second message header, and sends the first path E1 message encapsulated with the second message header to a corresponding second path E1.
4. A terminal for peer-to-peer communication via E1 over a wireless network, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor when executing the computer program performs the steps of:
s1, determining whether the forwarding tunnel is successfully established, if so, receiving a first path of E1 message forwarded by the first CPE in the public network;
and S2, forwarding the first path of E1 message to a corresponding second CPE according to a preset E1 path forwarding table, and sending the first path of E1 message to a corresponding second path of E1 through the second CPE.
5. The terminal of E1 peer-to-peer communication over a wireless network as claimed in claim 4, wherein the step of further S1 is preceded by the step of:
receiving source MAC information and E1 path information of a message which is sent by the first CPE and determined according to the first path E1 message in a public network;
and 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 that the establishment of the forwarding tunnel is successful to the first CPE.
6. The terminal of E1 peer-to-peer communication through a wireless network according to claim 5, wherein the original header in the first E1 message received in step S1 is replaced with a first tunnel header by the first CPE, and the first tunnel header contains the MAC of the gateway connected to the first CPE and the E1 path number;
the step S2 includes:
inquiring a preset E1 path forwarding table according to the first tunnel header information, finding a corresponding destination gateway MAC and a 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 encapsulated with the second tunnel header to a second CPE corresponding to the destination gateway, so that the second CPE regenerates a second message header corresponding to the original message header according to the second tunnel header, replaces the second tunnel header with the second message header, and sends the first path E1 message encapsulated with the second message header to a corresponding second path E1.
7. A system for E1 peer-to-peer communication over a wireless network, comprising a first CPE, a second CPE, and a forwarding server, the forwarding server being wirelessly connected to the first CPE and the second CPE, respectively;
the forwarding server is arranged in the public network and used for determining whether a forwarding tunnel is successfully established, and if so, receiving a first path of 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 packet to the second CPE according to a preset E1 path forwarding table;
and the second CPE is used for sending the first path E1 message to the corresponding second path E1.
8. The system of E1 point-to-point communication over a wireless network as recited in claim 7, further comprising a first TDM circuit emulation gateway coupled to the first CPE;
the first CPE is configured to receive a first path E1 packet from the first TDM circuit emulation gateway, determine source MAC information and E1 path information of the packet according to the first path E1 packet before forwarding the first path E1 packet 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 an MAC of the first TDM circuit emulation gateway;
the forwarding server is configured to query the preset E1 path forwarding table according to the source MAC information and the E1 path information of the packet, determine whether a corresponding matching item is queried, establish a forwarding tunnel if the matching item is queried, and send a message that the forwarding tunnel is successfully established to the first CPE;
and the first CPE forwards the first path E1 message to the forwarding server according to the message that the forwarding tunnel is successfully established.
9. The system of E1 point-to-point communication over a wireless network as recited in claim 8, further comprising a second TDM circuit emulation gateway coupled to the second CPE;
the forwarding, by the first CPE according to the message that the forwarding tunnel is successfully established, the first path E1 packet to the forwarding server includes:
replacing an original message header in the first path of E1 message by a first tunnel header by the first CPE, wherein the first tunnel header comprises the MAC of the first TDM circuit emulation gateway and the E1 path number;
the forwarding server is configured to forward the first path E1 packet to the second CPE according to a preset E1 path forwarding table, including:
the forwarding server queries 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, and forwards a first path E1 message encapsulating the second tunnel header to a second CPE corresponding to the destination gateway, wherein the destination gateway is the second TDM circuit simulation gateway;
the second CPE is configured to regenerate a second packet header corresponding to the original packet header according to the second tunnel header, replace the second tunnel header with the second packet header, and send the first path E1 packet encapsulating the second packet header to a second path E1 corresponding to the second TDM circuit emulation gateway.
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