Electric power dispatching small number release system based on IPoE and optical transmission bearer

Abstract

The present invention proposes a dispatching small number release system based on IPoE and optical transmission bearer, which relates to the technical field of power dispatching small number release. By introducing IPoE technology, IP messages are transmitted on E1 links. Considering the compatibility with the program-controlled switch of the power grid master station, a complete dispatching small number release system is constructed on the program-controlled switch of the power grid master station, wherein the E1 user board supports multi-channel analog user access, and the IPoE release module supports multi-channel analog release capacity and supports corresponding multi-channel downstream E1 interfaces. Then, based on the optical transmission network bearer, remote sites are dispatched and released. On the one hand, the characteristics of high reliability and high stability of the dispatching switching network are inherited; on the other hand, the IP frame packet switching technology is introduced to structure the IP voice packet frame so that it can be transmitted in the E1 time slot, so that the status of various remote site devices can be managed and known, and a technical basis is provided for diversified business expansion.

Description

Technical Field

[0001] The present invention relates to the technical field of power dispatching and placing small numbers, and more specifically, to a dispatching and placing small numbers system based on IPoE and optical transmission bearer. Background Art

[0002] The power dispatch telephone is an independent telephone channel built by the power grid enterprise according to the importance of dispatch and the busyness of enterprise management. It can realize the dispatch of the power system and effectively command production. The dispatch telephone can centrally collect and analyze the multi-level network relay signaling messages, realize the centralized monitoring of relay signaling, quickly locate call failures or abnormal signaling messages, generate early warnings and automatically distribute traffic. As the most direct means of power dispatch command, it requires a high degree of reliability. Not only under normal circumstances, but also under severe weather conditions and when accidents occur in the power system, the telephone also needs to be kept open.

[0003] Dispatch trumpet is an important way to deploy dispatch telephones. The traditional dispatch trumpet deployment mode is that the voice service and other services of the remote site are multiplexed into E1 signals through PCM equipment, and then connected to the PCM equipment in the power grid main station through the data transmission network, so as to realize the interconnection of voice service, other services and the power grid main station. For example, the prior art discloses a PCM voice signaling and protocol communication conversion system for a power dispatching communication network. The scheme points out that a remote site generates n E1 signals through PCM machine multiplexing, and transmits and converges to a main station through an optical transmission network SDH. Then, the main station generates an E1 voice switching relay or SIP relay by processing the E1 signal through a signaling protocol converter after cross-connection, digital compression, signaling conversion and IP packet switching, and connects it with the IPPBX device signal. The generated non-voice service signal is connected with the corresponding control terminal. While realizing the conversion of the SIP protocol and the E1 relay protocol for the PCM voice service and non-voice service of the remote substation, the original PCM equipment is retained, reducing the total investment and maintenance costs. However, the current PCM equipment faces problems such as old and discontinued equipment, a large proportion of equipment lacking spare parts and technical support from manufacturers, and a high failure rate, which to a certain extent affect the safe operation of the power grid.

[0004] At the same time, in order to support the development of diversified power grid services, on the one hand, the power grid has established cooperation with major service providers. Due to the differences in the technical characteristics of the program-controlled switches provided by various power grid providers, when developing the number-issuing mode of the power grid master station to the remote site, whether the number-issuing mode is compatible with the original program-controlled switching system of the power grid and whether it affects the reliable operation of the original program-controlled switching system of the power grid are all issues to be considered; on the other hand, the diversification of services has brought challenges to the traditional dispatching and switching mode. With the IPization of power communications and the explosive growth of IP data services, the focus of the entire communication network is gradually shifting to the IP network. The maturity and low-cost advantages of IP network technology make it the first choice for many users. The PCM equipment allocation mode between the power grid master station and the remote site is gradually being eliminated. As a result, many current business applications (such as video, voice, etc.) are generally based on the IP network system. However, some current power private networks still retain a large number of traditional E1 channels. Therefore, in order to enable video and voice equipment based on the IP network system to fully utilize the traditional E1 channels, on the one hand, the old PCM equipment is widely used in power grid communications, and on the other hand, new services require support under the soft switching (based on IP network bearer) mode. Therefore, it is very necessary to study a new technology that can replace the retirement of the current PCM equipment while providing a bearer channel and effective management for the power grid master station to allocate remote sites. Summary of the invention

[0005] In order to solve the problem of how to balance the retirement of PCM equipment and the development of small-number release mode of power grid dispatching under the development of diversified power grid business, the present invention provides a dispatching small-number release system based on IPoE and optical transmission bearer, which integrates the idea of ​​the release mode with the original program-controlled switching system of the power grid, introduces IPoE technology, and releases remote sites based on the optical transmission bearer network. The equipment status can be managed and known, thereby ensuring the reliability of power dispatching.

[0006] In order to achieve the above technical effects, the technical solution of the present invention is as follows:

[0007] A system for scheduling and placing small numbers based on IPoE and optical transmission bearer, the system comprising:

[0008] The program-controlled exchange at the main power grid station is the center for the main power grid station to issue production dispatch and instructions to remote sites;

[0009] The E1 user board is integrated with the program-controlled switch of the power grid master station, providing n-way analog user interface for the program-controlled switch of the power grid master station, thereby supporting n-way analog user number release;

[0010] The IPoE number placement module receives n-channel analog user number placement, Ethernet IP data packets and TDM frames, maps Ethernet IP data packets and multiplexes / demultiplexes TDM frames to obtain framed packet E1 data frames; the IPoE number placement module is provided with n-channel first downstream E1 interfaces, and the framed packet E1 data frames are sent to the optical transmission network through the n-channel first downstream E1 interfaces for transmission;

[0011] The optical transmission network is provided with a second downstream E1 interface and a third downstream E1 interface, the second downstream E1 interface receives framed packet E1 data frames transmitted by n first downstream E1 interfaces, the framed packet E1 data frames enter the optical transmission network, are carried and transmitted by the optical transmission network, and are input into the dedicated dispatching trumpet terminal through the third downstream E1 interface;

[0012] The dedicated dispatching small number terminal receives the framed packet E1 data frame input via the third downlink E1 interface, parses the framed packet E1 data frame into an IP data packet, and distributes it to the remote site service telephone to complete the dispatching of the small number.

[0013] This solution introduces IPoE technology (transmitting IP messages on the E1 link) and builds a complete dispatching and small-number release system on the existing power grid master station programmable switch. The E1 user board supports multi-channel analog user access, and the IPoE release module supports multi-channel analog release capacity and corresponding multi-channel downstream E1 interfaces. This system is used to dispatch and release remote sites (such as substations / converter stations / power plants, etc.) based on the optical transmission network. On the one hand, it inherits the high reliability and high stability of the dispatching and switching network; on the other hand, it introduces IP frame packet switching technology, fully utilizes the currently reserved traditional E1 channels, structures the IP voice packet frames, and enables them to be transmitted in the E1 time slot. The bandwidth can be adjusted according to different devices, so that the status of various remote site devices can be managed and known, providing a technical basis for the expansion of diversified services.

[0014] Preferably, the E1 user board adopts the G.703 protocol consistent with the program-controlled switching system of the power grid master station, is integrated with the program-controlled switching system of the power grid master station, is compatible with the technical characteristics of the program-controlled switching systems provided by different power grid service providers, and realizes the logical splitting and allocation of time slots of the program-controlled switching system of the power grid master station, the number allocation of the program-controlled switching system of the power grid master station, and the encapsulation and verification of voice and dispatch signaling data, thereby ensuring good compatibility with the program-controlled switching system of the power grid master station network without affecting the reliable operation of the original system.

[0015] Preferably, the system further comprises an E1 junction box for supporting the n-way analog user number downstream line released by the program-controlled switch of the power grid master station through the E1 user board.

[0016] Preferably, the system also includes a first downstream E1 cable, which is connected to n first downstream E1 interfaces, and each first downstream E1 interface includes a circuit channel, an IP channel and a management channel; the IPoE number placement module is implemented using a logic programmable FPGA chip, and the IPoE number placement module obtains and stores the standard connection configuration mode of the first downstream E1 cable connected to the n first downstream E1 interfaces, and the standard connection configuration mode includes the first downstream E1 cable serial number and the interface number of the n first downstream E1 interfaces connected thereto, and the IPoE number placement module presets a coded indication signal for the first downstream E1 cable according to the standard connection configuration mode. When the first downstream E1 cable is connected to the corresponding first downstream E1 interface, the IPoE number placement module presets a positive response to the coded indication signal for the first downstream E1 cable; otherwise, the IPoE number placement module issues an alarm.

[0017] Here, the logic programmable FPGA chip uses a dedicated protocol, which is conducive to the interface management of the number placement system. On the one hand, it also ensures transmission security, and the subsequent protocol adjustment is relatively flexible, which can realize future business expansion. On the other hand, this method can also achieve a good balance between deployment capacity and port cost, which is more suitable for actual scale application. In addition, the IPoE number placement module uses a logic programmable FPGA chip to support online detection of the downstream E1 cable connection status, ensuring data transmission security and reliability.

[0018] Preferably, the logic programmable FPGA chip of the IPoE number release module is provided with a first IP packet processing unit and a first E1 data encapsulation processing unit. The first IP packet processing unit performs sending processing on the received Ethernet IP data packet, adds a header flag, a packet sequence number and a checksum to the Ethernet IP data packet, and transmits it to the first E1 data encapsulation processing unit. The first E1 data encapsulation processing unit performs clock data processing on the IP data packet and encapsulates it into an E1 data frame. The E1 data frame is divided into 32 time slots, and each frame transmits 1 byte per time slot. Except for time slot TS0 used for frame synchronization, other time slots can be used as transmission channels. Each E1 data frame can use a maximum of 31 time slots to transmit data. At the same time, the E1 user board splits and allocates the logic of the time slot of the power grid master station programmable switch, and encapsulates the n-way analog user number release data into E1 Data frame, E1 data frame is sent to the optical transmission network for transmission through the n-way first downstream E1 interface, the first downstream E1 cable, and the second downstream E1 interface respectively, and then input into the dedicated dispatching small terminal through the third downstream E1 interface. The dedicated dispatching small terminal is provided with a first E1 data decapsulation processing unit and a second IP packet processing unit. The first E1 data decapsulation processing unit performs frame clock data recovery, frame positioning, and frame parsing processing on the E1 data frame to complete the decapsulation and obtain the IP data fragment. The IP data fragment is transmitted to the second IP packet processing unit. The second IP packet processing unit reassembles the IP data fragment into a complete IP data packet, and judges the integrity and legality of the IP data packet according to the frame header flag, packet sequence number and check, so as to monitor the transmission performance of the data packet in the number placement system and realize the number placement of the remote site service telephone.

[0019] Here, each IP data packet that occupies a bandwidth of about 100Kbps is frame-structured so that it can be transmitted in the E1 time slot. The IP data packet is sliced ​​and encapsulated into an E1 data frame, and the E1 data frame is transmitted to the remote end through the E1 data link. The working clock is regenerated on the remote device, and the E1 data frame is disassembled to complete the reorganization and transmission of the IP data packet. The IPoE (IP message transmission on the E1 link) technology makes the status of the equipment accessed by the remote site manageable and known, providing a technical foundation for the expansion of diversified services. In addition, the integrity and legality of the data packet are judged based on the addition of "frame header flag, packet sequence number and checksum", so as to monitor the data packet transmission performance and the status of each interface port, and support the monitoring and alarm of the downlink E1 link.

[0020] Preferably, the transmission of IP data packets adopts a customized protocol. When the first IP packet processing unit sends and processes the received Ethernet IP data packets, it filters the IP data packets that do not comply with the customized protocol based on the matching of the MAC address and IP address of the IP data packet with the customized protocol, and adds a header flag, packet sequence number and checksum to the IP data packets that comply with the customized protocol.

[0021] Preferably, the optical transmission network is an SDH optical transmission network based on frame structure transmission.

[0022] Preferably, the dedicated dispatch trumpet terminal is provided with a second E1 data encapsulation processing unit and a third IP packet processing unit. After the remote site completes hot key dialing, fault self-checking and call recording, the analog signal data packets and IP data packets in the hot key dialing, fault self-checking and call recording are transmitted to the dedicated dispatch trumpet terminal. The IP data packets are first added with a packet header mark, a packet sequence number and a checksum by the third IP packet processing unit, and then transmitted to the second E1 data encapsulation processing unit. The second E1 data encapsulation unit performs clock data processing on the IP data packets, and the IP data packets together with the analog signal data packets in the hot key dialing, fault self-checking and call recording are encapsulated into E1 data frames.

[0023] The optical transmission network is also provided with a first upstream E1 interface and a second upstream E1 interface, and the IPoE number placement module is also provided with a third upstream E1 interface, a second E1 data decapsulation processing unit and a fourth IP packet processing unit. The E1 data frame is transmitted to the optical transmission network via the first upstream E1 interface, and is output via the second upstream E1 interface of the optical transmission network. The IPoE number placement module detects and confirms the status of the third upstream E1 interface based on the logic programmable FPGA chip, and then the E1 data frame is input into the IPoE number placement module via the third upstream E1 interface. The second upstream E1 interface and the third upstream E1 interface are connected to the IPoE number placement module. 1 interface is provided with an E1 cable for E1 data frame transmission, the third uplink E1 interface includes a circuit channel, a framing signaling channel and a deframing signaling channel, the second E1 data decapsulation processing unit decapsulates the E1 data frame through the deframing signaling channel, the decapsulated E1 data frame is reassembled into an IP data packet through the fourth IP packet processing unit, and the integrity and legality of the IP data packet are judged according to the frame header flag, packet sequence number and check, the IP signal data packet and the analog signal data packet are transmitted to the power grid master station program-controlled switch through the E1 user board, so that the power grid master station and the remote site business telephone establish a call.

[0024] Here, the system also supports uplink transmission from remote sites to the main power grid station, supports the encapsulation, distribution, operation management of voice and signaling data, and the signaling conversion between uplink E1 signaling and downlink E1 signaling, which not only ensures the reliability and security of dispatching communication, but also meets the growing demand for alternative PCM equipment. In addition, during transmission through the uplink E1 port, the integrity and legality of the IP data packet are judged based on the frame header flag, packet sequence number and checksum, and the uplink E1 port link monitoring and alarm can be realized.

[0025] The present invention also proposes a method for scheduling small numbers based on IPoE and optical transmission bearer, and the method comprises the following steps:

[0026] S1. Introduce the E1 user board that is integrated with the power grid master station program-controlled switch. The E1 user board provides n-way analog user interface for the power grid master station program-controlled switch to support n-way analog user number release;

[0027] S2. Use IPoE numbering module to receive n analog user numbers, Ethernet IP packets and TDM frames, and map Ethernet IP packets and multiplex / demultiplex TDM frames to obtain framed packet E1 data frames;

[0028] S3 uses the optical transmission network to carry the transmission frame packet E1 data frame, and then enters the dedicated scheduling small terminal;

[0029] S4. The dedicated dispatching small number terminal receives the framed packet E1 data frame, parses the framed packet E1 data frame into an IP data packet, and distributes it to the remote site service phone to complete the dispatching of the small number.

[0030] Preferably, in step S1, the E1 user board adopts the G.703 protocol consistent with the program-controlled switch of the power grid master station, is integrated with the program-controlled switch of the power grid master station, and is compatible with the technical features of the program-controlled switches provided by different power grid service providers.

[0031] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0032] The present invention proposes a scheduling and placing system for small numbers based on IPoE and optical transmission bearer. By introducing IPoE technology, IP messages are transmitted on the E1 link. Considering the compatibility with the existing power grid master station program-controlled switch, a complete scheduling and placing system for small numbers is constructed on the existing power grid master station program-controlled switch, wherein the E1 user board supports multi-channel analog user access, and the IPoE placing module supports multi-channel analog placing capacity and supports corresponding multi-channel downstream E1 interfaces. Then, based on the optical transmission network bearer, remote sites are scheduled and placed. On the one hand, the characteristics of high reliability and high stability of the scheduling and switching network are inherited; on the other hand, the IP frame packet switching technology is introduced to make full use of the currently reserved traditional E1 channel, and the IP voice packet frame is structured so that it can be transmitted in the E1 time slot, so that the status of various remote site equipment can be managed and known, and a technical basis is provided for diversified business expansion. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A structural diagram showing a system for scheduling and placing small numbers based on IPoE and optical transmission bearer proposed in Embodiment 1 of the present invention;

[0034] Figure 2 A schematic diagram showing the first downstream E1 cable connection status detection proposed in Embodiment 2 of the present invention;

[0035] Figure 3 A schematic diagram showing a data packet processing process for scheduling and placing numbers from a power grid master station to a remote site proposed in Embodiment 3 of the present invention;

[0036] Figure 4 A schematic diagram showing a data packet processing process for uplink transmission from a remote station to a power grid master station proposed in Embodiment 3 of the present invention;

[0037] Figure 5 A schematic diagram showing the process of scheduling small number release based on IPoE and optical transmission bearer proposed in Example 4 of the present invention. DETAILED DESCRIPTION

[0038] The drawings are for illustrative purposes only and should not be construed as limiting the present patent;

[0039] In order to better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the actual size;

[0040] It is understandable to those skilled in the art that descriptions of certain well-known contents in the drawings may be omitted.

[0041] The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting the present patent;

[0042] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0043] Example 1

[0044] IPoE technology, or IP over E1 technology, refers to a technical solution for carrying IP packet services on the 2M interface of an optical transmission network. IP is the core content of a series of network protocols, and is mainly responsible for connectionless packet data transmission; E1 is a coaxial cable interface standard, generally with a speed of 2.048Mbit / s and PCM encoding.

[0045] In the development of diversified power grid services, in order to solve the problem of how to balance the retirement of PCM equipment and the development of power grid dispatching small-number release mode, this embodiment proposes a dispatching small-number release system based on IPoE and optical transmission bearer. The structure diagram of the system is shown in FIG. Figure 1 As shown, see Figure 1 , the system comprising:

[0046] The program-controlled exchange at the main power grid station is the center for the main power grid station to issue production dispatch and instructions to remote sites;

[0047] The E1 user board is integrated with the program-controlled switch of the power grid master station, and provides n-way analog user interface for the program-controlled switch of the power grid master station, so as to support the release of n-way analog users; the user board is divided into analog user board and digital user board. The E1 user board is generally connected to the most common commercially available ordinary telephones (including pulse, dual-tone multi-frequency, hands-free, recording, etc.) or fax machines. The telephones are cheap. In this embodiment, the compatibility idea of ​​the E1 user board and the program-controlled machine of the power grid master station is proposed, and at least 30 analog users are supported.

[0048] The IPoE number placement module, in this embodiment, supports receiving at least 30 analog user number placement capacities, Ethernet IP data packets and TDM frames, and maps Ethernet IP data packets and multiplexes / demultiplexes TDM frames to obtain framed packet E1 data frames; the IPoE number placement module is provided with at least 30 first downstream E1 interfaces, and the framed packet E1 data frames are sent to the optical transmission network for transmission through at least 30 first downstream E1 interfaces;

[0049] Optical transmission network, in this embodiment, the optical transmission network is an SDH optical transmission network based on frame structure transmission, and a second downstream E1 interface and a third downstream E1 interface are provided on the optical transmission network, and the second downstream E1 interface receives at least 30 framed packet E1 data frames transmitted by the first downstream E1 interface, and the framed packet E1 data frames enter the optical transmission network, are carried and transmitted by the optical transmission network, and are input into the dedicated scheduling trumpet terminal through the third downstream E1 interface;

[0050] The dedicated dispatching small number terminal receives the framed packet E1 data frame input via the third downlink E1 interface, parses the framed packet E1 data frame into an IP data packet, and distributes it to the remote site service telephone to complete the dispatching of the small number.

[0051] In this embodiment, the E1 user board adopts the G.703 protocol consistent with the power grid master station program-controlled switch, is integrated with the power grid master station program-controlled switch, is compatible with the technical characteristics of the program-controlled switches provided by different power grid service providers, and realizes the logical splitting and allocation of time slots of the power grid master station program-controlled switch, the number allocation of the power grid master station program-controlled switch, and the encapsulation and verification of voice and dispatch signaling data, thereby ensuring good compatibility with the power grid master station network program-controlled switching system without affecting the reliable operation of the original system.

[0052] In this embodiment, see Figure 1 The system also includes an E1 junction box, which is used to support the n-way analog user number downstream line released by the power grid master station program-controlled switch through the E1 user board.

[0053] Example 2

[0054] In this embodiment, in addition to the basic structure of the scheduling small number release system proposed in Example 1, it also includes a first downstream E1 cable. This embodiment focuses on describing the first downstream E1 cable connecting at least 30 first downstream E1 interfaces. Each first downstream E1 interface includes a circuit channel, an IP channel and a management channel; see Figure 2 The IPoE number placement module is implemented by a logic programmable FPGA chip. The logic programmable FPGA chip adopts a dedicated protocol, which is beneficial to the interface management of the number placement system. On the one hand, it also ensures transmission security, and the subsequent protocol adjustment is relatively flexible, which can realize future business expansion. On the other hand, this method can also achieve a good balance between deployment capacity and port cost, and is more suitable for actual scale application. The IPoE number placement module obtains and stores the standard connection configuration method of the first downstream E1 cable connected to at least 30 first downstream E1 interfaces. The standard connection configuration method includes the first downstream E1 cable sequence number and the interface number of at least 30 first downstream E1 interfaces connected to it. The IPoE number placement module presets a coded indication signal for the first downstream E1 cable according to the standard connection configuration method. In actual implementation, the coded indication signal can correspond to setting an indicator light on the logic programmable FPGA chip. When the first downstream E1 cable is connected to the corresponding first downstream E1 interface, the response of the coded indication signal preset by the IPoE number placement module for the first downstream E1 cable is positive, and the indicator light is on; otherwise, the IPoE number placement module issues an alarm. In this way, the dispatching small number release system supports online detection of the downstream E1 cable connection status under the application of the IPoE release module, ensuring the security and reliability of data transmission.

[0055] Example 3

[0056] In this embodiment, the data transmission processing process with the IPoE number allocation module as the core is described. Figure 3The schematic diagram shows the data packet processing process for dispatching and placing numbers from the power grid master station to the remote site. First, we will give a preliminary introduction to E1 data frames and Ethernet frames. E1 data frames have three modes: framing, multi-framing and unframing. In the framed E1, 8 bits form a time slot (TS), 32 time slots form a frame (F), and 16 frames form a multi-frame (MF). In a frame, TS0 is mainly used to transmit frame alignment signals (FAS), CRC-4 (cyclic redundancy check) and peer alarm indications, TS16 mainly transmits channel associated signaling (CAS), multi-frame alignment signals and multi-frame peer alarm indications, and TS1 to TS15 and TS17 to TS31 have a total of 30 time slots to transmit information such as voice or data. We call TS1 to TS15 and TS17 to TS31 "payload", and TS0 and TS16 "overhead". If out-of-band common channel signaling (CCS) is used, TS16 loses its purpose of transmitting signaling, and the time slot can also be used to transmit information signals. At this time, the payload of the frame structure is TS1 to TS31, and the overhead is only TS0; in the unframed E1, all 32 time slots can be used to transmit valid data; Ethernet frame (Ethernet frame) is a link layer protocol data unit (PDU) that complies with the Ethernet standard, and its format includes Ethernet V1, Ethernet V2, RAW 802.3, IEEE 802.3 / 802.2LLC and IEEE802.3 / 802.2SNAP. Most network applications now use the Ethernet V2 format, while the BPDU between switches uses the IEEE802.3 / LLC format. There are also some standards for managing the transmission of physical data streams in wide area networks using serial media, such as frame relay, advanced data link control, and asynchronous transfer mode.

[0057] In this embodiment, see Figure 3The logic programmable FPGA chip of the IPoE number release module is provided with a first IP packet processing unit and a first E1 data encapsulation processing unit. The first IP packet processing unit performs sending processing on the received Ethernet IP data packet, adds a header mark, a packet sequence number and a checksum to the Ethernet IP data packet, and transmits it to the first E1 data encapsulation processing unit. The first E1 data encapsulation processing unit performs clock data processing on the IP data packet and encapsulates it into an E1 data frame. The E1 data frame is divided into 32 time slots, and each frame and each time slot transmits 1 byte. Except for the time slot TS0 used for frame synchronization, other time slots can be used as transmission channels. Each E1 data frame can use up to 31 time slots to transmit data. At the same time, the E1 user board splits and allocates the logic of the time slot of the power grid master station program-controlled switch, and encapsulates the n-way analog user number release data into E1 data. The E1 data frame is sent to the optical transmission network for transmission through the n-way first downstream E1 interface, the first downstream E1 cable and the second downstream E1 interface respectively, and then input into the dedicated dispatching small terminal through the third downstream E1 interface. The dedicated dispatching small terminal is provided with a first E1 data decapsulation processing unit and a second IP packet processing unit. The first E1 data decapsulation processing unit performs frame clock data recovery, frame positioning and frame parsing on the E1 data frame to complete the decapsulation and obtain the IP data fragments. The IP data fragments are transmitted to the second IP packet processing unit. The second IP packet processing unit reassembles the IP data fragments into a complete IP data packet, and judges the integrity and legality of the IP data packet according to the frame header flag, packet sequence number and checksum, thereby monitoring the transmission performance of the data packet in the number placement system and realizing the number placement of the remote site service telephone.

[0058] Figure 3 The processing process frames IP data packets occupying about 100Kbps bandwidth on each channel, so that they can be transmitted in the E1 time slot. The IP data packets are sliced ​​and encapsulated into E1 data frames, and the E1 data frames are transmitted to the remote end through the E1 data link. The working clock is regenerated on the remote device, and the E1 data frames are disassembled to complete the reorganization and transmission of the IP data packets. The IPoE (IP message transmission on the E1 link) technology makes the status of the equipment accessed by the remote site manageable and known, providing a technical foundation for the expansion of diversified services. In addition, the integrity and legality of the data packet are judged based on the addition of "frame header flag, packet sequence number and checksum", so as to monitor the data packet transmission performance and the status of each interface port, and support the monitoring and alarm of the downlink E1 link.

[0059] In this embodiment, the transmission of IP data packets adopts a customized protocol. When the first IP packet processing unit sends and processes the received Ethernet IP data packets, it filters the IP data packets that do not comply with the customized protocol based on the matching of the MAC address and IP address of the IP data packet with the customized protocol, and adds a header flag, packet sequence number and checksum to the IP data packets that comply with the customized protocol.

[0060] The system initially supports the release of service telephone numbers from the power grid master station to the remote site, and also supports uplink transmission from the remote site to the power grid master station. It supports the encapsulation, distribution, operation management of voice and signaling data, and the conversion of uplink E1 signaling and downlink E1 signaling. Specifically, the schematic diagram of the data packet processing process for uplink transmission from the remote site to the power grid master station is shown in the figure below. Figure 4 As shown, see Figure 4 , a second E1 data encapsulation processing unit and a third IP packet processing unit are provided on the dedicated dispatch trumpet terminal. After the remote site completes hot key dialing, fault self-checking and call recording, the analog signal data packets and IP data packets in the hot key dialing, fault self-checking and call recording are transmitted to the dedicated dispatch trumpet terminal. The IP data packets are first added with a packet header mark, a packet sequence number and a checksum by the third IP packet processing unit, and then transmitted to the second E1 data encapsulation processing unit. The second E1 data encapsulation unit performs clock data processing on the IP data packets, and encapsulates them together with the analog signal data packets in the hot key dialing, fault self-checking and call recording into an E1 data frame;

[0061] The optical transmission network is also provided with a first upstream E1 interface and a second upstream E1 interface. The IPoE number placement module is also provided with a third upstream E1 interface, a second E1 data decapsulation processing unit and a fourth IP packet processing unit. The E1 data frame is transmitted to the optical transmission network via the first upstream E1 interface and output via the second upstream E1 interface of the optical transmission network. The IPoE number placement module detects and confirms the status of the third upstream E1 interface based on the logic programmable FPGA chip. Then, the E1 data frame is input into the IPoE number placement module via the third upstream E1 interface. The second upstream E1 interface and the third upstream E1 interface are connected. An E1 cable for E1 data frame transmission is provided between the interfaces. The third uplink E1 interface includes a circuit channel, a framing signaling channel and a deframing signaling channel. The second E1 data decapsulation processing unit decapsulates the E1 data frame through the deframing signaling channel. The decapsulated E1 data frame is reassembled into an IP data packet through the fourth IP packet processing unit, and the integrity and legality of the IP data packet are judged according to the frame header mark, packet sequence number and checksum. The IP signal data packet and the analog signal data packet are transmitted to the power grid master station program-controlled switch through the E1 user board, so that the power grid master station and the remote site business telephone can establish a call. This not only ensures the reliability and security of dispatching communication, but also meets the needs of the continuous development of alternative PCM equipment. In addition, in the process of transmission through the uplink E1 port, the integrity and legality of the IP data packet are judged according to the frame header mark, packet sequence number and checksum, and the uplink E1 port link can be monitored and alarmed.

[0062] Example 4

[0063] This embodiment is based on the system proposed in Embodiments 1 to 3 and further proposes a method for scheduling small number placement based on IPoE and optical transmission bearer. The flowchart of the method is shown in Figure 5 , specifically including the following steps:

[0064] S1. Introduce an E1 user board that is integrated with the program-controlled switch of the power grid master station. The E1 user board provides n analog user interfaces for the program-controlled switch of the power grid master station to support the release of n analog user numbers. In this embodiment, n is at least 30. The E1 user board adopts the G.703 protocol consistent with the program-controlled switch of the power grid master station, is integrated with the program-controlled switch of the power grid master station, and is compatible with the technical features of the program-controlled switches provided by different service providers of the power grid.

[0065] S2. Use IPoE numbering module to receive n analog user numbers, Ethernet IP packets and TDM frames, and map Ethernet IP packets and multiplex / demultiplex TDM frames to obtain framed packet E1 data frames;

[0066] S3 uses the optical transmission network to carry the transmission frame packet E1 data frame, and then enters the dedicated scheduling small terminal;

[0067] S4. The dedicated dispatching small number terminal receives the framed packet E1 data frame, parses the framed packet E1 data frame into an IP data packet, and distributes it to the remote site service phone to complete the dispatching of the small number.

[0068] Obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A system for scheduling and placing small numbers based on IPoE and optical transmission bearer, characterized in that: The system comprises: The program-controlled exchange at the main power grid station is the center for the main power grid station to issue production dispatch and instructions to remote sites; The E1 user board is integrated with the program-controlled switch of the power grid master station, providing n-way analog user interface for the program-controlled switch of the power grid master station, thereby supporting n-way analog user number release; The IPoE number placement module receives n-channel analog user number placement, Ethernet IP data packets and TDM frames, maps Ethernet IP data packets and multiplexes / demultiplexes TDM frames to obtain framed packet E1 data frames; the IPoE number placement module is provided with n-channel first downstream E1 interfaces, and the framed packet E1 data frames are sent to the optical transmission network through the n-channel first downstream E1 interfaces for transmission; The optical transmission network is provided with a second downstream E1 interface and a third downstream E1 interface, the second downstream E1 interface receives framed packet E1 data frames transmitted by n first downstream E1 interfaces, the framed packet E1 data frames enter the optical transmission network, are carried and transmitted by the optical transmission network, and are input into the dedicated dispatching trumpet terminal through the third downstream E1 interface; The dedicated dispatching small number terminal receives the framed packet E1 data frame input via the third downlink E1 interface, parses the framed packet E1 data frame into an IP data packet, and distributes it to the remote site service telephone to complete the dispatching of the small number.

2. The system for scheduling and placing small numbers based on IPoE and optical transmission bearer according to claim 1 is characterized in that: The E1 user board adopts the G.703 protocol consistent with the program-controlled switching system of the power grid master station, and is integrated with the program-controlled switching system of the power grid master station. It is compatible with the technical features of the program-controlled switching systems provided by different power grid service providers, and realizes the logical splitting and allocation of time slots of the program-controlled switching system of the power grid master station, the number allocation of the program-controlled switching system of the power grid master station, and the encapsulation and verification of voice and dispatch signaling data.

3. The system for scheduling and placing small numbers based on IPoE and optical transmission bearer according to claim 2 is characterized in that: It also includes an E1 junction box, which is used to support the n-way analog user number downstream line released by the program-controlled switch at the main station of the power grid through the E1 user board.

4. The system for scheduling and placing small numbers based on IPoE and optical transmission bearer according to claim 1 is characterized in that: It also includes a first downstream E1 cable, which is connected to n first downstream E1 interfaces, and each first downstream E1 interface includes a circuit channel, an IP channel and a management channel; the IPoE number placement module is implemented by a logic programmable FPGA chip, and the IPoE number placement module obtains and stores the standard connection configuration method of the first downstream E1 cable connected to the n first downstream E1 interfaces, and the standard connection configuration method includes the first downstream E1 cable serial number and the interface number of the n first downstream E1 interfaces connected to it. The IPoE number placement module presets a coded indication signal for the first downstream E1 cable according to the standard connection configuration method. When the first downstream E1 cable is connected to the corresponding first downstream E1 interface, the IPoE number placement module presets a positive response to the coded indication signal for the first downstream E1 cable; otherwise, the IPoE number placement module issues an alarm.

5. The system for scheduling and placing small numbers based on IPoE and optical transmission bearer according to claim 4 is characterized in that: The logic programmable FPGA chip of the IPoE number release module is provided with a first IP packet processing unit and a first E1 data encapsulation processing unit. The first IP packet processing unit performs sending processing on the received Ethernet IP data packet, adds a header mark, a packet sequence number and a checksum to the Ethernet IP data packet, and transmits it to the first E1 data encapsulation processing unit. The first E1 data encapsulation processing unit performs clock data processing on the IP data packet and encapsulates it into an E1 data frame. The E1 data frame is divided into 32 time slots, and each frame transmits 1 byte per time slot. Except for time slot TS0 used for frame synchronization, other time slots can be used as transmission channels. Each E1 data frame can use up to 31 time slots to transmit data. At the same time, the E1 user board splits and allocates the logic of the time slot of the programmable switch of the main station of the power grid, and encapsulates the n-way analog user number release data into E1 data frame, the E1 data frame is sent to the optical transmission network for transmission through the n-way first downstream E1 interface, the first downstream E1 cable, and the second downstream E1 interface, and then input into the dedicated dispatching small terminal through the third downstream E1 interface. The dedicated dispatching small terminal is provided with a first E1 data decapsulation processing unit and a second IP packet processing unit. The first E1 data decapsulation processing unit performs frame clock data recovery, frame positioning, and frame parsing processing on the E1 data frame to complete decapsulation and obtain IP data fragments. The IP data fragments are transmitted to the second IP packet processing unit. The second IP packet processing unit reassembles the IP data fragments into a complete IP data packet, and judges the integrity and legality of the IP data packet according to the frame header flag, packet sequence number and check, so as to monitor the data packet transmission performance and realize the release of the remote site service phone.

6. The system for scheduling and placing small numbers based on IPoE and optical transmission bearer according to claim 5 is characterized in that: The transmission of IP data packets adopts a customized protocol. When the first IP packet processing unit sends and processes the received Ethernet IP data packets, it filters the IP data packets that do not comply with the customized protocol based on the matching of the MAC address and IP address of the IP data packet with the customized protocol, and adds a header flag, packet sequence number and checksum to the IP data packets that comply with the customized protocol.

7. The system for scheduling and placing small numbers based on IPoE and optical transmission bearer according to claim 6 is characterized in that: The optical transmission network is an SDH optical transmission network based on frame structure transmission.

8. The system for scheduling and placing small numbers based on IPoE and optical transmission bearer according to claim 4 is characterized in that: The dedicated dispatch trumpet terminal is provided with a second E1 data encapsulation processing unit and a third IP packet processing unit. After the remote site completes hot key dialing, fault self-checking and call recording, the analog signal data packets and IP data packets in the hot key dialing, fault self-checking and call recording are transmitted to the dedicated dispatch trumpet terminal. The IP data packets are first added with a packet header mark, a packet sequence number and a checksum by the third IP packet processing unit, and then transmitted to the second E1 data encapsulation processing unit. The second E1 data encapsulation unit performs clock data processing on the IP data packets, and encapsulates them into E1 data frames together with the analog signal data packets in the hot key dialing, fault self-checking and call recording. The optical transmission network is also provided with a first upstream E1 interface and a second upstream E1 interface, and the IPoE number placement module is also provided with a third upstream E1 interface, a second E1 data decapsulation processing unit and a fourth IP packet processing unit. The E1 data frame is transmitted to the optical transmission network via the first upstream E1 interface, and is output via the second upstream E1 interface of the optical transmission network. The IPoE number placement module detects and confirms the status of the third upstream E1 interface based on the logic programmable FPGA chip, and then the E1 data frame is input into the IPoE number placement module via the third upstream E1 interface. The second upstream E1 interface and the third upstream E1 interface are connected to the IPoE number placement module. 1 interface is provided with an E1 cable for E1 data frame transmission, the third uplink E1 interface includes a circuit channel, a framing signaling channel and a deframing signaling channel, the second E1 data decapsulation processing unit decapsulates the E1 data frame through the deframing signaling channel, the decapsulated E1 data frame is reassembled into an IP data packet through the fourth IP packet processing unit, and the integrity and legality of the IP data packet are judged according to the frame header flag, packet sequence number and check, the IP signal data packet and the analog signal data packet are transmitted to the power grid master station program-controlled switch through the E1 user board, so that the power grid master station and the remote site business telephone establish a call.

9. A method for scheduling small numbers based on IPoE and optical transmission bearer, characterized in that: The method comprises the following steps: S1. Introduce the E1 user board that is integrated with the power grid master station program-controlled switch. The E1 user board provides n-way analog user interface for the power grid master station program-controlled switch to support n-way analog user number release; S2. Use IPoE numbering module to receive n analog user numbers, Ethernet IP packets and TDM frames, and map Ethernet IP packets and multiplex / demultiplex TDM frames to obtain framed packet E1 data frames; S3 uses the optical transmission network to carry the transmission frame packet E1 data frame, and then enters the dedicated scheduling small terminal; S4. The dedicated dispatching small number terminal receives the framed packet E1 data frame, parses the framed packet E1 data frame into an IP data packet, and distributes it to the remote site service phone to complete the dispatching of the small number.

10. The method for scheduling and placing small numbers based on IPoE and optical transmission bearer according to claim 9, characterized in that: In step S1, the E1 user board adopts the G.703 protocol consistent with the program-controlled switch of the power grid master station, is integrated with the program-controlled switch of the power grid master station, and is compatible with the technical features of the program-controlled switches provided by different service providers of the power grid.

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