CN202276347U

CN202276347U - High-density E1 data acquisition card supporting global positioning system (GPS) timestamp synchronization function

Info

Publication number: CN202276347U
Application number: CN2011204348400U
Authority: CN
Inventors: 邓红峰
Original assignee: GULFSTREAM INSTRUMENT TECHNOLOGIES Ltd
Current assignee: GULFSTREAM INSTRUMENT TECHNOLOGIES Ltd
Priority date: 2011-11-04
Filing date: 2011-11-04
Publication date: 2012-06-13
Anticipated expiration: 2021-11-04

Abstract

The utility model discloses a high-density E1 data acquisition card supporting a global positioning system (GPS) timestamp synchronization function. The high-density E1 data acquisition card comprises a multi-E1 interface module, an E1 physical layer processing module, an E1 high-level data link control (HDLC) frame processing module, a GPS timestamp processing module, a timestamp management and system synchronization module, a system state management module, a peripheral component interconnect (PCI) interface processing module and a buffer module, wherein the E1 physical layer processing module, the E1 HDLC frame processing module and the PCI interface processing module are connected with one another sequentially; the system state management module is connected with the PCI interface processing module; the timestamp management and system synchronization module is connected with the E1 HDLC frame processing module; and the GPS timestamp processing module is connected with the timestamp management and system synchronization module. The overall efficiency of a system is improved and the expandability of an acquisition system is enhanced.

Description

Support gps time to stab the high density E1 data collecting card of synchronizing function

Technical field

The utility model relates to a kind of E1 data collecting card, and particularly a kind of gps time of supporting stabs the high density E1 data collecting card of synchronizing function.

Background technology

Used the E1 transmission technology in current GSM, the GPRS network on a large scale; Be used for information such as transferring voice, data and signaling; The E1 data collecting card is widely used in voice-over-net, data and signaling monitoring and test, and existing technology has mainly adopted system configuration as shown in Figure 1.

Existing technology specially for data acquisition system designs, does not have following deficiency owing to consider versatility:

One, existing E1 capture card does not have caching mechanism, and the risk of lost data packets is high;

Existing E1 capture card is considered cost factor, does not use special memory modules to carry out metadata cache, but possibly directly use the internal memory of host computer.If when the host computer processing transactions is busy, there is the risk of bigger packet discard.

Two, system effectiveness is low;

Because existing E1 capture card is only handled the information of E1 physical layer, by the demarcation and the verification work of host computer handle link layer, host computer is under a fairly large number of situation of E1 interface, and the resource that can consume a large amount of processors has reduced the whole efficiency of system.

Three, ununified synchronous timestamp;

Timestamp is the current time mark that each frame data write down of acquisition system to receiving; Be very important concerning acquisition system; But existing technology has used this machine system time to mark as stabbing fiducial time, and generally needs upper computer software to cooperate, because general operating system can only provide the time mark of Millisecond; Can not satisfy with the requirement of E1 acquisition system microsecond level timestamp mark, cause existing between the different collecting devices error of Millisecond.

Four, the not free synchronization mechanism that stabs can not be expanded;

Most of E1 data acquisition system need be carried out collection analysis to a plurality of interfaces, because existing technology does not have synchronization mechanism, can not expand to a plurality of interfaces.

Five, have only interface quantity few, satisfy the requirement that many interfaces are gathered;

Existing E1 data collecting card generally has only 4 to 8 interfaces, and the not free function of stabbing, and can't analyze the sequencing of the packet that a plurality of different E1 interfaces gather during for a plurality of interface collection analysis.

The utility model content

The utility model technical problem to be solved provides a kind of gps time of supporting and stabs the high density E1 data collecting card of synchronizing function, and its entire system efficient improves and strengthened the extensibility of acquisition system.

For solveing the technical problem; The utility model provides a kind of gps time of supporting to stab the high density E1 data collecting card of synchronizing function; It is characterized in that; It comprises that many E1 interface module, E1 physical layer process module, E1 HDLC frame processing module, gps time stab processing module, timestamp management and system synchronization module, system mode administration module, pci interface processing module, cache module; E1 interface module, E1 physical layer process module, E1 HDLC frame processing module, pci interface processing module are linked in sequence; The system mode administration module is connected with the pci interface processing module, and the timestamp management is connected with E1 HDLC frame processing module with the system synchronization module, and gps time stabs processing module and is connected with the system synchronization module with the timestamp management.

Preferably, said system mode administration module also is connected with a host computer.

The positive progressive effect of the utility model is:

One, adopt hardware cache mechanism, the risk of lost data packets is low; On integrated circuit board specialized designs 128M DDR2 sdram memory chip carry out metadata cache; After receiving the Ethernet data bag of some; Again packet is sent to host computer; If have little time response request at host computer, the internal memory on the integrated circuit board can continue the data that buffer memory is gathered, and greatly reduces the risk of packet discard when gathering like this.

Two, entire system efficient improves; The utility model has adopted hardware that the HDLC Frame is delimited and verification; Greatly alleviated the cpu load of master system, simultaneously, with the communicating by letter of host computer on; Adopted in batches and gathered, be sent in batches upper mechanism; Host computer greatly reduces the number of times of system responses request under the high situation of network traffics, thereby has improved the whole efficiency of system.

Three, precise time stabs; Designed the time management device of nanosecond on the hardware, to each frame data mark of collecting the timestamp of nanosecond, satisfy the needs of the application of the overwhelming majority.

Four, strengthened the extensibility of acquisition system; On hardware designs, adopt the GPS simultaneous techniques; Capture card can independently extract absolute time from the GPS module, all use the acquisition system of this product all can obtain absolute time accurately, have strengthened the extensibility of system; Thereby, be easy to realize the complicated applications of distributed capture.

Five, support 16 pairs of E1 interfaces; The utility model is supported 16 pairs of E1 interfaces, satisfies the communications field data acquisition request of specialty.

Description of drawings

Fig. 1 is the system configuration sketch map that existing technology adopts the E1 transmission technology.

Fig. 2 is the structural representation of the utility model one embodiment.

Embodiment

Lift a preferred embodiment below, and combine accompanying drawing to come the clearer the utility model of intactly explaining.

As shown in Figure 2; The high density E1 data collecting card 1 that the utility model supports gps time to stab synchronizing function comprises many E1 interface module 11, E1 physical layer process module 12, E1 HDLC (High-Level Data Link Control; High-Level Data Link Control) frame processing module 13, gps time stab processing module 18, timestamp management and system synchronization module 16, system mode administration module 17, pci interface processing module 14, cache module 15; E1 interface module 11, E1 physical layer process module 12, E1 HDLC frame processing module 13, pci interface processing module 14 are linked in sequence; System mode administration module 17 is connected with pci interface processing module 14; The timestamp management is connected with E1 HDLC frame processing module 13 with system synchronization module 16; Gps time stabs processing module 18 and is connected with system synchronization module 16 with the timestamp management, and system mode administration module 17 also is connected with a host computer.Cache module 15 can be memory chips such as DDR2 SDRAM.

The operation principle of the utility model is following: at first; Collection gets into hardware system to the E1 transmission signals through the E1 interface module; To receive the conversion that the E1 signal is realized analog to digital by E1 physical layer process module then; E1 HDLC frame processing module is accomplished the HDLC frame head and is delimited and checking treatment, and the Frame of multiport is sorted according to the timestamp sequencing, and E1 HDLC packet is being stored among the buffering area DDR2 SDRAM; Pci interface processing modules implement pci interface protocol function, the data in the DDR2SDRAM buffering area are sent in the buffering area of host computer; Supply the software of host computer to handle, gps time processing modules implement gps time extracts and verification work, and timestamp management and system synchronization module realize the function that the time synchronized between the different mining truck is coordinated.

Though more than described the embodiment of the utility model; But those skilled in the art is to be understood that; These only illustrate, and under the prerequisite of principle that does not deviate from the utility model and essence, can make numerous variations or modification to these execution modes.Therefore, the protection range of the utility model is limited appended claims.

Claims

1. support gps time to stab the high density E1 data collecting card of synchronizing function for one kind; It is characterized in that; It comprises that many E1 interface module, E1 physical layer process module, E1 HDLC frame processing module, gps time stab processing module, timestamp management and system synchronization module, system mode administration module, pci interface processing module, cache module; E1 interface module, E1 physical layer process module, E1 HDLC frame processing module, pci interface processing module are linked in sequence; The system mode administration module is connected with the pci interface processing module; The timestamp management is connected with E1 HDLC frame processing module with the system synchronization module, and gps time stabs processing module and is connected with the system synchronization module with the timestamp management.

2. support gps time as claimed in claim 1 stabs the high density E1 data collecting card of synchronizing function, it is characterized in that said system mode administration module also is connected with a host computer.