CN101938452B

CN101938452B - Communication device

Info

Publication number: CN101938452B
Application number: CN 200910088066
Authority: CN
Inventors: 张斌
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2009-07-01
Filing date: 2009-07-01
Publication date: 2013-01-09
Anticipated expiration: 2029-07-01
Also published as: CN101938452A

Abstract

The invention provides a communication device, which comprises an overhead processing module, a mapping module, a logic processing module, a protocol processing module and a network processing module, wherein the overhead processing module is used for receiving an SDH signal, acquiring SDH payload data according to the SDH signal and processing the section overhead; the mapping module is used for converting the SDH payload data acquired by the overhead processing module into multi-channel E1 signals and transmitting the signals to the logic processing module; the logic processing module is used for buffering and adjusting different E1 signals and transmitting the E1 signals which need IMA and/or PPP binding into the same protocol processing module of the protocol processing module; the protocol processing module is used for acquiring ATM cells and/or IP data packets according to an E1 link and transmitting the ATM cells and/or the IP data packets to the network processing module; and the network processing module is used for performing data processing on the ATM cells and/or the IP data packets according to data types and/or service characteristics. The communication device has the advantages of simple implementation and high reliability.

Description

A kind of communicator

Technical field

Relate generally to communication technical field of the present invention relates more specifically to the interface board communicator.

Background technology

The 3G Wireless Communication Equipment generally provides various external interface types, satisfies the purpose of mobile operation flexible networking.Requirement based on reliability, telecom operators require RNC (Radio NetworkController, radio network controller) telecommunication apparatus is supported the requirement at the flexible networking in base station, cloth station, be that the interexchange link of base station is when networking cloth station, do not need to bind one by one with some interface or the veneer of RNC equipment, satisfy on the one hand the flexibility of engineering construction, simultaneously can be by the flexible adjustresources of data configuration in later stage, thereby make things convenient for the upgrade expanding of equipment, and can eliminate line fault that traditional scheme brings to the impact of business.

At present in the actual networking of mobile network, Iub (Interface between NodeB and RNC, logic interfacing between RNC and the NodeB) interface generally adopts channelizing STM-1 (SynchronousTransfer Mode x1, synchronous transfer mode x1) interface board (RNC side) to be connected base station side with IMA E1 interface board) finish RNC and be connected base station in the 3G network with NodeB) connection.

According to traditional networking connected mode, during a plurality of E1 access RNC of same base station, generally access same interface board.Traditional approach is when the interface board fault, can't work in the base station, and need to carry out cutover to E1 when the subsequent transmission network capacity extension, and the engineering construction workload is larger.Based on the consideration of these factors, industry has proposed employing IMA prescription formula and has carried out networking, so that during a plurality of E1 of same base station access RNC, can stride the mouth of not sharing the same light of veneer, strides the access of distinct interface plate.When certain light mouth or certain interface board fault, the base station can work on, and need not E1 is carried out cutover when the subsequent transmission network capacity extension, greatly shortens the network capacity extension cycle in this manner.

Be illustrated in figure 1 as the contrast schematic diagram of single IMA (Inverse Multiplexing for ATM, Inverse Multiplexing over ATM) the prescription formula of Iub interface networking and traditional approach.As shown in Figure 1, in single IMA prescription formula, the n bar E1 of NodeB side forms an IMA group, and n bar E1 can be connected on RNC equipment different the light mouth or interface board in the IMA group.These scheme characteristics are as follows: when certain the bar E1 line fault in the IMA group, IMA group internal fault link can be deleted by system, and the user can use residue transfer resource in the IMA group, can not cause switching of interface single plate, customer service is not interrupted, and user's unaware has strengthened the user and used professional experience impression; Networking, dilatation are convenient, when a light mouth or an interface board e1 resource exhaust, can carry out the base station dilatation in the group by tying up to IMA at other interface board expansion E1 circuit, are convenient to the equipment dilatation demand of engineering construction and operator.

Be illustrated in figure 2 as the contrast schematic diagram of many IMA of Iub interface networking prescription formula and traditional approach.As shown in Figure 2, in many IMA prescription formula, many E1 of NodeB side are divided into N (N＞=1) group IMA group, and every group of IMA group comprises n (n＞=1) bar E1, and E1 can be connected on the different interface board of RNC equipment in each IMA group.These scheme characteristics are as follows: than traditional approach, provide the protection of fault between plate, a single board default only can cause an ima group failure, and traffic load can be undertaken by another IMA group redundant channel, and equipment dependability improves; Shortcoming is that transmission resource needs is double, the waste transfer resource; And when an interface board fault, the user of carrying understands call drop, need carry out veneer and switch to the another one veneer and rebulid session, and the user experiences variation.

In sum, no matter adopt many IMA groups still to adopt the networking of single IMA prescription formula, the advantage that relatively traditional connected mode is brought all is when RNC side joint oralia fault, the base station can work on, and when the subsequent transmission network capacity extension, need not E1 is carried out cutover, shortened the network capacity extension cycle.But, can find out that by above comparison therefore single IMA group implementation becomes the key property that each equipment vendor need to support having very significantly advantage aspect user's experience, the operator's networking dilatation.

Be illustrated in figure 3 as the realization transaction module schematic diagram of organizing based on single IMA in the prior art.Model as shown in Figure 3, when system, backboard need be supported the TDM legacy circuit-switched, to support exchange, minute slotting processing the to TS (Time Slot, time slot), E1, HW (High Way, HW High Way) link.This implementation needs 3 veneers jointly to finish.Veneer 1 is finished channelizing STM-1 AU pointer, SDH (Synchronous Digital Hierarchy, Synchronous Digital Hierarchy) frame overhead is processed, the mapper unit is finished the SDH Frame of channelizing STM-1 and is processed to the mapping of internal 63 E1 data slots, and finish 2M E1 to the multiple connection of 8M HW link/solution multiple connection by inner Mux/Demux (multiplexer/coupler) module, then the circuit switching by veneer inside is sent to backboard to pcm stream.Veneer 2 is the one-level circuit-switched core of device systems inside, can finish PCM (Pulse Code Modulation, the pulse code modulation) time gas exchange to each interface board, can adjust, reallocate the e1 resource of some appointments.Veneer 3 is IMA E1 agreement and service processing board, many E1 links after reintegrating are carried out IMA tie up group, ima protocol processing etc., then the data of processing through ima protocol being converted to ATM (Asynchronous Transfer Mode) cell passes to NP (Network Processor, network processing unit) unit and processes.

Existing traditional scheme needs the veneer of 3 kinds to support, and system realizes complicated, realizes that cost increases greatly.Because the processing links of a professional process increases greatly, equipment dependability reduces, and service delay increases, and the user experiences and experiences variation.The operation emphasis of 3G communication network is take grouped data as main PS (Packet Switching, packet switching) related service, and network is changed evolution to IP (Internet Protocol, Internet protocol).But need special TDM (Time Division Multiple access in the above design, time division multiple access) switching network, and each veneer all needs additionally to increase TDM related chip and module again outside supporting IP access and processing capacity, be not suitable for the evolution to next generation network.The diversity of transmission network needs the programmable hardware platform of universal flexible to support, not only can support the application of present stage ATM mode, only also can support to the smooth migration of IP application by software upgrading, but existing implementation can't support this characteristic demand.

Therefore, need at present simple, the efficient Iub interface implementation of a kind of realization.

Summary of the invention

In order one of to address the above problem, the present invention proposes a kind of communicator, comprise spending process module, mapping block, logic processing module, protocol process module and network process module.Wherein, described spending process module is used for receiving Synchronous Digital Hierarchy SDH signal, according to described SDH signal acquisition SDH payload data and processing section expense; The described SDH payload data that described mapping block is used for described spending process module is obtained is converted to multi-channel E 1 signal, and sends it to described logic processing module; Described logic processing module is used for different described E1 signals is cushioned and adjusts, and needs are carried out the same protocol processes module that described E1 signal that asynchronous transfer mode inverse multiplexing IMA and/or point-to-point protocol PPP tie up group is sent into described protocol process module; Described protocol process module is used for obtaining ATM cell and/or IP packet according to the E1 link, and sends it to described network process module; Described network process module is used for according to data type and/or traffic performance described ATM cell and/or IP packet being carried out the data processing.

According to embodiments of the invention, described logic processing module comprises buffer module, configuration acquisition module, adjusting module and output module.Wherein, described buffer module is used for the described E1 signal after the mapping processing is carried out buffered; Described configuration acquisition module is used for obtaining master control transmission configuration demand; Described adjusting module is used for adjusting E1 link No. order according to described configuration needs; Described output module be used for to use synchronised clock that needs are carried out the same protocol processes module that described E1 signal that IMA and/or PPP tie up group is sent into described protocol process module.

According to embodiments of the invention, described buffer module comprises coupler and multiplexer.

According to embodiments of the invention, described logic processing module comprises on-site programmable gate array FPGA.

According to embodiments of the invention, described protocol process module comprises ima protocol processing module and point-to-point protocol ppp protocol processing module.Wherein, described ima protocol processing module is used for the ATM cell of the described E1 signal of a plurality of carrying ATM cell is recovered, and sends to described network process module by the UTOPIAII bus; Described ppp protocol processing module is used for loading the processing that High-Level Data Link Control HDLC/PPP passage is supported in the software configuration according to IP application scenarios demand.

According to embodiments of the invention, described spending process module also comprises the automatic protection switching module, and it is used for providing the automatic protection switching between the light mouth.

According to embodiments of the invention, described spending process module also comprises clock module, and it is used for output 19.44MHz line-recovered clock, to realize the network time synchronization of communication equipment.

According to embodiments of the invention, described network process module comprises the first network processing module, it is used for the data of ATM Adaptation Layer 5 ATM AAL5 are transmitted, be included in up direction to the AAL5 cell receive, the restructuring of IP message, IP route, inner IPv4 encapsulation, the encapsulation of inner Ethernet and Ethernet message send, and, carry out the reception of Ethernet message, IP route, the segmentation of AAL5 cell and AAL5 cell at down direction and send.

According to embodiments of the invention, described network process module comprises the second network processing module, it is used for the data of ATM Adaptation Layer 2 ATM AAL2 are transmitted, being included in up direction receives the AAL2 cell, common part sublayer CPS restructuring, AAL2 service groups relevant segments and restructuring SSSAR layer protocol, gap marker CID internal user is hinted obliquely at, interconnected fidonetFido V4 version Ipv4 encapsulation, inner Ethernet encapsulation, the transmission of Ethernet message, and carry out the Ethernet message at down direction and receive, the IP route, the CID internal user oppositely shines upon, the CPS grouping, the restructuring of AAL2 message and transmission.

According to embodiments of the invention, described IMA and/or PPP tie up group and comprise that single IMA and/or PPP tie up group and many IMA and/or PPP and tie up group.

According to embodiments of the invention, described communicator is integrated on the veneer.

Communicator proposed by the invention is realized simple, and reliability is high.

Description of drawings

Above-mentioned and/or the additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:

Fig. 1 is single IMA prescription formula of prior art and the contrast schematic diagram of traditional approach;

Fig. 2 is many IMA prescription formula of prior art and the contrast schematic diagram of traditional approach;

Fig. 3 is that the IMA E1 interface of prior art is processed the model structure schematic diagram;

Fig. 4 is the structural representation of communicator according to an embodiment of the invention;

Fig. 5 is logical process schematic flow sheet according to an embodiment of the invention;

Fig. 6 is that IMA according to an embodiment of the invention ties up group processing schematic diagram;

Fig. 7 is process flow figure according to an embodiment of the invention.

Embodiment

The below describes embodiments of the invention in detail, and the example of described embodiment is shown in the drawings.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the present invention, and can not be interpreted as limitation of the present invention.

Be illustrated in figure 4 as the structural representation of communicator according to an embodiment of the invention.This embodiment has increased logic processing module for the drawback of existing implementation, and this module is service resources adjustment, the control centre of whole system.In communication equipment, service resources can comprise the set that system is processed the resources such as resource, user's face processing resource, exchange resource, interface processing resource, and owing to the present invention is described for transmission process, so the present invention only describes transfer resource.It should be noted that, in the single board design logic illustration of above Fig. 4, generally have a Host (main frame) main control processor and finish related chip configuration on the plate, management, initialization and basic controlling protocol processes, because the present invention is described mainly for the transmission process resource, omits among Fig. 4 and do not draw.

As shown in Figure 4, this communicator comprises: spending process module, mapping block, logic processing module, protocol process module and network process module.

Wherein, spending process module is with channelizing light mouth CSTM (Channelized SynchronousTransfer Mode, the channelizing synchronous transfer mode), such as CSTM-1 (Channelized SynchronousTransfer Mode x1, channelizing synchronous transfer mode x1) receives STM (the Synchronous Transfer Mode that optical module is brought, synchronous transfer mode) signal, STM-1 (Synchronous Transfer Mode x1 such as serial 155M, synchronous transfer mode x1) signal, such as the STM-1 signal, therefrom extract line clock, finishing frame delimits, recover SDH (Synchronous DigitalHierarchy, Synchronous Digital Hierarchy) data, the processing section expense.As one embodiment of the present of invention, spending process module is also supported APS (Auto Protect Switch, the automatic protection switching) protection between the light mouth.As one embodiment of the present of invention, spending process module also can provide 19.44MHz line-recovered clock output function, to finish the inter-network synchronization function of communication equipment.

Mapping block, or title E1 mapper, it is used for receiving the overhead processor module with one road SDH payload (AU-4), after removing step by step the path overhead of VC4, TUG-3, TUG-2, TU-12, VC-12 and adjusting pointer, recover the E1 signal, such as 63 E1 signals, send into logic processing module and process.

As one embodiment of the present of invention, logic processing module realizes that in FPGA (Field ProgrammableGate Array, field programmable gate array) the flexible part of FPGA is that it is extensive, able to programme, can expands.Satisfying single IMA (Inverse Multiplexing for ATM, Inverse Multiplexing over ATM) group is striden in the light mouth networking implementation, and logic processing module is finished Demux (coupler) tap, Mux (multiplexer) multiple connection, time slot to different e1 resources are adjusted drop and insert feature.The E1 link that can enter a plurality of light mouths under institute's configuration requirement cushions, adjusts, exports, and many E1 that need IMA to tie up group are sent into same protocol processes module, processes thereby carry out follow-up ima protocol.

Be illustrated in figure 5 as the handling process schematic diagram of logic processing module according to an embodiment of the invention.This logic processing module comprises buffer module, configuration acquisition module, adjusting module and output module.Wherein, buffer module is used for the E1 signal after the mapping processing is carried out buffered; The configuration acquisition module is used for obtaining master control transmission configuration demand; Adjusting module is used for adjusting E1 link No. order according to configuration needs; Output module be used for to use synchronised clock that needs are carried out the same protocol processes module that E1 signal that IMA ties up group is sent into protocol process module.

Be illustrated in figure 6 as IMA according to an embodiment of the invention and tie up group processing schematic diagram.Fig. 6 shows and need to process the 2E1-1 of the 1E1-1 of light mouth 1 and light mouth 2 through FPGA, then sends into the processing procedure of IMA processing unit.

As one embodiment of the present of invention, protocol process module is programmable module.As one embodiment of the present of invention, protocol process module comprises ima protocol processing module and PPP (Point-to-Point, point-to-point protocol) protocol process module.

As one embodiment of the present of invention, ima protocol processing module group can be finished the IMA E1 that is " light mouth quantity * 63E1 " to the maximum and process, major function is that the ATM cell in the E1 link of 63 carrying ATM cell is recovered, by UTOPIAII (Universal Test﹠amp; OperationsPhy of Interface for Atm, ATM universal test and operating physical interface) the bus network processing unit that sends the rear end to processes.

As one embodiment of the present of invention, if the follow-up IP application scenarios conditions of demand that occur, can support HDLC (High level Data Link Control by the software configuration of downloading different editions, High-Level Data Link Control)/processing of PPP passage, and single plate hardware need not to make any modification.

Network process module, or claim NP (Network Processor, network processing unit) Service Processing Module, mainly by the processing of network processing unit completing user face agreement, finish the conversion between ATM and the IP agreement.The data flow that NP will receive from atm interface is processed according to different ATM cell types, finally is converted to the IP packet, sends to next link by scheduling, shaping and processes.As one embodiment of the present of invention, network process module is programmable module.

As one embodiment of the present of invention, network process module comprises first network processing module and second network processing module.

The first network processing module is used for finishing (the ATM Adaptation Layer5 to ATM AAL5, ATM Adaptation Layer 5) function of data retransmission, this module realizes that according to the configuration of board software up direction sends reception, the restructuring of IP message, IP route, inner IPv4 encapsulation, the encapsulation of inner Ethernet, the Ethernet message of AAL5 cell; Down direction is finished the function of the reception of Ethernet message, IP route, AAL5 segmentation, AAL5 transmission.

The second network processing module is used for finishing (the ATM Adaptation Layer2 to ATM AAL2, atm adaptation layer 2) fragment and re assembly of message, this module is according to the reception of board software Configuration up direction to the AAL2 cell, CPS (Common Part Sublayer, common part sublayer) restructuring, AAL2 SSSAR (Service Specific Segmentation And Reassembly, the traffic aided fragment and re assembly) layer protocol, CID (Channel ID, gap marker) internal user is hinted obliquely at, inner Ipv4 (Internet Protocol Version4, Internet protocol V4 version) encapsulation, inner Ethernet encapsulation, the transmission of Ethernet message; Down direction finishes that the reception of Ethernet message, IP route, CID internal user are oppositely shone upon, CPS grouping, the restructuring of AAL2 message and send.

The demand of combined with hardware technical development of the present invention and network application, but made up a technical scheme take the processing resource of as above 3 flexible programmings as core, thus a flexible and changeable hardware platform is provided, adapt to now and following multiple demand scene.

Be illustrated in figure 7 as process flow figure according to an embodiment of the invention.In this flow process, at first the data business is judged, if for IP uses, then transfer to IP PPP/HDLC and process; If for ATM uses, then receive ATM cell from interface, judgement is AAL2 or AAL5.If be AAL5, judge that then data type is SIG (control signal) or IPoA business datum (IP overATM, carrying transmits the IP data based on ATM).If data type is SIG, then transfers to HOSTCPU and process.If data type is IPoA, then carry out successively following steps: to the IPOA decapsulation; Search routing table, obtain inner IP and Ethernet packaging information; Upgrade header (adding inner IP, Ethernet encapsulation); Traffic management; The Ethernet message sends.If be AAL2, then carry out successively following steps: CPS restructuring; SAR (Segmentation And Reassembly, fragment and re assembly) restructuring; Search CID MAP table, obtain forwarding information; Inner IP encapsulation, inner Ethernet encapsulation; The Ethernet message sends.

As one embodiment of the present of invention, this communicator is integrated on the veneer, and the function of using single plate structure to provide " polylith veneer+backboard " of the prior art could realize has realized succinct, optimization, low cost, high efficiency implementation.

Embodiments of the invention can not only satisfy the application of networking under the conventional transmission model; and can support single IMA in veneer or the straddle situation to tie up group, many IMA tie up the reliability networking models such as group; also can support the application scenarioss such as APS protection, IP RAN evolution; flexible design, the use of above different mode only need can be realized by downloading different software versions.

One embodiment of the present of invention develop into starting point to adapt to the present future network that reaches, perspectively by FPGA programmable logic cells, programmable I MA/PPP/HDLC processing unit, programmable parallel network processor unit 3 large flexible components, jointly made up a general exploitation framework that satisfies multi-service, the application of many scenes, thereby can greatly reduce veneer kind, development cost, maintenance cost that the device hardware platform forms, and improve equipment dependability.

Therefore, the beneficial effect of embodiments of the invention comprises: board integration is high, realizes succinctly having improved reliability and the robustness of equipment; Process in each module board, service delay is low, and user's subjective feeling is strong; Support the multiple flexible scene application demands such as traditional E 1 networking, the networking of single IMA group, the networking of many IMA group; Be applicable to ATM, IP transmission means, support backward smooth evolution, support future network to unify the IP form of trend, satisfy IPization network implementation demand.

Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification to these embodiment that scope of the present invention is by claims and be equal to and limit.

Claims

1. a communicator is characterized in that, comprises spending process module, mapping block, logic processing module, protocol process module and network process module, wherein,

Described spending process module is used for receiving Synchronous Digital Hierarchy SDH signal, according to described SDH signal acquisition SDH payload data and processing section expense;

The described SDH payload data that described mapping block is used for described spending process module is obtained is converted to multi-channel E 1 signal, and sends it to described logic processing module;

Described logic processing module is used for different described E1 signals is cushioned and adjusts, and needs are carried out the same protocol processes module that described E1 signal that asynchronous transfer mode inverse multiplexing IMA and/or point-to-point protocol PPP tie up group is sent into described protocol process module;

Described protocol process module is used for obtaining ATM cell and/or IP packet according to the E1 link, and sends it to described network process module;

Described network process module is used for according to data type and/or traffic performance described ATM cell and/or IP packet being carried out the data processing.

2. communicator according to claim 1 is characterized in that, described logic processing module comprises buffer module, configuration acquisition module, adjusting module and output module, wherein,

Described buffer module is used for the described E1 signal after the mapping processing is carried out buffered;

Described configuration acquisition module is used for obtaining master control transmission configuration demand;

Described adjusting module is used for adjusting E1 link No. order according to described configuration needs;

Described output module be used for to use synchronised clock that needs are carried out the same protocol processes module that described E1 signal that IMA and/or PPP tie up group is sent into described protocol process module.

3. communicator according to claim 2 is characterized in that, described buffer module comprises coupler and multiplexer.

4. communicator according to claim 1 is characterized in that, described logic processing module comprises on-site programmable gate array FPGA.

5. communicator according to claim 1 is characterized in that, described protocol process module comprises ima protocol processing module and ppp protocol processing module, wherein,

Described ima protocol processing module is used for the ATM cell of the described E1 signal of a plurality of carrying ATM cell is recovered, and sends to described network process module by UTOPIA II bus;

Described ppp protocol processing module is used for loading the processing that High-Level Data Link Control HDLC/PPP passage is supported in the software configuration according to IP application scenarios demand.

6. communicator according to claim 1 is characterized in that, described spending process module also comprises the automatic protection switching module, and it is used for providing the automatic protection switching between the light mouth.

7. communicator according to claim 1 is characterized in that, described spending process module also comprises clock module, and it is used for output 19.44MHz line-recovered clock, to realize the network time synchronization of communication equipment.

8. communicator according to claim 1, it is characterized in that, described network process module comprises the first network processing module, it is used for the data of ATM Adaptation Layer 5ATM AAL5 are transmitted, be included in up direction to the AAL5 cell receive, the restructuring of IP message, IP route, inner IPv4 encapsulation, the encapsulation of inner Ethernet and Ethernet message send, and, carry out the reception of Ethernet message, IP route, the segmentation of AAL5 cell and AAL5 cell at down direction and send.

9. communicator according to claim 1, it is characterized in that, described network process module comprises the second network processing module, it is used for the data of ATM Adaptation Layer 2ATM AAL2 are transmitted, being included in up direction receives the AAL2 cell, common part sublayer CPS restructuring, the professional concrete Segmentation and Reassembly SSSAR layer protocol of AAL2, gap marker CID internal user is hinted obliquely at, interconnected fidonetFido V4 version Ipv4 encapsulation, inner Ethernet encapsulation, the transmission of Ethernet message, and carry out the Ethernet message at down direction and receive, the IP route, the CID internal user oppositely shines upon, the CPS grouping, the restructuring of AAL2 message and transmission.

10. communicator according to claim 1 is characterized in that, described IMA and/or PPP tie up group and comprise that single IMA and/or PPP tie up group and many IMA and/or PPP and tie up group.

11. described communicator is characterized in that according to claim 1-10, described communicator is integrated on the veneer.