CN1150360A - Full-dispersive replication type T-digital switching network - Google Patents
Full-dispersive replication type T-digital switching network Download PDFInfo
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- CN1150360A CN1150360A CN 95117966 CN95117966A CN1150360A CN 1150360 A CN1150360 A CN 1150360A CN 95117966 CN95117966 CN 95117966 CN 95117966 A CN95117966 A CN 95117966A CN 1150360 A CN1150360 A CN 1150360A
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Abstract
A full-dispersion duplicated T-type digital exchange network features that N input buffer registers and N or N-1 high-speed data buses which can be multiplexed or bridged in serial or parallel mode are added to basic T-type exchange network. N exchange units with same structure form the invented T-type digital exchange network without dependency on transmission medium.
Description
The present invention relates to full-dispersive replication type T-digital switching network, is a kind of brand-new digital switching network structure, particularly is suitable for various dispersions or disperses digital exchange system under (distributed) control mode step by step.Belong to from the digital information function of exchange is the networking technology area of feature.
Digital switching network is the important component part of any digital exchange system, and is all the more so for stored program control (SPC) digital switch.Conventional digital switching network mainly contains on control mode and concentrates and the dispersion dual mode in the prior art, on structure, mainly the various combination form by time switch (T) and these two kinds of modes of space electric wire connecting junction (S) is constituted, and wherein for being adapted to central controlled mode TST (T-S is arranged
n-T) structure, (for example Japanese fujitsu F150 and U.S. AT﹠amp; The 5ESS of T).Space-Time-sky (S-T-S) with in time-time-time (TTT) etc.For adapting to full decentralized control intelligent time switch (TS) structure is arranged again.For example, Belgian BTM-S1240.Yet the digital switching network under the above-mentioned control mode all exists intrinsic defective, and the former is that structural reliability is poor, and economy is not good in the full capacity scope.The latter is that network service usefulness is low and path finding algorithm is complicated, particularly (for example reaches 1,000) when the network node number is very big, and network service usefulness has a strong impact on the disposal ability of whole switch system.Therefore, very be necessary to invent out a kind of switching network of new construction, particularly will adapt to raising, the trend that the control system structure develops towards classificationization, decentralized, multipleization, high efficiency direction along with the microprocessor manufacture level.
The object of the invention is fundamentally to overcome on the basis of existing all drawbacks of existing network and defective, a kind of new Digital switch network architecture is provided, utilize the basic principle and the inherent good characteristic thereof of existing T type switching network, make it enlarging its network capacity, adapting to classification, decentralized control mode by one group of additional device, the raising system carries out the high efficiency communication aspects by means of network itself, and the reliability and the economy contradiction in the full capacity scope of thorough degree solution network configuration are sought best technology solution route.
For achieving the above object, but technical solution of the present invention is the high speed data bus that increases N input buffer memory and N bar or multiple connection of N-1 bar or bridge joint on a basic T type switching network, this bus can walk abreast, it also can be serial, and irrelevant with transmission medium, with the crosspoint formation full-dispersive replication type T-digital switching network of other N-1 same structure.Digital switching network of the present invention comes down to more a kind of digital exchanged form of the broadcast type that N is ordered, and whole (or part) data (information) that all have entire switching network network present frame in the buffer storage (N or N-1) of any one T type crosspoint are videoed.For a definite T type crosspoint, the time of its data exchange only takes place between the buffer storage of this locality and voicebank device.In other words, each T type crosspoint in the network can only be subjected to each local control system control and not need unified centralized control system.Obviously, only one group of simple communication control procedure need be applied, point-to-point between each dispersion treatment unit can be realized easily by this switching network; A bit to multiple spot; Broadcast this three kinds of communication modes.Digital switching network of the present invention is characterised in that:
---in N bar (or N-1 bar) bus one of whole (or part) content of the present frame of N T type crosspoint of all decentralized configuration intactly copies in the corresponding buffer storage of other N or N-1 T electric wire connecting junction and goes.
---content in each buffer storage is periodic refresh frame by frame.
---all N buffer storage in each T type crosspoint participates in inner time-division switching according to typical time switch mode.
---be less than or equal to the maximum number of time slots that single T electric wire connecting junction can be divided on the capacity principle of each buffer storage.The word length of each buffer storage unit is unrestricted in theory.
Full-dispersive replication T digital switching network had both fundamentally been avoided the defective of the diverse network structure under the centralized control self intrinsic unreliability (on system perspective), it is low also to have changed between the each processing unit that irrationality caused of full decentralized control lower network structure communication usefulness fully, and whole system is not reached give the disadvantage of the high throughput of thinking.
Preferred implementation of the present invention and effect thereof will contrast accompanying drawing and be described in detail as follows:
Fig. 1 represents the structure configuration map of digital switching element of the present invention;
Fig. 2 represents that the present invention constitutes a complete switching network figure with N digital switching element;
Fig. 3 represents the application drawing that continues between two-digit crosspoint of the present invention.
Figure 1 shows that digital switching element of the present invention (DSU) structure chart.Therefrom as can be seen, except 1
#-N
#Outside buffer storage and the relevant adapter and controller thereof, this is typical T type time switch that adopt pair words to deposit (TMA, TMB), words are deposited (TMA) employing and are write, control playback mode in proper order, and words are deposited (TMB) and adopted control to write, call over mode.Outlet selector between two words are deposited removes or delivers to TMB in order to determine that corresponding time slot (TS) content is delivered on the output bus (BUS).Words are deposited (TMA) and are deposited output bus through words and link to each other with the output of N buffer storage, are outputed on the bus in the corresponding time slot content which word the output content of definite time slot determines deposit TMA or buffer memory (BM) i by the control memory (CM) of this crosspoint.The word length of controlling each unit is j, and its concrete length depends on that words deposit total unit number of TMA and the BM that is connected.All BM writing modes all employing write formula in proper order, and playback mode only adopts the control playback mode.Because BM does not change content and time order on the BUSi, so deposit content and time location thereof among any one BM all are equal to message form on its input bus, in other words, the content of each BM accurately is consistent with the output bus content of relevant digital switching element by frame structure.Thereby realized the complete copy of each digital switching element (DSU) present frame information in the network.So exchange of the inside of a DSU of the exchange becoming equivalently of the numeral between each digital switching element.Certainly, this exchange also needs to take place in the concrete handshaking procedure two digital switching element institute distributed time slot positional informations in parallel, this problem is to solve easily, suppose that system stipulates the communication time slot of No. 0 time slot of all digital switching elements for this unit, so, can be sent to communication process parts separately to position and relevant information and send by means of the control processor at this time slot calling party or callee place, after understanding according to the communication protocol of system's agreement by debit's communication process parts again, can be sent command adapted thereto by the high-rise control system at this digital crosspoint place and realize the time gas exchange that requires, it is to be noted: each communication process parts will take the receiving slot of a 64KB/S sending time slots and N 64KB/S at least.
Because memory device is cheap, add can be according to the network total capacity require the additions and deletions memory circuit, therefore, the economy of this digital crosspoint does not almost have big difference with typical T electric wire connecting junction, input adaption section before each BM is necessary, otherwise can be because the time delay that exists inevitably in the transmission course and the stationary problem that may exist make the concrete Project Realization very difficulty that becomes.
Fig. 2 is for to constitute complete switching network by N digital switching element.As can be seen from Figure 2, each local control unit all has an output bus and N bar input bus, and every output bus is again the input bus of other N or N-1 digital switching element, dotted line is represented is that output bus to the own corresponding input bus of this digital crosspoint can inner closed loop also can be unified processing or from external closed-loop, bus can adopt various transmission mediums according to circumstances, promptly can be that parallel mode also can be a serial mode, can be that the electrical transmission mode can also be the optical transmission mode, be free on the length of bus and the bandwidth theory, the multiple connection mode of bus and any technical measures that may adopt all are the problems in the specific implementation of the present invention.
In theory, bus can adopt disclosed at present any technology type, comprise the signal on the bus is carried out conversion, reorganization or changes original frame transmission structure etc., but, all technical finesses all must guarantee at receiving terminal, before also promptly being input to the corresponding digital crosspoint, recover its original form and corresponding time location.The exchange of internetwork communications and data as previously mentioned, can stipulate that any one digital switching element fixedly opens up the signaling channel of at least one time slot conduct to the control system at each digital switching element place.Also must open up simultaneously at least N time slot as the collection of letters channel of reception from N system.Since switching network intrinsic broadcast characteristic, be that the content of signaling channel can be simultaneously received by N or N-1 receive channel, if in each communication control unit, apply one group of identical rule, with judgment basis such as address or ID and letter type etc. as the recipient, so, be easy to realize point-to-point, point-to-multipoint and broadcast this three kinds of communication modes, this is for adopting decentralized control, distributed data base, resource is disperseed to share and leaned on Regional Distribution is the modern communications switching system on basis, strong support beyond doubt, bandwidth as for communication channel can solve by the number (receive channel also increases undoubtedly) that increases signaling channel thereupon, in theory, along with the expansion of single T switching network capacity (refers to the increase of the timeslot number that can divide in the cycle of a frame, prior art can reach in 125 microseconds and be divided into 4,096 or 8,192 time slots), the requirement of n * 64KB/S channel width is satisfiable.
As shown in Figure 3, illustrating below between the two-digit crosspoint in the system is process in succession how to finish a call.
" 0 " time slot of supposing No. 1 module is used for No. 1 module signaling channel to No. 2 modules, and " 1 " time slot is the collection of letters channels that come from No. 2 modules.In like manner, the signaling channel of No. 2 modules is " 1 " time slot of No. 2 modules, and collection of letters channel is " 0 " time slot of No. 2 modules, and two modules all have oneself receipts/post a letter.
When user's first when No. 1 module has been assigned with " a 3 " time slot as its send-words-channel, No. 1 module controls system sends an envelope from " 0 " time slot of TM1 and has collection of letters module No. through receiving/post a letter parts, letter type, the calling of the contents such as timeslot number at called number and caller place is believed to No. 2 modules, because the effect that the network information is duplicated, " 0 " time slot of the BM1 of No. 2 modules is fixed and receives " 0 " time slot of TM2 and become the collection of letters channel that parts were received/posted a letter to No. 2 modules, after the calling letter that it carries is passed to the receipts of No. 2 modules/send out parts and is understood by its control assembly, No. 2 modules are idle condition in user's second of confirming its calling, then distribute the give orders or instructions channel and this allocation result as write in reply by it received/post a letter parts through TM2 " 1 " time slot through " 1 " time slot of the BM2 of No. 1 module be sent to again receive/post a letter parts and Be Controlled parts understand of an idle time slot " 234 " as user's second.Because No. 1 module had been informed module to the timeslot number ' 3 ' of its channel of giving orders or instructions No. 2 when user's first was called out, and the channel time slot number ' 234 ' of giving orders or instructions of user's second has also been informed module No. 1 in the letter in reply of No. 2 modules, when both converse, only need No. 1 module that ' 234 ' time slot (being the copied content of the time slot of giving orders or instructions of user's second) of its BM2 is talked about channel as the receipts of user's first and be connected to user's first, otherwise No. 2 modules are connected to user's second with ' 3 ' time slot (being the copied content of the time slot of giving orders or instructions of user's first) of its BM1 as the collection of letters channel of user's second.So the complete two-way telephone circuit between user's first and the user's second has been set up like this.
From top description, can be clear that the complete operation principle of a full-dispersive replication T digital switching network and the very operating process of letter knot thereof, and realize the requirement of the intersection of ideals switching network in the distributed environment.
Protection of the present invention is not subjected to the restriction of feature that embodiment describes, and comprises other modification and the change in claims scope.
Symbol description:
S → P: string → and conversion
MXU: multiplexer
P → S: also → the string conversion
DMXU: the multiple device of multichannel Jie
BUS: output bus
CP: communication process parts
SLIC: user interface circuit
TM (i): voicebank device
BM (i): buffer storage
Claims (6)
1. full-dispersive replication type T-digital switching network, but on a basic T type switching network, increase the high speed data bus of N input buffer memory and N bar or multiple connection of N-1 bar or bridge joint, its bus can walk abreast, or serial, and irrelevant with transmission medium, with the crosspoint formation full-dispersive replication type T-digital switching network of other N-1 same structure.It is more a kind of digital exchanged form of the broadcast type that N is ordered, all or part of data (or information) reflection that in the buffer storage (N or N-1) of any one T type crosspoint, all has entire switching network network present frame, for a definite T type crosspoint, the exchange of time of its data only takes place between the buffer storage of this locality and voicebank device, only one group of simple communication regulations need be applied, point-to-point between each dispersion treatment unit can be realized; Any is to multiple spot and broadcast three kinds of communication modes, it is characterized in that:
---all or part of content of the present frame of N T type crosspoint of all decentralized configuration is through one in N bar or the N-1 bar bus, copies in the corresponding buffer storage of other N or N-1 T type time switch to go;
---content in each buffer storage is periodic refresh frame by frame;
---all N buffer storage in each T type crosspoint participates in inner time-division switching according to typical time switch mode;
---on the capacity principle of each buffer storage≤and maximum number of time slots that single T type time switch can be divided, the word length of each buffer storage unit is unrestricted.
2. the full-dispersive replication type T-digital switching network according to claim 1 is characterized in that: be made up of a plurality of independently digital switching elements, wherein any one or several digital switching element lost efficacy, and did not influence the operation of other unit.
3. according to the full-dispersive replication type T-digital switching network of claim 1, it is characterized in that: each digital switching element only is controlled by local control system, by the rule of communication of one group of agreement, make and finish the numeral exchange between user on two or more digital switching elements or trunking port.
4. according to the full-dispersive replication type T-digital switching network of claim 1, it is characterized in that: the connection between each digital switching element and the transmission means that is adopted and to be connected means irrelevant, and irrelevant with its distribution on the geographic area.
5. according to the full-dispersive replication type T-digital switching network of claim 1, it is characterized in that: the controller of each digital switching element and higher level's control processing system thereof all are independently, and for more higher leveled control of network operation existence and management system.
6. the full-dispersive replication type T-digital switching network system is made up of a plurality of independently digital switching elements, and the corresponding input bus of therebetween each interconnects and is connected with corresponding output bus.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 95117966 CN1150360A (en) | 1995-11-07 | 1995-11-07 | Full-dispersive replication type T-digital switching network |
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| CN 95117966 CN1150360A (en) | 1995-11-07 | 1995-11-07 | Full-dispersive replication type T-digital switching network |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101351992B (en) * | 2006-01-27 | 2012-06-13 | 国际商业机器公司 | Method and system for automatically cloning IT resource structures |
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1995
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101351992B (en) * | 2006-01-27 | 2012-06-13 | 国际商业机器公司 | Method and system for automatically cloning IT resource structures |
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