CN1154029A - Telecommunications network for serving users from two switches - Google Patents
Telecommunications network for serving users from two switches Download PDFInfo
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- CN1154029A CN1154029A CN 96107993 CN96107993A CN1154029A CN 1154029 A CN1154029 A CN 1154029A CN 96107993 CN96107993 CN 96107993 CN 96107993 A CN96107993 A CN 96107993A CN 1154029 A CN1154029 A CN 1154029A
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Abstract
A method and apparatus for serving selected lines and trunks from two or more switches. The selected line and trunks are connected to peripheral units each served by two or more switches. The switches each maintain translation information and the supervisory states of the selected lines and trunks. Advantageously, at low cost, the selected lines and trunks can be provided with service even when one of the switches is out of service.
Description
The present invention relates to improve the method and apparatus of the reliability of service that offers telecommunication user.
The trend of Modern Telecommunication switching system says it is the dependence that constantly increases this telecommunication switching system for certain.For main exchange, the potential loss that for example exchange in the area, Wall Street in New York, even the downtime of a few minutes causes may reach millions of dollar.
Prior art problems is not find that also economic gratifying solution can be that switching system provides stand-by facility in the mode of economy.
In addition, some suppliers of cable TV are just attempting to provide the telephone service inlet on market.For many TV/telephone subscribers, promptly provide the telephone subscriber's of service voice channel to transmit by camera cable via camera cable, the user who is connected can receive and send voice signal by the independent channel of selecting on this cable.This cable voice signal can send to two or more local exchange company.Prior art problems is to lack economic scheme, is used for inserting two or more companies from a single peripheral hardware of this camera cable of terminating.
Can be resolved or make the progress that is better than prior art according to the problems referred to above of the present invention, wherein the peripheral hardware of service request reliability services circuit is connected to two or more switching systems (switch), wherein the switch of each connection remains connected to monitor state record and this record of preparation visit of each circuit of such peripheral hardware, for any one incoming call that arrives each switch that links to each other with this peripheral hardware, this calling can be finished and can not run into race problem by desampler, is busy or spare time because this switch is known this called line; This desampler is notified other each switches, so that guarantee that when this line be busy, other switches are not finished other callings on this same line.For outgoing traffic, can carry out Route Selection via one of each switch that is connected from the calling of one of each circuit that is connected to such peripheral hardware, and the variation of the notified circuit monitoring state of other each switches.In a preferred embodiment of the invention, each switch keeps the translation data (translation data) from this circuit, so that can handle starting and terminating call of this circuit.Advantageously, if a switch is out of order, traffic can start or finishes via other switches.
In a preferred embodiment of the invention, one of each peripheral hardware is a subscriber loop carrier (SLC) system, such as by AT﹠amp; The SLC 96 that T network system company produces, this system has a plurality of output links, and each link transmits a multiplexing signal; In order to realize the present invention, the different switch that the different link of these a plurality of links is connected by terminating in.Each other device with a plurality of multiplexing outputs is each distal line device and remote switching module, and both are by AT﹠amp; T network system public affairs can be made and be used for the 5ESS switch, and the similar products of this system that can obtain from other manufacturers.
According to characteristics of the present invention, if a calling originates from one of switch that is used for multiple access line, with this call terminations in another switch that can be connected to this originating line, then peripheral hardware is required to exchange on this channel of calling out the terminating switch identical with the terminating exchange of called line, and ingress switch request terminating exchange is handled this calling.
According to another characteristics of the present invention, if calling enters a switch that is used for this terminating line and this terminating line is busy and by other switch service, check then whether this terminating line has the Call Waiting service.If (transitional information is included in two switches, and this is just very direct) if this terminating line has call waiting function, then this calling is be redirected to other switch; Carrying out this most direct mode of sending elsewhere is to connect via one between these two switches common trunk line.Be to link to each other with this incoming call at the switch of the calling of serving this terminating line, valuably so that this switch then can be carried out normal call waiting function.
According to a preferred embodiment, carry out " doing " test in the following manner: one of each switch is designated as the local switch of a circuit.This circuit is for busy in the record of switch if testing at this, and then this circuit is handled by the line is busy.If this circuit is utilizable in the state recording of terminating exchange, if then this terminating exchange is a local switch, if this circuit is considered to utilizable and this terminating exchange is not a local switch, but the indicating status from this terminating exchange is changed to the message of " doing " and is confirmed by local switch, also thinks utilizable.Do not having the situation of this confirmation, this circuit is considered to " doing ", and line status is changed into and cannot be utilized; In fact, before expectation confirms, arrive, perhaps will in the near future arrive confirming from the message of local switch.Useful is that if terminating call is normally transmitted by local switch, then the engaged test most time is simple.If wish to transmit more traffic to other switch on this circuit, then the cost for complicated engaged test remains less.In another embodiment, each circuit has a local switch.This switch all upgrades any variation that occurs in the monitoring.This switch is inquired about to determine correct monitor state then.
According to a preferred embodiment, be used to transmit public TV signal and independent voice signal and be terminated to two peripheral hardwares that return to the voice channel of a plurality of TV/telephone subscribers' camera cable.This peripheral hardware is connected to two or more switches, and some switches in these switches can belong to different exchange company.In benefit is that a single peripheral hardware can arrive a plurality of switches by single camera cable of terminating.For this situation, each user on this cable can change their preferred company, and need not come the cross-coupled change of requirement by the memory that changes each user in this peripheral hardware and the switch.
Fig. 1 is the equipment of preferred embodiment of the expression invention that is used to realize the applicant and the block diagram of message; With
Fig. 2 is the flow chart of method of expression applicant's invention.
Fig. 1 is the block diagram of operation of expression applicant's invention.In this exemplary embodiment, two switches 1 and 2 all are connected to has incoming line 4 ..., each output of 5 subscriber loop carrier equipment 3.Circuit 4 ..., the 5th, the circuit that requirement is served especially reliably, therefore being arranged to is two the recurrence, soon provides service by two switches.Line facility such as distal line equipment 25 and 26 is connected to two switches respectively, promptly in the switch 1 and 2 only on one.Data network 17 can be the distributed network that comprises each direct link between each switch and/or the subscribers carrier equipment 3, is used for interconnected users loop component (SLC) 3, switch 1 and switch 2.Though the specific examples of the two returning routes of the service of Xuan Zeing here is remote equipment (SLC), local peripheral hardware such as each line facility, also can be saved two circuits that return.Each all includes switching network 10 and processor 11 switch 1 and switch 2.Be included in the processor is CPU 12 and memory 13.Memory comprises control program 14 and comprises by the data of the circuit of switch service and trunk line and be used for the translation data 15 of Route Selection by the route data of the calling of switch processes, and memory also comprises by the employed operating data of forming such as each circuit of circuit 4 (L4) and the monitor state of each trunk line (busy or not busy) (activity data) 16 of switch.Unlike the prior art be, circuit 4 ..., 5 translation data and operating data are maintained at switch 1 and 2 among both.When a calling of one of these circuits is started or terminating during by the service of one of them switch, because two switches all keep this data, each switch can be handled for the new request to the call terminations of one of these circuits like this.Message 21 and 22 is utilized by switch 1 and switch 2 respectively, notifies the circuit 4 of other switches such as two recurrence ..., the variation of the monitor state of one of each circuit of 5.
Though represented in this example two recurrence equipment are SLC 3, the connection that basic two recurrence schemes also can be used for wireless station or arrive private branch exchange (PBX).More in a broad aspect, a kind of like this peripheral hardware is as user terminal.
In addition, a peripheral hardware can be connected to the receive channel of cable to TV/telephone subscriber, is used to provide TV and telephone signal.The terminology used here cable comprises optical cable and coaxial cable.Peripheral hardware is transformed to the phone voice channel digital channel that is connected to switching system.If each peripheral hardware is two recurrence equipment.For example SLC 3, and the calling subscriber just can for the part outgoing call, perhaps based on per call, select a preferred company to all outgoing calls.For this application type,, then in two switches, do not need to provide this user's conversion and monitor state data if can only select a company.Digital channel can be the ATM(Asynchronous Transfer Mode) channel, and wherein header message (headerinformation) can stipulate to select a concrete company, i.e. a concrete switch.
If a circuit starts one via switch 1 such as circuit 4 and to call out, this call terminations arrives, for example with a circuit that the distal line equipment 26 that is connected to switch 2 links to each other on, then this calling can be sent elsewhere, makes it fully by switch 2 services.(notice that switch 1 can not be separately this call service, because switch 1 can not be 26 services of distal line equipment.) switch 1 receive one start after and receive for example dialing from circuit 4 after, identify this call terminations in switch 2.In order more effectively to handle this calling, switch 1 sends message 23 to SLC 3 via data network 17, and circuit 4 is switched to one of channel that is connected to switch 2 from one of channel of being connected to switch 1.Send a message then to switch 2, provide originating line, terminating number thin number and to the sign of SLC 3 channels, circuit 4 will be connected to switch 2 at present on SLC 3.Then switch 2 just has and finishes this calling information necessary.
Fig. 2 finishes the flow chart of calling out performed operation in the system according to applicant's invention.For cause clearly, all calling ends, no matter originating line, or in-trunk all is called arrival end; All outgoing ends, no matter terminating line, or outgoing trunk all is appointed as the port of export.Be used for being received (operation of square frame 201) at the entry message of the first switch binary channels arrival end.This entry message can be the message of the common channel signalling (SS7) that is used for in-trunk; It can be ISDN (integrated services digital network) initial message from the isdn line of originating call; Can be from the subscriber loop carrier system, such as equipment 3, announcement trunk 4 ..., the originating information of one of 5 callings of starting; Perhaps it can be the lock-on signal from a binary channels trunk line; This trunk line is not the SS7 trunk line, but is the trunk line (for example, multifrequency (MF) trunk line) that its signal transmits in band.Notice that trunk line and circuit can be two the recurrence, so that the reliability of density is provided for network.Test 203 is used for determining whether this binary channels arrival end can be by this switch utilization.If all channels of a switch all hurry, if perhaps no longer service, then terminal can not be utilized by this switch.For example, if normally be sent to switch 1 from the message of SLC 3, but circuit 4 ..., in 5 specific one normally by switch 2 services, may run into the negative decision of test 203.Negate that then this entry message is sent to the switch (operation of square frame 205) into this binary channels arrival end service if test 203 result.After this, just be called the switch of serving at test 203 selecteed switches.This service switch is established to the connection (operation of square frame 207) of binary channels arrival end then.After this, the operation of being carried out by action block 211 and the operation of respectively testing square frame followed are public and are considered to be carried out by service switch.
If test 203 result for being, then the binary channels arrival end is connected to first switch (operation of square frame 209), first switch becomes service switch (if first switch can not insert this circuit owing to have path to utilize from this switch, then this calling is sent to second switch (operation of square frame 205)) at present.Service switch receives data, so that the data (for example, from the initial address message of ISDN phone or from initial SS7 message) that receive before the identification port of export or the processing.If in initial message, be not used in the reception data of the identification port of export, then by calling subscriber or public switch telephone network provide as the numeral of the digital number of dialling or transmission.After receiving addressing information, determine the port of export (operation of square frame 213).In this group of switches 1 ..., in 2, hope will have all outgoings public purpose and public characteristic or both-way trunk line is divided into a trunk line table.The hunting of trunk line that trunk line is distributed in this table of a plurality of inter-exchanges is assigned to one of each exchange usually, and this each switch remains on state (busy, available, as the no longer to serve) record of each trunk line in this table; This selection of switch that hunting switch selects a trunk line and notice serving.By selecting can be linked into via single channel or multichannel peripheral hardware the available trunk line of the switch of serving, what this selection can be partial to call out in the switch of serving finishes.These arguments also can be applied on the circuit of multi-thread hunting group.If the port of export directly provides service by the switch of serving, then call out and directly to finish.If the port of export only provides service by this another one to switch, then the conversion of station code will be indicated and this calling is switched to other switch in peripheral hardware in peripheral hardware in the switch of serving.If the port of export another the right co trunk that is this switch, the transitional information in the switch of then serving will indicate this calling should be sent to another switch.Next step if the port of export is a circuit, is then tested 215 and is used to determine whether that this port of export is for busy.If this port of export is by the single channel circuit of the switch service of serving, then directly carry out engaged test.If this port of export is the single channel circuit by another switch service, (result of test 217 is for denying), then this calling is sent to another switch by a trunk line; , do not require and carry out engaged test in the viewpoint of service switch from just.If the port of export is a binary channels end, then the monitor state for this circuit is maintained in two switches.If the monitor state indication is busy, then circuit can be treated to busy.If monitor state is not busy, and if the switch of serving be local switch for this egress line, then should can be accepted by the spare time state.If call record indicates this outlet for not busy, and the switch of serving is not local switch, and the switch of then serving sends a message to local switch, indicates this circuit to be hunted down.If the switch of serving then receives a confirmation, then this circuit can be treated to idle.If the switch of serving does not receive confirmation, perhaps before receiving, acknowledgement message receives the message that this circuit of indication is busy, and the switch of then serving must be handled this circuit for busy.
If busy test result is not in a hurry for the processed conduct of this port of export,, then tests 217 and be used to determine whether that this port of export is to insert from this switch of serving if perhaps this port of export is a trunk line.Wherein this port of export example that can not insert from this switch of serving be the binary channels circuit, and all channels from the switch of serving to this peripheral hardware (for example subscriber loop carrier equipment 3) all are to utilize.In this case, this calling is connected to another switch so that serve this port of export (operation of square frame 221), then should call out and be handled (operation of square frame 223) in a usual manner.Connection be with other two switches between the same mode of connection done of calling, undertaken by interoffice trunk.If test 217 result is that this port of export can insert from this switch of serving, and then this arrival end is connected to this port of export of the switch of serving in the mode of routine.
If the result of engaged test 215 is these terminating lines is busy, then tests 231 and comprise whether definite port of export has Call Waiting.If not, then busy signal is returned this calling (end block 233) and finishes the further processing of this calling.If the port of export has Call Waiting, the switch service that this calling is being served by whichever advances to the port of export (operation of square frame 235).If this is the switch of serving, then Call Waiting is handled and is undertaken by common mode.If this is not just at service switch, then this calling is called out from the logical situation of switch of serving and is connected facility and be sent to another switch, and when arriving this another switch, this calling runs into normal call wait state (operation of square frame 235).
Claims (10)
1. telecommunications network with two switching systems is characterized in that:
At least one is connected to two ancillary equipment of serving the switching system of a plurality of terminals; With
Be used between two switching systems, transmitting the data network of control messages;
Wherein the calling in any one of this two switching systems or any one calling to by described a plurality of terminals of described ancillary equipment service of starting can be done;
Wherein can be by any one service of two switching systems by any one calling of starting of a plurality of terminals of described ancillary equipment service;
The translation data that wherein is used for by each terminal of described ancillary equipment service is maintained among each of described each switching system;
Wherein be transmitted to another switch of described each switching system by the variation of each terminal monitoring of one of described ancillary equipment and described each switching system service.
2. in the telecommunications network that comprises two switches, a kind of being used to receives the calling of one of group selection circuit or the method for originating call, may further comprise the steps:
Connect described selection sets of lines to the ancillary equipment of serving by two switches;
The translation data that in two switches, keeps the part of described selection sets of lines;
The monitor state that in two switches, keeps the part of described selection sets of lines;
Whether in response to the calling that receives institute's calling or start in first switch of described two switches, it is available to test described circuit;
If described circuit can be used, then catch described circuit; With
Send second switch of a message, upgrade the monitor state of described circuit to described two switches.
3. the method for claim 2, further comprising the steps of:
If described line be busy has Call Waiting and is by the calling of second switch of described switch service on it, then extend described second switch of calling out, by the described second switch service.
4. the method for claim 2 is further comprising the steps of:
Detection the starting of originating call in first switch;
Reception is used to discern the data of described originating call destination;
Determine that described destination served by second switch; With
This originating call is retransmitted to second switch from serving this ancillary equipment that starts.
5. serve the equipment of TV/telecommunication user, this equipment receives telephone service from two or more switches via camera cable, it is characterized in that:
Be connected to the ancillary equipment of a plurality of voice channels on the tv cable system that comprises at least one camera cable;
Many group links, every group of link connects described ancillary equipment to one of described two or more switches;
Wherein said a plurality of voice channel comprises at least two groups and wherein described, the outgoing call on every group of part of at least two groups is sent to the different links of described group of link.
6. the equipment of claim 5, each different company of Local Exchange of switch service of wherein said two or more switches.
7. the equipment of claim 5, each user of wherein said user is described two groups member.
8. the equipment of claim 7, each user of wherein said user selects each company of described local exchange company based on per call.
9. the equipment of claim 7 if each user of wherein said user selects a preferred local exchange company and described local exchange company not to utilize, then uses alternative this locality exchange company.
10. the equipment of claim 5, wherein said ancillary equipment produce ATM(Asynchronous Transfer Mode) signal and wherein said signal header with cell stem (cell header) and are used to guide ATM cell to arrive one of described two or more switches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96107993 CN1154029A (en) | 1995-12-05 | 1996-06-05 | Telecommunications network for serving users from two switches |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US567760 | 1995-12-05 | ||
| CN 96107993 CN1154029A (en) | 1995-12-05 | 1996-06-05 | Telecommunications network for serving users from two switches |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1154029A true CN1154029A (en) | 1997-07-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96107993 Pending CN1154029A (en) | 1995-12-05 | 1996-06-05 | Telecommunications network for serving users from two switches |
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| CN (1) | CN1154029A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1937569B (en) * | 2005-09-13 | 2010-06-23 | 西门子公司 | Message processing method and relative apparatus in local area network |
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1996
- 1996-06-05 CN CN 96107993 patent/CN1154029A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1937569B (en) * | 2005-09-13 | 2010-06-23 | 西门子公司 | Message processing method and relative apparatus in local area network |
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