WO1999029124A1 - Mapping function and method of transmitting signaling system 7 (ss7) telecommunications messages over data networks - Google Patents
Mapping function and method of transmitting signaling system 7 (ss7) telecommunications messages over data networks Download PDFInfo
- Publication number
- WO1999029124A1 WO1999029124A1 PCT/SE1998/002172 SE9802172W WO9929124A1 WO 1999029124 A1 WO1999029124 A1 WO 1999029124A1 SE 9802172 W SE9802172 W SE 9802172W WO 9929124 A1 WO9929124 A1 WO 9929124A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- message
- mapping
- signaling
- protocol
- mtp
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/64—Hybrid switching systems
- H04L12/6418—Hybrid transport
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/0016—Arrangements providing connection between exchanges
- H04Q3/0025—Provisions for signalling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/64—Hybrid switching systems
- H04L12/6418—Hybrid transport
- H04L2012/6472—Internet
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/64—Hybrid switching systems
- H04L12/6418—Hybrid transport
- H04L2012/6475—N-ISDN, Public Switched Telephone Network [PSTN]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/64—Hybrid switching systems
- H04L12/6418—Hybrid transport
- H04L2012/6486—Signalling Protocols
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13097—Numbering, addressing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13176—Common channel signaling, CCS7
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13204—Protocols
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13216—Code signals, frame structure
Definitions
- This invention relates to radio telecommunication systems and, more particularly, to a mapping function and method of transmitting Signaling System 7 (SS7) telecommunications messages over data networks.
- SS7 Signaling System 7
- the invention in Shinohara relates strictly to data communication networks, and provides each router with routing address information relating to all the other routers in the data network system. Shinohara does not teach or suggest a method of mapping signaling messages in the SS7 Signaling Connection Control Part (SCCP) protocol to data messages in the
- Galloway discloses a lightweight transport protocol which tunnels point-to- point protocol (PPP) data packets between one or more source nodes and a gateway node through an imperfect mesh network (IMN) without requiring the exchange of acknowledgement packets.
- the gateway node is in a network employing the IP protocol.
- the invention in Galloway relates strictly to data communication networks, and recognizes that acknowledgement packets are not required at the IP layer when data transport protocols at higher levels utilize acknowledgement packets to assure reliable communications.
- Galloway does not teach or suggest a method of mapping signaling messages in the SS7 SCCP protocol to data messages in the IP protocol.
- the present invention is a method of modifying a signaling protocol stack to transmit a Signaling System 7 (SS7) telecommunications message over a data network from an origination node to a destination node.
- the signaling protocol stack includes a Signaling Connection Control Part (SCCP) protocol layer on top of a Message Transfer Protocol (MTP) protocol layer.
- SCCP Signaling Connection Control Part
- MTP Message Transfer Protocol
- the method includes the steps of replacing the MTP protocol layer with an Internet Protocol (LP) protocol layer, adding a SCCP-IP mapping function between the SCCP protocol layer and the IP protocol layer, and mapping the SS7 signaling message from the SCCP protocol layer in the origination node into an IP message utilizing the SCCP-IP mapping function.
- the method continues by sending the IP message over the data network from the origination node to the destination node, and mapping the IP message from the IP protocol layer in the destination node into the SS7 signaling message utilizing the SCCP-IP mapping function.
- FIG. 1 (Prior Art) is an illustrative block diagram of an existing generic OSI stack illustrating the seven layers of the OSI model;
- FIG. 2 (Prior Art) is an illustrative block diagram of an existing signaling protocol stack for a telecommunications application
- FIG. 3 is an illustrative block diagram of a telecommunications protocol stack modified in accordance with the teachings of the present invention
- Layer 4 is a transport layer utilizing layers 1 to 3 to provide an end-to-end service having required characteristics for the higher layer functions;
- Layer 6 is a presentation layer that provides means for data formatting and code conversion
- the present invention allows SS7 messages to be carried over any data communication network.
- the present invention utilizes the Internet Protocol (IP) and the fact that the IP protocol generally may be transmitted over any type of data communication network, for example, Ethernet, Token Ring, ATM, etc.
- IP Internet Protocol
- the heart of the invention is a SCCP-
- FIG. 4 is a functional block diagram of the SCCP-IP Mapping Function 31 of the present invention.
- the user interface 34 to the SCCP-IP Mapping Function 31 enables the system operator to set up an address mapping table 41, and to set various IP protocol parameters which cannot be transferred by the SCCP layer.
- TOS Type Of Service
- the second IP parameter that is set through the user interface is called Type Of Service (TOS).
- TOS indicates the type of service to be expected.
- the TOS parameter is not known by the SCCP layer.
- the operator should set the TOS parameter to "no delay” and "high reliability”.
- the TTL and TOS parameters are utilized by the SCCP-IP Mapping
- Function 31 to reformat the SS7 messages received from the SCCP layer, in order to send them through the IP network.
- the SCCP-IP Mapping Function 31 maps certain MTP primitives 43 into IP primitives 44 in order to transport data messages over the IP network.
- the SCCP layer 33 expects to receive certain primitives from the MTP layer (FIG. 2) during normal signaling messaging. These primitives are (1) MTP Transfer Request primitive (MTP-TR); (2) MTP Transfer Indication primitive (MTP-TI); (3) MTP Pause primitive; (4) MTP Resume primitive; and (5) MTP Status primitive.
- MTP-TR MTP Transfer Request primitive
- MTP-TI MTP Transfer Indication primitive
- MTP-TI MTP Transfer Indication primitive
- MTP Pause primitive MTP Pause primitive
- MTP Resume primitive MTP Status primitive.
- the SCCP layer utilizes the MTP-TR primitive to request the MTP layer to transfer a message.
- the MTP layer utilizes the MTP-TI primitive to indicate to the SCCP layer that a message has been received.
- the MTP layer utilizes the MTP Pause primitive to indicate to the SCCP layer that the MTP layer is unable to transfer messages to a given destination.
- the MTP layer utilizes the MTP Resume primitive to indicate to the SCCP layer that the MTP layer can now transfer messages to the given destination.
- the MTP layer utilizes the MTP Status primitive to indicate to the SCCP layer that the MTP layer is partially unable to transfer messages to a given destination.
- the MTP- TR, MTP-TI, and MTP Resume primitives are mapped into LP primitives in the SCCP-
- IP Mapping Function 31 The MTP Pause primitive and the MTP resume primitive have no equivalent in the LP protocol, and are not mapped. Their handling is discussed below.
- the MTP-TR primitive When an SS7 message is received in the SCCP-IP Mapping Function from the SCCP layer, the MTP-TR primitive is mapped into the IP primitive "Send" in the message mapper 45.
- the SS7 address is mapped to the IP address in the mapping table 41, and sent to the message mapper where the IP address is placed in the Send primitive along with the TTL and TOS parameters 42, and the data received in the message from the SCCP layer.
- the MTP-TI primitive is mapped into the IP primitive "Receive".
- the Receive primitive When a destination node receives an LP message, the Receive primitive is generated by the IP layer and sent to the SCCP-IP Mapping Function 31 where the Receive primitive is mapped to the MTP-TI primitive which is understood by the SCCP layer above.
- the Receive primitive includes the data received from the SCCP layer at the origination node.
- the MTP primitives MTP Pause (no data can be transferred) and MTP resume (data can be transferred) have no equivalent in the IP protocol. Therefore, they cannot be transported by the IP network, and the destination SCCP layer cannot receive them.
- the SCCP-IP Mapping Function 31 maps the MTP Status primitive (partially unable to deliver data) into the IP message known as an Internet Control Message Protocol (ICMP) message.
- ICMP messages typically report errors in the processing of datagrams, and may be sent in several situations. For example, the ICMP message is sent to the originating node when a message cannot reach its destination.
- the SCCP-IP Mapping Function generates a pseudo response to support the reporting of message status.
- FIG. 5 illustrates an exemplary communication of a data message from a first telecommunication node (Node A) 51 to a second telecommunication node (Node B)
- the SCCP layer in Node A (SCCP-A) 54 sends a MTP-TR primitive to the SCCP-IP Mapping Function- A 55.
- the MTP-TR primitive is normally utilized to request a
- the SCCP-IP Mapping Function-A pulls the SS7 destination address from the message and maps the SS7 destination address (in this case, SCCP-B 59) to the corresponding IP destination address (in this case, IP-B 57) utilizing the address mapping table 41.
- the SCCP-IP Mapping Function-A then adds the LP protocol parameters TTL and TOS 42 to the message.
- the TTL and TOS parameters are placed in the Send LP primitive and are sent to the IP-A layer 56.
- the destination address in the Send primitive is IP-B 57.
- the message then goes through the IP network 53 from the IP-A layer 56 in Node A 51 to the LP-B layer 57 in Node B 52.
- the Receive primitive is sent to the SCCP-IP Mapping Function-B 58.
- the Receive primitive includes the message data, the TTL and TOS parameters 42, and the IP destination address (IP-B) 57.
- the SCCP-IP Mapping Function-B 58 maps the IP address (IP-B) to the corresponding SS7 address (SCCP-B) 59 utilizing its address mapping table, and passes the data up to the SCCP-B layer 59 by removing the TTL and TOS IP parameters and reformatting the data using the MTP-TI primitive which indicates to the SCCP-B layer that data has been received.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NZ504450A NZ504450A (en) | 1997-12-01 | 1998-11-27 | Mapping function and method of transmitting signalling system 7 (SS7) telecommunications messages over data networks |
AU15804/99A AU758333B2 (en) | 1997-12-01 | 1998-11-27 | Mapping function and method of transmitting signaling system 7 (SS7) telecommunications messages over data networks |
GB0013646A GB2347047B (en) | 1997-12-01 | 1998-11-27 | Mapping function and method of transmitting signaling system 7 (SS7) telecommunications messages over data networks |
CA002312909A CA2312909C (en) | 1997-12-01 | 1998-11-27 | Mapping function and method of transmitting signaling system 7 (ss7) telecommunications messages over data networks |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/980,740 | 1997-12-01 | ||
US08/980,740 US6178181B1 (en) | 1997-12-01 | 1997-12-01 | Mapping function and method of transmitting signaling system 7(SS7) telecommunications messages over data networks |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999029124A1 true WO1999029124A1 (en) | 1999-06-10 |
Family
ID=25527810
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE1998/002172 WO1999029124A1 (en) | 1997-12-01 | 1998-11-27 | Mapping function and method of transmitting signaling system 7 (ss7) telecommunications messages over data networks |
Country Status (7)
Country | Link |
---|---|
US (1) | US6178181B1 (en) |
AU (1) | AU758333B2 (en) |
CA (1) | CA2312909C (en) |
GB (1) | GB2347047B (en) |
MY (1) | MY122125A (en) |
NZ (1) | NZ504450A (en) |
WO (1) | WO1999029124A1 (en) |
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-
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- 1998-11-24 MY MYPI98005320A patent/MY122125A/en unknown
- 1998-11-27 GB GB0013646A patent/GB2347047B/en not_active Expired - Lifetime
- 1998-11-27 CA CA002312909A patent/CA2312909C/en not_active Expired - Lifetime
- 1998-11-27 AU AU15804/99A patent/AU758333B2/en not_active Expired
- 1998-11-27 NZ NZ504450A patent/NZ504450A/en not_active IP Right Cessation
- 1998-11-27 WO PCT/SE1998/002172 patent/WO1999029124A1/en active IP Right Grant
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WO2000019694A2 (en) * | 1998-09-25 | 2000-04-06 | Telefonaktiebolaget Lm Ericsson (Publ) | A method and apparatus for transmitting signalling information between signalling points via internet protocol (ip) based network |
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US7054326B1 (en) | 1998-12-04 | 2006-05-30 | Telefonakitebolaget Lm Ericsson (Publ) | Method and apparatus for a signalling message transport mechanism |
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US6529524B1 (en) | 1999-01-13 | 2003-03-04 | Nortel Networks Limited | Computer program products, methods, and protocol for interworking services between a public telephone network, intelligent network, and internet protocol network |
US6611533B1 (en) | 1999-01-13 | 2003-08-26 | Nortel Networks Limited | Public telephone network, intelligent network, and internet protocol network services interworking |
AU773816B2 (en) * | 1999-06-14 | 2004-06-10 | Mci Worldcom, Inc. | Internet protocol transport of PSTN-to-PSTN Telephony Services |
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WO2001008424A1 (en) * | 1999-07-21 | 2001-02-01 | Telefonaktiebolaget Lm Ericsson (Publ) | Multimedia communication system |
WO2001041476A1 (en) * | 1999-11-30 | 2001-06-07 | Swisscom Mobile Ag | Method and device for connecting communication networks |
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WO2002021857A1 (en) * | 2000-09-05 | 2002-03-14 | Telefonaktiebolaget Lm Ericsson (Publ) | Call looping prevention |
WO2002051095A3 (en) * | 2000-12-18 | 2003-02-27 | Ericsson Telefon Ab L M | Signaling transport protocol extensions for load balancing and server pool support |
WO2002051095A2 (en) * | 2000-12-18 | 2002-06-27 | Telefonaktiebolaget L M Ericsson (Publ) | Signaling transport protocol extensions for load balancing and server pool support |
US6826198B2 (en) | 2000-12-18 | 2004-11-30 | Telefonaktiebolaget Lm Ericsson (Publ) | Signaling transport protocol extensions for load balancing and server pool support |
US7164693B2 (en) | 2000-12-18 | 2007-01-16 | Telefonaktiebolaget Lm Ericsson (Publ) | Signaling transport protocol extensions for load balancing and server pool support |
Also Published As
Publication number | Publication date |
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NZ504450A (en) | 2003-05-30 |
AU1580499A (en) | 1999-06-16 |
CA2312909C (en) | 2009-10-06 |
US6178181B1 (en) | 2001-01-23 |
GB2347047B (en) | 2002-11-20 |
AU758333B2 (en) | 2003-03-20 |
GB0013646D0 (en) | 2000-07-26 |
MY122125A (en) | 2006-03-31 |
CA2312909A1 (en) | 1999-06-10 |
GB2347047A (en) | 2000-08-23 |
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