GB2351414A - Call set-up in a telecommunications network - Google Patents

Call set-up in a telecommunications network Download PDF

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Publication number
GB2351414A
GB2351414A GB9914654A GB9914654A GB2351414A GB 2351414 A GB2351414 A GB 2351414A GB 9914654 A GB9914654 A GB 9914654A GB 9914654 A GB9914654 A GB 9914654A GB 2351414 A GB2351414 A GB 2351414A
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United Kingdom
Prior art keywords
signalling point
terminating
originating
speech codec
codec
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB9914654A
Other versions
GB9914654D0 (en
Inventor
Mark Hollis
Stephen Terrill
Christian Groves
Leslie Graf
Juan Noguera
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Priority to GB9914654A priority Critical patent/GB2351414A/en
Publication of GB9914654D0 publication Critical patent/GB9914654D0/en
Priority to ES00931177T priority patent/ES2317837T3/en
Priority to ES08168896T priority patent/ES2375304T3/en
Priority to PCT/EP2000/004229 priority patent/WO2000070885A1/en
Priority to CN008104816A priority patent/CN1361994B/en
Priority to EP08168896A priority patent/EP2043375B1/en
Priority to AU49197/00A priority patent/AU4919700A/en
Priority to DE60041131T priority patent/DE60041131D1/en
Priority to EP00931177A priority patent/EP1179264B1/en
Priority to CN2010101570358A priority patent/CN101917745B/en
Priority to JP2000619212A priority patent/JP4763136B2/en
Priority to US09/573,500 priority patent/US6671367B1/en
Publication of GB2351414A publication Critical patent/GB2351414A/en
Priority to US10/686,226 priority patent/US7292687B2/en
Priority to JP2011068582A priority patent/JP5118757B2/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • 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
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/2281—Call monitoring, e.g. for law enforcement purposes; Call tracing; Detection or prevention of malicious calls
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13034—A/D conversion, code compression/expansion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13098—Mobile subscriber
    • 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
    • H04Q2213/13196—Connection circuit/link/trunk/junction, bridge, router, gateway
    • 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
    • H04Q2213/13339—Ciphering, encryption, security
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13345—Intelligent networks, SCP
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/1338—Inter-exchange connection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13389—LAN, internet
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/18—Service support devices; Network management devices
    • H04W88/181—Transcoding devices; Rate adaptation devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A method of setting-up a speech call connection in a telecommunications system where the Call Control protocol is independent of the transport mechanism. The method comprises negotiating a first speech codec between an originating signalling point of the system and a first terminating signalling point. A call connection is then established over the transport mechanism between the originating signalling point and said first terminating signalling point in dependence upon said first speech codec. Subsequently, a second, different speech codec is negotiated between said first terminating signalling point and a second, new terminating signalling point. This new codec is notified to the originating signalling point and a call connection established between the originating signalling point and said second terminating signalling point where said first originating signalling point acts as an intermediate signalling point and wherein the first mentioned call connection is modified if necessary to support said second speech codec.

Description

2351414 CALL SET-UP IN A TELECOMMUNICATIONS NETWORK
Field of the Invention
The present invention relates to call set-up in a telecommunications network and in particular to that part of a call set-up process which relates to speech codec negotiation.
Backp-round to the invention Telecommunications networks currently rely to a large extent upon the Signalling System no.7 (SS7) as the mechanism for controlling call connections and for handling the transfer of signalling information between signalling points of the networks. Typically, one or more application and user parts at a given signalling point will make use of SS7 to communicate with peer application and user parts at some other signalling point. Examples of user parts are ISUP (ISDN User Part) and TUP (Telephony User Part) whilst examples of application parts are INAP (Intelligent Network Application Part) and MAP (Mobile Application Part). The conventional SS7 protocol stack includes Message Transfer Parts MTP1, MTP2, and MTP3 which handle the formatting of signalling messages for transport over the physical layer as well as various routing fimctions.
There has been considerable interest of late amongst the telecommunications community in using non-standard (i.e. non-conventional within the telecommunications industry) bearer transport mechanisms (nonSTMs) in telecommunications networks for carrying user plane data, e.g. voice signals. The reasons for this are related both to improvements in efficiency as well as potential cost savings. Much consideration has been given for example to the use of Internet Protocol (1P) networks to transport user plane information between network nodes. IP networks have the advantage that they make efficient use of transmission resources by using packet switching and are relatively low in cost due to the widespread use of the technology (as opposed to 2 specialised telecommunication technology). There is also interest in using other transport mechanisms including AAL1/2/5, FR etc.
Typically, the bearer transport mechanism protocol layers lie beneath SS7, and the standard ISUP which deals with the setting-up and control of call connections in a telecommunications network is closely linked to the current standard bearer transport mechanism. ISUP does not readily lend itself to use with other non-standard bearer transport technologies such as IP and AAL2. As such, several standardisation bodies including the ITUT, ETSI, and ANSI, are currently considering the specification of a protocol for the control of calls, which is independent of the underlying bearer transport mechanism. This can be viewed as separating out from the protocol, bearer control functions which relate merely to establishing the parameters (including the start and end points) of the "pipe" via which user plane data is transported between nodes, and which are specific to the transport mechanism. The new protocol, referred to as Transport Independent Call Control (TICC), retains call control ftinctions such as the services invoked for a call between given calling and called parties (e.g. call forwarding), and the overall routing of user plane data. Figure I a illustrates the conventional integrated Call Control and Bearer Control structure of ISUP whilst Figure lb illustrates the proposed new separated structure.
Mobile core networks are one of the main architectures in which non-STM transport technologies are likely to be deployed, i.e. a major custumer for the TICC protocol. Digital mobile telephones are generally capable of encoding and decoding speech data for the purposes of improved speech quality and efficient use of transport resources. The telephones may be capable of using one of a small number of speech codecs. Thus, mobile Core Networks (CNs) will require codec negotiation procedures to be included in the TICC protocol. These codec negotiation capabilities will allow mobile core networks to avoid the need for the transcoding of speech (i.e. the translation of speech data from one coding type to another) for most mobile-to-mobile calls, requiring transcoding only at the edges of mobile CNs (i.e. at interface nodes to legacy networks such as PSTNs, ISDNs, etc) for mobile to fixed-line terminal calls. The avoidance of transcoding from a compressed speech format (e.g. GSM-EFR, ACELP) to PCM (ITU- 3 T G.71 1) is desireable as transcoding significantly reduces speech quality. Also, compressed speech requires less bandwidth than PCM (e.g. 12.2Kbps for GSM-EFR versus 64Kbps for PCM).
With the, proposed new architecture of Figure lb, where the Call Control protocol is independent of the transport mechanism, codec negotiation must be performed by TICC for a call before a user plane transport connection is established for this call. The reason is that the amount of transport resources required to support a call depends on the codec selected for this call (i.e. on the outcome of the codec negotiation procedure). In some cases, a codec is initially selected for a call but, due to a change in circumstances, this codec must be changed for a new codec in a later phase of the call. Two important situations where this arises are the following:
1) Interactions with Intelligent Network (IN) services for the purpose of providing anouncements; and redirection of calls to a called party either authomatically or based on input from the calling party. A first codec must be selected to provide the announcements. Later the call is forwarded/redirected to another party and a second codec is used.
2) Call Forwarding on No-Reply (CFNR) which is a so-called supplementary service. A first codec is negotiated between A and B parties following which the call is forwarded to a C party because B fails to answer in a predefined time. A second codec is required based upon the requirements of party C.
Summga of the Present Invention.
The inventors of the present invention have recognised that, in both of the cases 1) and 2) above, as well as in other related situations, a call connection must be established over the transport mechanism in dependence upon the first selected codec, to carry announcement, tones, etc. When the codec is subsequently changed, the call connection may need to be modified to support the new codec.
4 According to a first aspect of the present invention there is provided a method of setting-up a speech call connection in a telecommunications system where the Call Control protocol is independent of the bearer transport mechanism, the method comprising: negotiating a first speech codec between an originating signalling point of the system and a first terminating signalling point; establishing a call connection over the transport mechanism between the originating signalling point and said first terminating signalling point in dependence upon said first speech codec; subsequently negotiating a second, different speech codec between said first terminating signalling point and a second, new terininating signalling point; notifying the originating signalling point of the second speech codec; and establishing a call connection between the originating signalling point and said second tenninating signalling point wherein said first originating signalling point acts as an intermediate signalling point and wherein the first mentioned call connection is modified if necessary to support said second speech codec.
It will be appreciated that embodiments of the present invention enable the smooth transfer of a call connection between different terminating signalling points, by modifying the connection between the originating signalling point and the original terminating signalling point to reflect the new codec. The final end-to-end connection is completed by establishing a connection between the original terminating signalling point and the new terminating signalling point based upon the new codec. Preferably, this latter connection is established after the first connection is modified, although this need not be the case.
It will also be appreciated that the method of the present invention is only applicable when the speech codec negotiation between the original terminating signalling point and the final terminating signalling point does not result in the first speech codec. If the result is the first speech codec, then there may be no need to modify the original connection.
Preferably, the step of notifying the originating signalling point of the second speech codec comprises sending an appropriate Call Control (CC) message from the original terminating signalling point to the originating signalling point. This CC message may be a Modify.request message.
Preferably, the Call Control protocol is a Transport Independent Call Control (TICC) protocol.
The present invention is applicable to the evolution of existing telecommunication network such as mobile networks based on GSM, DANDS, PDC, etc, as well as to future generation networks such as LJN4TS.
According to a second aspect of the present invention there is provided a telecommunications system in which the Call Control protocol is independent of the bearer transport mechanism, the system comprising: means for negotiating a first speech codee between an originating signalling point of the system and a first terminating signalling point; means for establishing a call connection over the transport mechanism between the originating signalling point and said first terminating signalling point in dependence upon said first speech codec; means for subsequently negotiating a second, different speech codec between said first terminating signalling point and a second, new terminating signalling point; means for notifying the originating signalling point of the second speech codec; and means for establishing a call connection between the originating signalling point and said second terminating signalling point wherein said first originating signalling point acts as an intermediate signalling point and wherein the first mentioned call connection is modified if necessary to support said second speech codec.
According to a third aspect of the present invention there is provided a signalling point of a telecommunications network in which the Call Control protocol is independent of the bearer transport mechanism, the signalling point comprising:
6 processing means for negotiating a first speech codec with a first terminating signalling point; means for establishing a call connection over the transport mechanism between the originating signalling point and said first terminating signalling point in dependence upon said first speech codec; means for receiving a notification of a second speech codec which has been negotiated between said first terminating signalling point and a second, new terminating signalling point; and means for modifying the first mentioned call connection if necessary to support said second speech codec.
Brief Description of the Drawings
Figure la shows in block diagram form the architecture of a conventional telecommunications network; Figure I b shows in block diagram form a network architecture in which the Call Control protocol is independent of the transport mechanism; and Figure 2 illustrates a signalling sequence in the network of Figure 2 for the purpose of setting up a speech call connection.
Detailed Description of Certain Embodiments
The proposed separation of the Call Control (CC) protocol and the Bearer Control (BC) protocol in future telecommunications standards, such as the Universal Mobile Telecommunications Standard (UMTS) has been described above with reference to Figures la and lb. For the purpose of the following discussion, the architecture of Figure lb is considered and it may be assumed that the transport mechanism (BC layer) is an IP network or the like, possibly having a number or routers located between signalling points or nodes.
There will now be described with reference to Figure 2 a signalling process for use in networks using the TICC protocol and which is capable of establishing an end-to-end Z-> 7 telephone connection for a speech call, where the call originates from an originating signalling point Node A and is initially directed to a first node Node B or signalling point. The call is subsequently routed to some other terminating signalling point Node C. The illustrated process relates specifically to the invoking of an IN service, where a calling party is initially connected to an IN network node which plays a pre- recorded message to the calling party before routing the call to a final terminating signalling point, or to a CFNR service, where a call is forwarded to a new terminating signalling point after the called party, connected to the initial terminating signalling point, fails to answer the call.
The signalling sequence comprises the following sequential steps:
1. Node A establishes a call to node B. Codec X is selected for this call.
2. A transport connection with appropriate transport resources for the selected codec is set up between nodes A and B. 3. Node B forwards/redirects the call to node C. Node C does not support codec X and selects codec Y.
4. Node B requests Node A to modify the codec choice for this call from codec X to codec Y.
5. If needed, the transport connection between Node A and Node B is modified to suit codec Y. Figure 2 illustrates both the case where the modification to the transport connection is made in the forward direction and the alternative case where the modification is made in the backward direction.
6. A transport connection suitable for codec Y is established between Nodes B and C.
7. TICC completes the call establishment (TICC ACM + TICC ANM).
TICC is ISUP based, therefore the signalling message names are taken from ISUP. However, ISUP does not include codec negotiation or codec modification procedures so a new pair of TICC messages (TICC modify. request/confirm) is needed to provide codec modification capabilities.
8 It will be appreciated by the person of skill in the art that various modifications may be made to the above described embodiments without departing from the scope of the present invention. For example, whilst Figure 2 illustrates only that the modification made to the Node A to Node B transport connection may be made in either the forward or the backward direction, it will be appreciated that other transport connection modifications may also be made in either the forward or the backward direction. Also, the transport connections may be established in either the forward or backward direction.
The invention may be employed to establish a speech call connection between more than three signalling points or nodes. For example, one or more transit nodes may be present between the originating signalling point Node A and the original terminating signalling point Node B and/or between the original terminating signalling point Node B and the final ten-ninating signalling point Node C. It will also be appreciated that the call may be further transferred or relayed from Node C to yet another signalling point (i.e. a Node D). This would involve a negotiation to determine whether codec Y is suitable for Node D, and if not a possible modification to the transport connection between Node A and Node B and between Node B and Node C. This process may be extended to any number of nodes.
9

Claims (6)

CLAIMS:
1. A method of setting-up a speech call connection in a telecommunications system where the Call Control protocol is independent of the transport mechanism, the method comprising: negotiating a first speech codec between an originating signalling point of the system and a first terminating signalling point; establishing a call connection over the transport mechanism between the originating signalling point and said first terminating signalling point in dependence upon said first speech codec; subsequently negotiating a second, different speech codec between said first terminating signalling point and a second, new terminating signalling point; notifying the originating signalling point of the second speech codec; and establishing a call connection between the originating signalling point and said second terminating signalling point wherein said first originating signalling point acts as an intermediate signalling point and wherein the first mentioned call connection is modified if necessary to support said second speech codec.
2. A method according to claim 1 and comprising modifying the first mentioned call connection and subsequently establishing a transport connection between the original terminating signalling point and the new terminating signalling point based upon the new codec.
3. A method according to claim I or 2 and comprising notifying the originating signalling point of the second speech codec by sending an appropriate Call Control (CC) message from the original terminating signalling point to the originating signalling point.
4. A method according to claim 3, wherein the Call Control protocol is a Transport Independent Call Control (TICC) protocol and said CC message is a Modify.request message.
5. A telecommunications system in which the Call Control protocol is independent of the transport mechanism, the system comprising: means for negotiating a first speech codec between an originating signalling point of the system and a first terminating signalling point; means for establishing a call connection over the transport mechanism between the originating signalling point and said first terminating signalling point in dependence upon said first speech codec; means for subsequently negotiating a second, different speech codec between said first terminating signalling point and a second, new terminating signalling point; means for notifying the originating signalling point of the second speech codec; and means for establishing a call connection between the originating signalling point and said second terminating signalling point wherein said first originating signalling point acts as an intermediate signalling point and wherein the first mentioned call connection is modified if necessary to support said second speech codec.
6. A signalling point of a telecommunications network in which the Call Control protocol is independent of the transport mechanism, the signalling point comprising: processing means for negotiating a first speech codec with a first terminating signalling point; means for establishing a call connection over the transport mechanism between the originating signalling point and said first tenninating signalling point in dependence upon said first speech codec; means for receiving a notification of a second speech codec which has been negotiated between said first tenninating signalling point and a second, new terminating signalling point; and means for modifying the first mentioned call connection if necessary to support said second speech codec.
GB9914654A 1999-05-17 1999-06-22 Call set-up in a telecommunications network Withdrawn GB2351414A (en)

Priority Applications (14)

Application Number Priority Date Filing Date Title
GB9914654A GB2351414A (en) 1999-06-22 1999-06-22 Call set-up in a telecommunications network
JP2000619212A JP4763136B2 (en) 1999-05-17 2000-05-09 Function negotiation in telecommunications networks
AU49197/00A AU4919700A (en) 1999-05-17 2000-05-09 Capability negotiation in a telecommunications network
EP00931177A EP1179264B1 (en) 1999-05-17 2000-05-09 Capability negotiation in a telecommunications network
PCT/EP2000/004229 WO2000070885A1 (en) 1999-05-17 2000-05-09 Capability negotiation in a telecommunications network
CN008104816A CN1361994B (en) 1999-05-17 2000-05-09 Capability negotiation system, apparatus and method in a telecommunications network
EP08168896A EP2043375B1 (en) 1999-05-17 2000-05-09 Capability negotiation in a telecommunications network
ES00931177T ES2317837T3 (en) 1999-05-17 2000-05-09 CAPACITY NEGOTIATION IN A TELECOMMUNICATIONS NETWORK.
DE60041131T DE60041131D1 (en) 1999-05-17 2000-05-09 NEGOTIATING SKILLS IN A TELECOMMUNICATIONS NETWORK
ES08168896T ES2375304T3 (en) 1999-05-17 2000-05-09 CAPACITY NEGOTIATION IN A TELECOMMUNICATIONS NETWORK.
CN2010101570358A CN101917745B (en) 1999-05-17 2000-05-09 Capability negotiation system, apparatus and method in a telecommunications network
US09/573,500 US6671367B1 (en) 1999-05-17 2000-05-16 Capability negotiation in a telecommunications network
US10/686,226 US7292687B2 (en) 1999-05-17 2003-10-15 Capability negotiation in a telecommunications network
JP2011068582A JP5118757B2 (en) 1999-05-17 2011-03-25 Function negotiation in telecommunications networks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9914654A GB2351414A (en) 1999-06-22 1999-06-22 Call set-up in a telecommunications network

Publications (2)

Publication Number Publication Date
GB9914654D0 GB9914654D0 (en) 1999-08-25
GB2351414A true GB2351414A (en) 2000-12-27

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GB9914654A Withdrawn GB2351414A (en) 1999-05-17 1999-06-22 Call set-up in a telecommunications network

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2385500A (en) * 2002-02-13 2003-08-20 Hewlett Packard Co Optimised message transfer protocol and system using such a protocol
EP1902381A2 (en) * 2005-07-11 2008-03-26 PacketVideo Corporation System and method for transferring data

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994006251A1 (en) * 1992-08-28 1994-03-17 Telefonaktiebolaget Lm Ericsson Network structure and a signalling protocol for a telecommunication network
US5420916A (en) * 1992-02-20 1995-05-30 Nec Corporation Signaling network having common signaling node for protocol conversion
GB2318701A (en) * 1996-10-26 1998-04-29 Ibm Intelligent network protocol gateway
GB2327560A (en) * 1997-05-21 1999-01-27 Kokusai Denshin Denwa Co Ltd Speech coding

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5420916A (en) * 1992-02-20 1995-05-30 Nec Corporation Signaling network having common signaling node for protocol conversion
WO1994006251A1 (en) * 1992-08-28 1994-03-17 Telefonaktiebolaget Lm Ericsson Network structure and a signalling protocol for a telecommunication network
GB2318701A (en) * 1996-10-26 1998-04-29 Ibm Intelligent network protocol gateway
GB2327560A (en) * 1997-05-21 1999-01-27 Kokusai Denshin Denwa Co Ltd Speech coding

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2385500A (en) * 2002-02-13 2003-08-20 Hewlett Packard Co Optimised message transfer protocol and system using such a protocol
GB2385500B (en) * 2002-02-13 2004-08-11 Hewlett Packard Co A method of optimising messaging or data transfer, and a system using such a method
EP1902381A2 (en) * 2005-07-11 2008-03-26 PacketVideo Corporation System and method for transferring data
EP1902381A4 (en) * 2005-07-11 2009-06-24 Packetvideo Corp System and method for transferring data
US9596468B2 (en) 2005-07-11 2017-03-14 Iii Holdings 2, Llc System and method for transferring data
US10045052B2 (en) 2005-07-11 2018-08-07 Iii Holdings 2, Llc System and method for transferring data

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