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WO2017114565A1 - Procédé, système et dispositifs permettant d'appliquer une réservation de ressources dans un réseau de communication multimédia à protocole internet (ip) - Google Patents

Procédé, système et dispositifs permettant d'appliquer une réservation de ressources dans un réseau de communication multimédia à protocole internet (ip) Download PDF

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Publication number
WO2017114565A1
WO2017114565A1 PCT/EP2015/081358 EP2015081358W WO2017114565A1 WO 2017114565 A1 WO2017114565 A1 WO 2017114565A1 EP 2015081358 W EP2015081358 W EP 2015081358W WO 2017114565 A1 WO2017114565 A1 WO 2017114565A1
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WO
WIPO (PCT)
Prior art keywords
pbx
packet gateway
gateway server
multimedia
server
Prior art date
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Ceased
Application number
PCT/EP2015/081358
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English (en)
Inventor
Rogier August Caspar Joseph Noldus
Pieter Van Rijnsoever
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
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Priority to PCT/EP2015/081358 priority Critical patent/WO2017114565A1/fr
Publication of WO2017114565A1 publication Critical patent/WO2017114565A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1053—IP private branch exchange [PBX] functionality entities or arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1016—IP multimedia subsystem [IMS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/80—Responding to QoS

Definitions

  • I P Internet Protocol
  • the present invention generally relates to a communication in an Internet Protocol, I P, multimedia communications network and, more specifically, to resource reservation in the multimedia communications network.
  • LTE data connection With the ever increasing speed of the LTE data connection, connecting multiple voice and/or video telephony lines for small and medium enterprises using LTE data connection gets more and more attractive. This applies especially in an urban area where it is costly to bring the appropriate wireline connection into the building. Connecting multiple voice and/or video telephony lines for small and medium enterprises using LTE data connection constitutes also competitive means to compete with the incumbent fixed broadband operators to deliver fast and flexible service.
  • a PBX device is a system that connects telephone extensions to a Public Switched Telephone Network, PSTN, and provides, for example, internal communication for a business.
  • An Internet Protocol, I P, PBX device is a PBX device with I P connectivity and may provide additional audio, video, or instant messaging communication utilizing the Transmission Control Protocol, TCP/I P protocol stack.
  • IP-PBX devices are typically connected to a public network by means of Session Initiation Protocol, SIP, trunking which is also known as Business Trunking.
  • SIP Session Initiation Protocol
  • An IP-PBX device has a wireline connection or a wireless connection to a gateway server of an I P multimedia communications network.
  • the IP-PBX devices are typically "non-registered", which implies that SI P signalling to and/or from the I P- PBX device is handled in the I P multimedia communications network as unregistered service, through, for example, a wildcard Public Service Identity, PSI .
  • PSI Public Service Identity
  • IP-PBX devices are generally accomplished through I P connectivity using the "internet" Access Point Name, APN .
  • This "internet” APN provides for a so called best effort for the quality of the connectivity. This implies that the bandwidth, latency, jitter and bit-error-rate, BER, of the mobile IP connectivity is subject to, for example, subscriber density, cell usage, backhaul capacity, etc.
  • a general problem with the existing solutions is that the quality of the connectivity is not guaranteed, i.e. it is associated with a best effort attempt.
  • SIP trunking offers the opportunity for operators to bundle data and voice/video telephony services in a single I P connection to IP-PBX devices.
  • a method of applying resource reservation for a multimedia communication channel between a packet gateway server comprised in an Internet Protocol, I P, multimedia communications network and an I P Private Branch Exchange, PBX, device comprises the step of receiving, by an Application Server, AS, comprised in said I P multimedia communications network, a request for establishing a communication session with said I P-PBX device, wherein said request comprises a unique identity of said I P-PBX device.
  • the above identified step is followed by the steps of instructing, by said AS, said packet gateway server via a charging and bearer policy server comprised in said I P multimedia communications network, to apply resource reservation for said multimedia communication channel based on said recognized unique identity of said IP-PBX, and applying, by said packet gateway server, said resource reservation for said multimedia communication channel between said IP-PBX device and said packet gateway server.
  • the method is based on the insight that an I P-PBX device connects to the multimedia communications network via a packet gateway server, and that the packet gateway server should receive instructions for resource reservation for the multimedia communication channel between the IP-PBX device and the packet gateway server.
  • the resource reservation for the multimedia communication channel ensures that, for example, call establishment with the IP-PBX occurs with a low latency, media like voice and/or video have better Quality-of-Service, a single subscription suffices for an IP-PBX device, supporting multiple simultaneous calls, whilst also allowing generic internet access.
  • the resource reservation may be tailored to the needs of the type of communication. For example, for voice calls other quality requirements for the multimedia communication channel are relevant as compared to a media communication session. Voice calls typically require low latency while the bandwidth setting for the voice call is typically low. Media communications sessions, however, typically require higher bandwidths, while the latency is usually of less importance.
  • the present method is directed to a connection between the IP-PBX device and the multimedia communications network. As such, the present invention is related to 'non-registered' connections. This implies that signalling to and/or from the IP-PBX device is handled in the multimedia communications network as unregistered service, through, for example, wildcard Public Service Identities, PSI's.
  • the Application Server can recognize that the request for establishing a communication session is initiated by, or intended for, the IP-PBX device by detecting the unique identity in the received request.
  • the application server is able to recognize that the unique identity is to, and/or from, a device that is unregistered to the multimedia communications network.
  • the AS may instruct, via the charging and bearer policy server, the packet gateway server to apply specific resource reservation for the multimedia communication channel.
  • the unique identity is, for example, a domain name, an E.164 number, a Unique Resource Identifier, URI , a phone number or the like.
  • the I P-PBX device may be an end user device or may be directed to a router type of device to which one or more IP-PBX end user devices are connected. The latter will be explained in more detail with reference to one of the examples of the invention.
  • the multimedia communications network is often referred to as the IP Multimedia Subsystem, I MS, network as specified by 3GPP.
  • I MS IP Multimedia Subsystem
  • Other types of multimedia communications networks are however also covered by the wording of the claims as appended, such as an Evolved Packets System, EPS, network, a Universal Mobile Telecommunications System, UMTS, network and a General Packet Radio Service, GPRS, network.
  • the resource reservation may be directed to any of latency, jitter, bandwidth, bit-error-rate, etc.
  • the step of applying said resource reservation for said multimedia communication channel comprises establishing, by said packet gateway server, at least two bearers over said multimedia communication channel between said packet gateway server and said IP-PBX device, wherein each of said at least two bearers is associated with different Quality-of-Service requirements.
  • the AS and/or the charging and bearer policy server could decide to set up two or more specific bearers between the IP-PBX device and the multimedia communications network, each of which having different Quality-of-Service, QoS, requirements, such that each of these bearers can effectively be used for a type of service required by the end user of the IP-PBX. For example, in the case of a voice call, a different bearer is used in comparison with a data connection used for, for example, a video call.
  • the different bearers could be associated with a Quality-of-Service Class Identifier, QCI , 1 - 9.
  • QCI may be a mechanism used in 3GPP Long Term Evolution networks to ensure bearer traffic is allocated appropriate Quality of Service. Different bearer traffic requires different QoS and therefore different QCI values, with 9 different QCI values currently specified.
  • QoS parameters examples include Guaranteed Bit Rate (GBR) or non-Guaranteed Bit Rate (non-GBR), Priority Handling, Packet Delay Budget and Packet Error Loss rate.
  • GBR Guaranteed Bit Rate
  • non-GBR non-Guaranteed Bit Rate
  • Priority Handling Packet Delay Budget
  • Packet Error Loss rate Packet Error Loss rate.
  • QCI Packet Error Loss rate
  • the QoS concept as used in LTE networks is class-based, where each bearer type is assigned one QCI by the multimedia communications network.
  • the QCI is a scalar that is used within the access network as a reference to node specific parameters that control packet forwarding treatment, for example scheduling weight, admission thresholds and link- layer protocol configuration.
  • QCI values are standardized and associated with QCI characteristics, in term of packet forwarding treatment that the bearer traffic receives edge-to-edge between the end user, in the present case for example the IP-PBX device, and the packet gateway server.
  • Scheduling priority, packet delay budget and packet error loss rate are the set of characteristics defined by the 3GPP standard and they should be understood as guidelines for the pre- configuration of node specific parameters to ensure that applications/services mapped to a given QCI receive the same level of QoS in multi-vendor environments as well as in roaming scenarios.
  • the QCI characteristics are not signalled on any interface.
  • each of these different CQI values may be used for the resource reservation.
  • the unique identity of the IP-PBX device is stored in a Home Subscriber Server, HSS, comprised by the multimedia communications network.
  • HSS Home Subscriber Server
  • MME Management Entity, comprised in said multimedia communications network, a request from said IP-PBX device, retrieving, by said MME, said unique identity from said HSS, and forwarding, by said MME, said request towards said application server.
  • the advantage of this example is that the unique identity of the I P-PBX device is stored, and maintained, centrally.
  • the MME could further retrieve the unique identity from the HSS using Diameter messages, wherein said diameter messages comprise any of a domain name and an I P address of said IP-PBX device, and wherein said HSS is arranged to provide said unique identity based on any of said domain name and said I P address comprised in said diameter messages.
  • the multimedia communication channel is between said packet gateway server and an Integrated Access Device, IAD, said IAD being integrated in said Internet Protocol, I P, Private Branch Exchange, PBX device, said IAD being arranged for serving a plurality of I P PBX's, wherein said plurality of I P PBX's could be single User Equipment,
  • the method comprises the step of aggregating, by said IAD, connectivity requirements for each of said PBX's to said packet gateway server using said multimedia communication channel.
  • IP-PBX device which is used as a sort of router. That is, multiple end user IP-PBX's are connected to the IP-PBX device, more specifically the IAD, and the IAD has a functional connection to the multimedia communications network.
  • the insight of the inventor that the deployment of multiple bearers between the IAD and the multimedia communications network, each of which having its own quality requirements, is especially beneficial in case multiple IP-PBX's are connected to the IAD.
  • the advantage hereof is that each IP-PBX is able to use a single dedicated bearer for its data and/or voice communication.
  • the invention provides for a method of instructing a packet gateway server comprised in an I P multimedia communications network to apply resource reservation for a multimedia communication channel between said packet gateway server and an Internet Protocol, I P, Private Branch Exchange, PBX device.
  • the method comprises the steps of receiving, by an Application Server, AS, comprised in said I P multimedia communications network, a request for establishing a communication session with said I P-PBX device, wherein said request comprises a unique identity of said IP-PBX device, and instructing, by said AS, said packet gateway server via a charging and bearer policy server comprised in said multimedia communications network, to apply resource reservation in said packet gateway server for said multimedia communication channel based on said recognized unique identity of said I P-PBX.
  • AS Application Server
  • the Application Server could be used as the key server node in the multimedia communications network for connecting the IP-PBX device to the communication network. That is, the AS is able to recognize that the communication session is with the I P-PBX device, and, as a result thereof, is able to instruct the packet gateway server, via a charging and bearer policy server comprised in the multimedia communications network to apply resource reservation in the packet gateway server for the multimedia communication channel based on the recognized unique identity of the I P-PBX.
  • the AS may thus be adapted such that it is able to obtain the unique identity of the IP-PBX from the request, and to recognize that that unique identity is coupled to an unregistered device, for example an unregistered I P-PBX.
  • the step of instructing comprises instructing said packet gateway server to establish at least two bearers over said multimedia communication channel between said packet gateway server and said I P-PBX device, wherein each of said at least two bearers is associated with different Quality-of-Service requirements.
  • the invention provides for an Application Server, AS, arranged for instructing a packet gateway server comprised in an I P multimedia communications network to apply resource reservation for a multimedia communication channel between said packet gateway server and an Internet Protocol, I P, Private Branch Exchange, PBX device.
  • AS Application Server
  • I P Internet Protocol
  • PBX Private Branch Exchange
  • the AS comprises receive equipment arranged for receiving a request for establishing a communication session with said IP-PBX device, wherein said request comprises a unique identity of said IP-PBX device, and instruct equipment arranged for instructing said packet gateway server, via a charging and bearer policy server comprised in said multimedia communications network, to apply resource reservation in said packet gateway server for said multimedia communication channel based on said recognized unique identity of said IP-PBX.
  • the instruct equipment is further arranged for instructing said packet gateway server to establish at least two bearers over said multimedia communication channel between said packet gateway server and said I P- PBX device, wherein each of said at least two bearers is associated with different Quality-of-Service requirements.
  • a Home Subscriber Server arranged for operation in an Internet Protocol, I P, multimedia communication network
  • said Home Subscriber Server comprising receive equipment arranged for receiving an Update Location Request, ULR, message from a Mobility Management Entity, MME, said message comprising any of a domain name and an address of an Internet Protocol, IP, Private Branch Exchange, PBX, determine equipment arranged for determining a unique identity, comprised by said HSS, using any of said domain name and said address, and send equipment arranged for sending an Update Location Answer, U LA to said MME, said message comprising said unique identity.
  • a non-transitory computer-readable storage medium comprising instructions which, when executed on at least one processor, cause the at least one processor to carry out the method according to any of the examples as provided above.
  • an Internet Protocol I P, multimedia communication network arranged for applying resource reservation for a multimedia communication channel between a packet gateway server, comprised in said I P multimedia communications network, and an Internet Protocol, I P, Private Branch Exchange, PBX, device.
  • the communication network further comprises an Application Server,
  • AS comprising receive equipment arranged for receiving a request for establishing a communication session with said IP-PBX device, wherein said request comprises a unique identity of said IP-PBX device, and instruct equipment arranged for instructing said packet gateway server, via a charging and bearer policy server comprised in said I P multimedia communications network, to apply resource reservation in said packet gateway server for said multimedia communication channel based on said recognized unique identity.
  • the packet gateway server is arranged for applying said resource reservation for said multimedia communication channel between said I P-PBX device and said packet gateway server.
  • an Application Server, AS arranged for instructing resource reservation for a multimedia communication channel between a packet gateway server comprised in an I P multimedia communications network and an Internet Protocol, I P, Private Branch Exchange, PBX, device.
  • the AS comprises a receive module for receiving a request for establishing a communication session with said I P-PBX device, wherein said request comprises a unique identity of said IP-PBX device, and an instruct module for instructing said packet gateway server, via a charging and bearer policy server comprised in said I P multimedia communications network, to apply resource reservation in said packet gateway server for said multimedia communication channel based on said recognized unique identity.
  • the AS may comprise process equipment arranged for recognizing that said request is from said IP-PBX device by detecting said unique identity in said request.
  • a Home Subscriber Server arranged for operation in an Internet Protocol, I P, multimedia communication network
  • said Home Subscriber Server comprising a receive module for receiving an Update Location Request, U LR, message from a Mobility Management Entity, MME, said message comprising any of a domain name and an address of an Internet Protocol, IP, Private Branch Exchange, PBX, determine module for determining a unique identity, comprised by said HSS, using any of said domain name and said address, and a send module for sending an Update Location Answer, ULA to said MME, said message comprising said unique identity.
  • FIG. 1 is a schematic diagram illustrating an embodiment of an access network of the Internet Protocol, I P, multimedia communication network.
  • FIG. 2 is a detailed schematic diagram illustrating an embodiment of an access network of the Internet Protocol, I P, multimedia communication network.
  • Figure 3 is a block diagram illustrating an embodiment of an I P-PBX device.
  • Figure 4 is a block diagram illustrating another embodiment of an I P-PBX device.
  • Figure 5 is a block diagram illustrating an embodiment of an Application Server.
  • FIG. 6 is a block diagram illustrating an embodiment of a Home Subscriber Server, HSS.
  • Figure 7 is a schematic diagram illustrating an embodiment of the method steps.
  • Figure 8 is a signalling diagram illustrating an exchange of signals in an embodiment of the method. Detailed description
  • FIG. 1 is a schematic diagram illustrating an access network 1 of an embodiment of the Internet Protocol, I P, multimedia communication network.
  • the functional devices shown in Figure 1 as well as the description here below are related to devices as known in an Internet Protocol, I P, Multimedia Subsystem network.
  • the charging and bearer policy server shown in the form of a Policy and Charging Rules Function, PCRF, device 6 is an embodiment of the generic function to control charging and bearer policy in the packet gateway server 4.
  • the Subscription Profile Repository, SPR, 7 is an embodiment of a Policy and Charging subscription database.
  • the Packet Data Network Gateway, PDN-Gw, 4 is an embodiment of the generic packet gateway server.
  • the example shown in figure 1 does not exclude the applicability of the method of the invention in other implementations of I P multimedia communications network.
  • the communication network shows a preferred allocation of functional entities to devices, i.e. nodes.
  • devices i.e. nodes.
  • different functional entities may be combined in a single device.
  • a particular functional entity may also be installed in multiple devices.
  • the I P Private Branche Exchange, PBX, device 2 intends to connect to the multimedia communications network via the PDN- Gw 4.
  • the focus is directed to the access network of the communications network.
  • the PCRF device 6 is responsible for determining, in real-time, policy rules in a multimedia communications network. As such, the PCRF device 6 typically plays a central role in next-generation networks. Unlike earlier policy engines that were added onto an existing network to enforce policy, the PCRF device 6 operates at the network core and accesses subscriber databases, like the SPR 7 and other specialized functions, such as a charging system, in a centralized manner.
  • the PCRF device 6 is the part of the network architecture that aggregates information to and from the network, operational support systems, and other sources in real time, supporting the creation of rules and then automatically making policy decisions for each registered and non-registered subscriber in the network.
  • the multimedia communications network offers multiple services, Quality of Service, QoS, levels, and charging rules.
  • the communication signaling in a multimedia communications network is divided in a control plane 8 architecture and user plane 9 architecture.
  • the user plane 9 carries the network user traffic and the control plane 8 handles communication session control functionality.
  • the access network further comprises a Diameter Routing Agent device, DRA, 5 which is a functional element in a third generation or fourth generation network, such as a Long Term Evolution, LTE, network that provides real-time routing capabilities to ensure that messages are routed to the correct element in a network.
  • DRA Diameter Routing Agent device
  • LTE Long Term Evolution
  • the access node of the access network for example LTE, is a Radio Base Station, RBS, also known as eNodeB, depending on the technology applied.
  • RBS Radio Base Station
  • the IP-PBX device 2 is provisioned in a Home Subscriber Server, HSS, 12 as a subscriber in the multimedia communications network.
  • the subscription of the I P-PBX does typically not comprise a single E.1 64 number but another type of subscriber entity, for example an Uniform Resource Identifier, U RI .
  • the Mobility Management Entity, MME, 1 1 receives subscriber information from the HSS 12.
  • the information is typically contained in an Update Location Answer, U LA, message.
  • U LA Update Location Answer
  • One parameter normally contained in the ULA is the Mobile Station International Subscriber Directory Number, MSISDN.
  • MSISDN Mobile Station International Subscriber Directory Number
  • the U LA may contain a subscriber identity instead of an MSISDN, for the purpose of the IP-PBX attachment procedure to the multimedia communications network. This identity may have the form of a domain name, rather than an E.164 number.
  • the IP-PBX device identity is used in the functional signalling between the MME, the Serving Gateway, S-Gw, 13 the PDN-Gw 4 and the PCRF device 6.
  • the above-described requirement entails that the information flow between the MME 1 1 and HSS 12, specifically the Diameter messages that carry the subscriber identity, need to be capable of identifying the subscriber, i.e. the IP-PBX device 2, through a domain name, as opposed to through a phone number, for example an MSISDN or an E.164 number.
  • an Application Server receives a request for establishing a communication session with the I P-PBX device 2, wherein the request comprises a unique identity of the I P-PBX device 2, for example the domain name.
  • the AS then recognizes the IP-PBX device 2. That is, the AS recognizes that the request is initiated from, or directed towards, a device which is not registered within the multimedia communications network.
  • the AS then instructs, the PDN-Gw 4, via the PCRF device 6, to apply resource reservation for the multimedia communication channel 3 based on the recognized unique identity of the IP-PBX device 2.
  • the PDN-Gw 4 will then apply the resource reservation for the multimedia communication channel 3 between the I P-PBX device 2 and the PDN-Gw 4.
  • the advantage of the method as described above is that the I P-PBX device 2 may gain LTE I P connectivity as a regular LTE subscriber.
  • FIG. 2 is a detailed schematic diagram illustrating an embodiment of an access network 101 of the Internet Protocol, I P, multimedia communication network.
  • the IP-PBX device 2 uses the IP connectivity it has obtained from the network in accordance with figure 1 , whenever a voice call is established with the IP-PBX device 2.
  • a request for establishing a communication session for example a Session Initiation Protocol, SI P, request, arrives at the SI P trunking Application Server, ST-AS 108.
  • the Interconnection Border Control Functions device 109 through which the call is routed, reserves a through connection in the Transition Gateway, TrGw, 1 10.
  • the Service Data Flow, SDF, 102, 103, 104 that will be used for the user plane of this call is not yet established.
  • the IP-PBX device 2 has not yet received an updated Traffic flow template, TFT, indicating to the IP-PBX device 2 which bearer shall be used for this flow.
  • TFT Traffic flow template
  • the ST-AS 108 could create a Quality-of-Service Class Identifier 1 , QCI 1 , SDF 102, 103, 104 bearer 3 for the user plane of this call. More specifically, the ST-AS 108 instructs the PDN-Gw 4, via the PCRF device 6, to create a specific SDF 102, 103, 104.
  • the PCRF device 6 maps the SDF to a dedicated bearer 3 at the PDN-Gw 4.
  • the specific SDF may be multiplexed with other SDF's 102, 103, 104 on to the same dedicated bearer 3.
  • the ST-AS 108 hereto contacts the PCRF device 6 that is in control of the PDN-Gw 4 for this IP-PBX PDN Connection.
  • the PDN-Gw 4 selects a PCRF device 6.
  • the signalling between PDN-Gw 4 and the PCRF device 6 traverses a Diameter Routing Agent device, DRA, 5.
  • the DRA 5 keeps track of which PCRF device 6 is assigned to a certain user.
  • the ST-AS 108 is in this case taking the role of Application Function, AF. AF is the term to identify the functional entity that provides policy control towards the PDN-Gw 4, via PCRF device 6.
  • the DRA 5 (or alternatively DRA
  • the IP-PBX device 2 does not register in the I MS network, we may still use a Wildcard I P Multimedia Public Identity, W-IMPU, for identifying the user.
  • W-IMPU Wildcard I P Multimedia Public Identity
  • the ST-AS 108 uses the W-I MPU for signalling towards the DRA 5.
  • the ST-AS 108 can hence instruct the PDN-Gw 4, via the PCRF device 6, to establish the required SDF 102, 103, 104 for the call.
  • the ST-AS 108 keeps track of the concurrent number of SDFs 102, 103, 104, and mapping to dedicated EPS bearer(s) 3, for this I P-PBX device 2 and could limit this number to a designated maximum. This practically limits the number of simultaneous calls that can be established with the I P-PBX device 2.
  • Figure 3 is a block diagram illustrating an embodiment of an I P-PBX device 2. Here, two variants are depicted which are both capable of being deployed in a method according to the present invention.
  • Both of the IP-PBX devices shown in figure 3 comprise a mobile connectivity module 206, 207, and an IP-PBX application 208, 209.
  • the IP-PBX device shown on the left side of figure 3 comprises a Universal Serial Bus, USB, stick 204, which provides an Application Programming Interface, API .
  • the mobile connectivity module 207 in the IP-PBX device comprises application software for the mobile connectivity. More specifically, it separates the IP-PBX application software from the mobile connectivity.
  • the API offered by the USB stick 204 offers the capability to establish a PDN connection to the IMS APN as referred to here above, and comprises the functionality to receive an indication from the MME that a dedicated bearer has been established.
  • This functionality includes also the receiving of traffic flow templates, TFT, which indicates to the mobile connectivity module 207 which bearer shall be used for a specific application, such as a media session or a signalling session.
  • the IP-PBX device may comprise a built-in LTE modem, which provides the same capability as the USB stick 204.
  • the advantage of the IP-PBX device according to the present invention is that the IP-PBX devices are allowed to receive mobile I P connectivity through LTE, including Quality-of-Service for voice as well as video communication.
  • FIG. 4 is a block diagram illustrating another embodiment of an IP-PBX device 301 .
  • the IP-PBX device 301 acts as a sort of router type.
  • the IP-PBX device 201 comprises an Integrated Access Device, IAD, 302, which IAD 302 is arranged for aggregating 301 connectivity requirements for each of said PBX's 303, 304, 305, 306 to the packet gateway server using a multimedia communication channel.
  • IAD Integrated Access Device
  • the IAD 302 serves a multitude of phone connections, i.e. PBX's 303, 304, 305, 306, but the IAD 302 itself comprises merely a single Universal Integrated Circuit Card, UICC 307.
  • the IAD 302 comprises software for establishing mobile data connections, wherein each phone connection comprises software for supporting a single phone connection.
  • each IP-PBX 303, 304, 305, 306 constitutes a single entity from an I MS functional point of view.
  • the UICC 307 is related to a single subscription. Hence, a single connection between the IP-PBX device comprising the U ICC and the access network is established.
  • Figure 5 is a block diagram illustrating an embodiment of an Application Server, AS, 108 arranged for instructing a packet gateway server comprised in an I P multimedia communications network to apply resource reservation for a multimedia communication channel between said packet gateway server and an Internet Protocol, I P, Private Branch Exchange, PBX device.
  • AS Application Server
  • PBX Private Branch Exchange
  • the AS 108 comprises a control unit 406 and a memory 405, which control unit 406 is connected to process equipment 403, resource reservation module 404 receive equipment 401 and instruct equipment 408.
  • Incoming data packets or messages pass through the input terminal 402 before they reach the receive equipment 401 , or a receiving module.
  • Outgoing data packets or messages pass or are sent by the instruct equipment 408, or a instruct module, via the output terminal 407.
  • the receive equipment 401 is arranged for receiving a request for establishing a communication session with said I P-PBX device, wherein said request comprises a unique identity of said IP-PBX device.
  • the instruct equipment 408 is arranged for instructing the packet gateway server, via a charging and bearer policy server comprised in said I P multimedia communications network, to apply resource reservation in said packet gateway server for said multimedia communication channel based on said recognized unique identity of said IP-PBX device.
  • the recognized unique identity of the I P-PBX device forms the trigger for the AS 108 to instruct the packet gateway server.
  • the recognized unique identity is thus the deciding factor on whether the resource reservation is to be applied or not.
  • FIG. 6 is a block diagram illustrating an embodiment of a Home Subsriber Server, HSS 12, arranged for operation in an Internet Protocol, I P, multimedia communication network.
  • the HSS 12 comprises a control unit 506 and a memory 505, which control unit 506 is connected to determine equipment 503, unique identities table 504, receive equipment 501 and send equipment 508.
  • Incoming data packets or messages pass through the input terminal 502 before they reach the receive equipment 501 , or a receiving module.
  • Outgoing data packets or messages pass or are sent by the send equipment 508, or a send module, via the output terminal 507.
  • the HSS 12 comprises receive equipment 501 arranged for receiving an Update Location Request, ULR, message from a Mobility Management Entity, MME, said message comprising any of a domain name and an address of an Internet Protocol, I P, Private Branch Exchange, PBX.
  • the HSS 12 further comprises determine equipment 503 arranged for determining a unique identity, comprised by said HSS 12, using any of said domain name and said address.
  • the HSS 12 further comprises send equipment 508 arranged for sending an Update Location Answer, ULA to said MME, said message comprising said unique identity.
  • FIG. 7 is a schematic diagram illustrating an embodiment of the method steps 601 .
  • the method 601 is directed to applying resource reservation for a multimedia communication channel between a packet gateway server comprised in an Internet Protocol, I P, multimedia communications network and an I P Private Branch Exchange, PBX, device.
  • the method 601 comprises the steps of
  • an Application Server comprised in said I P multimedia communications network, a request for establishing a communication session with said I P-PBX device, wherein said request comprises a unique identity of said I P-PBX device;
  • said packet gateway server via a charging and bearer policy server comprised in said I P multimedia communications network, to apply resource reservation for said multimedia communication channel based on said recognized unique identity of said I P-PBX, and
  • Figure 8 is a signalling diagram illustrating an exchange of signals
  • the method starts by the IP-PBX device 2 sending a request for establishing a communication session, i.e. SI P Invite message 704, over a default EPS bearer 702 established between the PND-Gw 4 and the IP- PBX device 2.
  • a request for establishing a communication session i.e. SI P Invite message 704
  • a default EPS bearer 702 established between the PND-Gw 4 and the IP- PBX device 2.
  • the SI P invite message 704 travels multiple nodes in the multimedia communications network before it reaches the SIP trunking application server 108.
  • the SI P invite message 704 comprises a unique identity of the I P-PBX device 2.
  • the unique identity is a clear reference to the IP-PBX device 2.
  • the application server 108 instructs 705 the PDN-GW 4 to apply resource reservation for the multimedia communication channel.
  • the instructions comprise the establishment of a dedicated bearer 706 between the I P-PBX device 2 and the PDN-Gw 4.
  • the PDN-Gw acknowledges 707 that the resource reservation is effectuated by sending an acknowledgment message to the application server 108.
  • the call establishment process continues 708 in a normal manner over the default EPS bearer 702.
  • the difference with the prior art is that the user plane media is transported over the dedicated bearer 706 which is established between the I P-PBX device 2 and the PDN-Gw 4. That is, the resource reservation is accomplished by establishing the dedicated bearer 706, i.e. the communication channel, between the IP-PBX 2 and the PDN-Gw 4.
  • the essence of the present invention is that the application server 108 is able to apply resource control procedures for achieving Quality-of-Service for communication sessions in the multimedia communications network with the IP-PBX device 2.
  • the advantage of the present invention is that a proper solution is provided in which IP-PBX devices 2 are able to efficiently communicate with other IP-PBX devices or with registered users in the network. That is, the communication channel established between the I P-PBX device and the packet gateway server also provides Quality-of-Service parameters, such that certain levels of services can be guaranteed to the I P-PBX devices.
  • the communication channel is utilized properly. That is, the amount of, and the type of, resource reservation of the communication channel between the IP-PBX device and the packet gateway server is coupled to the type of request with the IP-PBX device. As such, a proper communication channel, having appropriate QoS parameters, is established between the I P-PBX device and the packet gateway server.
  • the present invention is not limited to the embodiments as disclosed above, and can be modified and enhanced by those skilled in the art beyond the scope of the present invention as disclosed in the appended claims without having to apply inventive skills.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephonic Communication Services (AREA)

Abstract

La présente invention concerne un procédé d'application d'une réservation de ressources pour un canal de communication multimédia entre un serveur de passerelle de paquets inclus dans un réseau de communication multimédia à protocole Internet (IP) et un dispositif d'autocommutateur privé (PBX pour Private Branch Exchange) IP, ledit procédé comprenant les étapes consistant à recevoir, au moyen d'un serveur d'application (AS pour Application Server), inclus dans ledit réseau de communication multimédia IP, une requête pour établir une session de communication avec ledit dispositif IP-PBX, ladite demande comprenant une identité unique dudit dispositif IP-PBX, à donner comme instruction, au moyen dudit serveur AS, audit serveur de passerelle de paquets par le biais d'un serveur de politique de porteuse et de facturation inclus dans ledit réseau de communication multimédia IP, à appliquer une réservation de ressources pour ledit canal de communication multimédia en se basant sur ladite identité unique reconnue dudit dispositif IP-PBX, et à appliquer, au moyen dudit serveur de passerelle de paquets, ladite réservation de ressources pour ledit canal de communication multimédia entre ledit dispositif IP-PBX et ledit serveur de passerelle de paquets.
PCT/EP2015/081358 2015-12-29 2015-12-29 Procédé, système et dispositifs permettant d'appliquer une réservation de ressources dans un réseau de communication multimédia à protocole internet (ip) Ceased WO2017114565A1 (fr)

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PCT/EP2015/081358 WO2017114565A1 (fr) 2015-12-29 2015-12-29 Procédé, système et dispositifs permettant d'appliquer une réservation de ressources dans un réseau de communication multimédia à protocole internet (ip)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110106971A1 (en) * 2009-10-30 2011-05-05 At&T Intellectual Property I, L.P. Method, computer readable medium, and apparatus for providing different services to different users of an aggregate endpoint in an internet protocol multimedia subsystem (ims) network
US20150127759A1 (en) * 2013-11-04 2015-05-07 At&T Intellectual Property I, L.P. Per-Session Invocation of Priority Services Based Upon Network Available Information

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110106971A1 (en) * 2009-10-30 2011-05-05 At&T Intellectual Property I, L.P. Method, computer readable medium, and apparatus for providing different services to different users of an aggregate endpoint in an internet protocol multimedia subsystem (ims) network
US20150127759A1 (en) * 2013-11-04 2015-05-07 At&T Intellectual Property I, L.P. Per-Session Invocation of Priority Services Based Upon Network Available Information

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