Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
  • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W72/00—Local resource management
  • H04W72/30—Resource management for broadcast services
• • 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]
  • H04W28/24—Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
  • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
  • H04W4/08—User group management
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W76/00—Connection management
  • H04W76/40—Connection management for selective distribution or broadcast
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W8/00—Network data management
  • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities

Definitions

• the invention relates to a method for transmitting data sets provided as so-called group messages (multicast messages) according to the preamble of claim 1, a mobile telecommunications network according to the preamble of claim 18 and a computer program product according to the preamble of claim 20.
• Multicast transmissions are known on the Internet.
• a corresponding group message is sent to a server without the data sender having to know which subscribers are connected to this server.
• the invention is based on the problem of achieving a simplification of the definition of transmission qualities for the transmission of group messages.
• the invention solves this problem by a method with the features of claim 1 and by a mobile telecommunications network with the features of claim 18 and a computer program product with the features of claim 20.
• claims 2 to 17, 19 are referred to and 21 referenced.
• the establishment of a multicast message service is also possible, for example, in one Telecommunication network, in particular a mobile radio network, with the special conditions prevailing there, individually technically different devices possible. All data records that are sent as a group message for a specific group can thus be assigned the same quality standard of transmission, regardless of the individual group participants. This considerably reduces the effort required to determine transmission parameters in the multicast service. No individual negotiation of the transmission parameters then takes place during the data transfer to the respective participants, but these are specified by the administration unit in which they are stored in a group-specific manner.
• the administration unit in which the quality standards for the respective groups are stored, a database assigned to the home location register is particularly advantageous. Then an existing network element for address management can be assigned the additional function according to the invention.
• the quality standard can be specified by a provider of data sets for groups and can vary depending on the data. For example, a different delay time until it is sent can be provided for current messages than for periodically sent information that is less up-to-date.
• a complete so-called Quality of Service profile can advantageously be stored under the quality parameters. This can contain information on priority and / or delay, reliability, maximum and / or average data rate.
• FIG. 2 shows a schematic diagram of the individual steps when requesting a retransmission of a message, listing all the data transmissions exchanged for this purpose, in accordance with the prior art
• FIG. 3 shows a representation similar to FIG. 2 in a further development according to the invention for the transmission of a group message.
• the application of the invention to data transmission in a mobile radio network NT is shown.
• An application of the invention to a landline network is also fundamental. additionally possible.
• the z. B. works according to the transmission standard UMTS (Universal Mobile Telecommunication System), GSM (Global system for mobile communication), GPRS (General packet radio service) or EDGE (Enhanced Data Rates for GSM environments)
• the transmission of group messages enables the implementation of new services in the field of mobile communications, for example news groups, video conferences, video-on-demand or distributed applications.
• a transmission of audio and video messages is possible.
• the transferred data type is arbitrary.
• a multicast method is used according to the invention:
• the various participating mobile telecommunication devices (T1 ... TN) for example subscribers
• T1 ... TN participating mobile telecommunication devices
• TN for example subscribers
• the respective data sender then does not need to have any information about which and how many recipients are hiding behind this group address.
• the sender only needs to know the address of the person to be notified Know multicast group XY and send the data to be transmitted only once to this multicast address in a single data transmission.
• the mobile telecommunications network NT comprises as subscribers a number of mobile telecommunications devices T1, T2, ..., TN.
• the communication network NT In order to organize the data transmission from, to and between them, the communication network NT is two different ones
• Types of nodes (GPRS support nodes: GSN) assigned for data transfer: on the one hand, several regional nodes SGSN (serving GSN) are provided, each of which organizes a specific spatial subgroup of the mobile telecommunication devices T1 ... TN, the so-called SGSN area.
• the SGSN keeps track of the location of the mobile telecommunication devices T1 ... TN, performs security functions and access controls and forms the interface to another node, the GGSN (Gateway GSN).
• the Internet comes into consideration for this, as shown in FIG. 1.
• This data transmission runs via an interface labeled Gi, which represents a leased line and connects the gateway GSN to, for example, a server on the Internet.
• Both node types i.e. the SGSN and the GGSN, can be linked to a database, the so-called Home Location Register HLR, via Ge data transmission links (interfaces) Gc and Gr connected. These interfaces can also be fixed wire connections and are only used for internal information transmission, not for routing data of the group message.
• the HLR database of which several can be implemented, depending on the capacity and organization of the network, is for the management of the mobile telecommunication devices T1 ... TN, that is to say the participating mobile phones, permanently installed telephones in vehicles , Laptops and the like.
• the SGSN can request user-specific information from the HLR, e.g. B. for authentication of a user's mobile telecommunications device T4.
• the addresses of the participating telecommunication devices T1 ... TN are stored here.
• the SGSN is responsible for establishing the connection between a mobile telecommunications device T1 ... TN and a data network, for example the Internet, which sends the group message as a data packet.
• Radio Network Subsystems RNS
• Node B which are designed as antennas, transmission masts or the like in a known manner.
• a control unit RNC Radio Network Controller
• RNS Radio Network Controller
• the Radio Network Controller is connected to the Node B transmitters in its area via a series of leased lines Iub and can use the resources of the air control Uu, which are used by the Node B in connection with the mobile telecommunication devices.
• the management unit VE is a database within the HLR, which is not mandatory, but does have the advantage that an existing network component that is already in question for establishing a connection can be used. The effort in terms of hardware and software to set up such a database VE is therefore relatively low.
• the task of the management unit VE is the centralized storage of group-specific transmission data in order to maintain a group-uniform transmission quality without having to negotiate individually with the participating terminal T1 ... TN.
• the stored quality parameters form a so-called Quality of Service profile • QoS, which specifies the following parameters for the transmission of group messages to the group XY:
• the priority of a data record A to be transmitted ie that the value of a data record can be determined in the event of a utilization or overload of available resources and it can then be determined whether the corresponding data record should be sent as a priority or lag behind others;
• the delay of a data record A to be transmitted ie that the maximum duration of the residence time of the data record in the network NT can be predetermined;
• the maximum data rate for the transmission of a data record A i.e. that a specification for the upper limit of the expected data rate is specified in bytes / s;
• All these parameters can be saved as default values and preset for specific groups. For example, a higher average and maximum data transmission rate can be specified for memory-intensive image data transmission than for subscribers to a transmission service for sports results. Current news, such as real-time stock market prices, can be given higher priority and less delay than comments and background reports.
• a data packet when a data packet is sent from the Internet, it is first sent to the GGSN, which asks the responsible SGSN at the HLR.
• the GGSN then notifies the SGSN that data for the corresponding mobile telecommunications device T1, T2 or any other present.
• the node SGSN then initiates the connection establishment between the requested subscriber T1, T2 ... and the external network.
• PDP Packet Data Protocol
• the network NT prompts one of the subscriber devices T1 ... TN to request the PDP context.
• the transmission of the PDP context is required in each individual connection between a mobile telecommunication device T1 ... TN of the multicast group XY and the SGSN.
• the respective network subscriber here T4, first sends the
• This message Nl contains, among other things, the information element "QoS requested" with which those quality parameters, which are desired for the respective participant (here T4).
• the SGSN is asked to provide and set these parameters for the subsequent data transmission.
• the SGSN can respond to the request or provide a lower quality QoS, for example if the requesting telecommunications device T2 does not have the required authorization. This authorization can be clarified in a previously performed query of the security functions.
• the SGSN then sends the message N2 “RAB Assignment Request” to the radio network controller RNC in charge, with which the RNC is asked to establish a connection between itself and the requesting subscriber T4.
• This message N3 is acknowledged by subscriber T4 with the reply N4 “RB Setup Complete”.
• the radio network controller can then send the execution message N5 "RAB Assignment Response" back to the SGSN, provided the RNC agrees with the QoS data transmitted by the SGSN and thus a connection to the subscriber T4 could be established. If this was not possible , the SGSN can also adjust the requested QoS retrospectively to the actually available technical skills.
• the connection to the GGSN is established, which, as described above, acts as an interface to an external network, both for example the Internet.
• the node SGSN sends the message N ⁇ "Create PDP Context Request" to the node GGSN.
• This message N6 contains the actually confirmed QoS (QoS Negotiated), which, as described above, the one requested by the subscriber T4 (QoS Requested) ) may correspond to or deviate from this.
• the node GGSN With approval, the node GGSN sends the confirming message N7 "Create PDP Context Response" back to the node SGSN.
• the SGSN is now able to establish the complete connection between the external network and the inquiring telecommunications device T4 with the message N8 "Activate PDP Context Acknowledge") to the telecommunications device T4.
• This message also contains the finally negotiated set of parameters for data transmission (QoS Negotiated)
• QoS Negotiated The data transmission can now begin if the telecommunication device T4 supports this negotiated set of quality parameters, otherwise it can send an aborting message.
• MC Contexts multicast context
• PDP Contexts Packet Data Protocol Contexts
• MCC multicast center
• FIG. 3 shows the configuration according to the invention of the establishment of an MC context: Members Tl ... Tn of a group XY who have registered for the transmission, for example subscribers or individual registrations only for specific transmissions, are in the node SGSN as Members of this respective group XY registered, so here, for example, the mobile telecommunication device T4, among others.
• These mobile telecommunication devices T1 ... TN have been informed of the presence of a group message in the run-up to the procedure shown and then start with the respective MC Context Activation procedure, of which only one example for that in the group XY - Holding mobile telecommunications device T4 is shown.
• This message El contains information about the multicast address of the group XY and a QoS request with which to allocate those contained in the QoS data record Connection parameters is requested.
• the node SGSN then sends the to the management unit VE, which is contained here in the home location register HLR
• the message E2 contains the group address of the multicast group XY, with the help of which the administrative unit VE can make an assignment in its database to the QoS profile stored there.
• This QoS profile requested by the SGSN is then sent to the SGSN with the message E3 "QoS Profile Response".
• This QoS profile applies to all connections to members T1 to TN of the XY group, and is therefore transmitted in every MC context. sent, which is initiated by one of these telecommunications devices T1 ... TN.
• the SGSN subsequently sends the message E4 “RAB Assignment Request” to the radio network controller (RNC), the message E4 containing the QoS, which this time, however, is not set individually, but as a default for everyone Group members were notified by the HLR.
• RNC radio network controller
• the RNC sets up the connection to the telecommunication device T4 with the message E5 "RB Setup”. This acknowledges with the message E6 "RB Setup Complete”.
• the RNC also agrees with the QoS (security functions) and a connection is established between RNC and T4, the RNC sends the message E7 "RAB Assignment Response" to the SGSN to establish the connection to confirm.
• the SGSN can do the QoS retrospectively limit and adapt to the available resources. However, this has the consequence that the QoS restricted in this way is now restricted in the same way for all other subscribers T1 ... TN of the group XY. It is therefore planned that the QoS should not be restricted to a minimum standard. If the group XY contains participants who do not meet this minimum standard, they cannot participate in the transmission.
• the SGSN sends the message E8 “Create MC Context Request” to the GGSN.
• This message E8 contains the QoS negotiated, that is to say the final QoS, which may differ from that originally stored in the administrative unit VE in the HLR.
• the GGSN sends the message E9 "Create
• the SGSN After receiving the message E9, the SGSN sends the message E10 "Activate MC Context Acknowledge" to the telecommunications device T4, which activates the MC Context.
• the message E10 contains the final parameter set of the QoS.
• an abort message is possible if the T4 telecommunication device cannot support the final QoS negotiated.
• the QoS is determined by the lowest priority, the longest delay, the reliability and the lowest average and maximum transmission rate. The determination of further parameters would also be possible in the manner described.
• the QoS is specified centrally by the HLR or another network component that contains the management unit VE and is not individually negotiated. Only if the GGSN or a participating telecommunications device cannot meet this required standard will the QoS be changed for the entire group, but only within limits that still seem acceptable for the respective entire group XY.
• the previous determination of the QoS in the HLR may depend, for example, on the cost of the service used. The higher these are, the higher, for example, the transmission rates, the reliability and the priority of the data records A transmitted in this way.
• a mobile radio network NT is formed for the first time, in which it is possible to receive group messages within a multicast service, which are transmitted according to a uniform standard, without the need for individual negotiation.
• the technically weakest device cannot seriously endanger the transmission, since it is excluded below a minimum limit of technical requirements.

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• Engineering & Computer Science (AREA)
• Computer Networks & Wireless Communication (AREA)
• Signal Processing (AREA)
• Multimedia (AREA)
• Mobile Radio Communication Systems (AREA)
• Time-Division Multiplex Systems (AREA)
• Small-Scale Networks (AREA)

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Citations (3)

• 2001
  • 2001-08-27 DE DE10141813A patent/DE10141813A1/de not_active Withdrawn
• 2002
  • 2002-08-01 EP EP02754486A patent/EP1421738A2/de not_active Withdrawn
  • 2002-08-01 WO PCT/DE2002/002849 patent/WO2003028282A2/de not_active Application Discontinuation
  • 2002-08-01 JP JP2003531670A patent/JP2005505958A/ja active Pending

Patent Citations (3)

Non-Patent Citations (1)

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