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Communication system, mobile services switching center and method for establishing a multi-dialogue communication between subscriber stations
| Details |
Inventors: Lopez-Torres, Oscar;
Assignee: Telefonaktiebolaget LM Ericsson (Stockholm, SE)
Primary Examiner: Olms; Douglas W.
Assistant Examiner: Rao; Seema S.
Attorney, Agent or Firm: Burns, Doane, Swecker & Mathis, L.L.P.
A communication system, a mobile services switching center and a method is described, for allowing a multi-dialogue communication to take place between a first subscriber station (MS1, MS2, . . . MSn) and a second subscriber station (ISDN ST1) through a mobile services switching center (MSC/VLR) of a public land mobile network (PLMN). A mapping device (MP) of the mobile services switching center (MSC) maps several communication channels between the first subscriber station (MS1, MS2, . . . MSn) and the mobile services switching center (MSC/VLR) onto at least one second communication channel (CC2) between the PLMN and a fixed network (FN). |
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DETAILED DESCRIPTION Thus, as summarised and described in FIG.
7, in the prior art communication system there is only available one communication channel between the ISDN exchange and the MSC and thus, there is a restriction for non-concurrency basically due to the two following disadvantages: the limited user rates currently provided by digital mobile systems, i.
e.
the maximum access user rate of 9.
6 KBit/s on the traffic channels; the fixed ISDN network could not provide, until recently standardised, a multirate scheme to handle and maintain the integrity of more than one ISDN channel per call.
This means, that so far there are no features available in the mobile GSM/DCS/PCS networks to provide the.
establishment of several concurrent dialogues between two mobile stations or a mobile station and an ISDN terminal connected to the ISDN fixed network.
For example, two simultaneous dialogues, one dialogue providing a bearer service of the type "video" and another dialogue of a teleservice "speech" could not be provided simultaneously.
Therefore, the object of the present invention is: to provide a communication system, a mobile services switching center and a method that allow the establishing of multi-dialogue calls in digital mobile networks between two mobile stations or between a mobile station and a subscriber to the fixed network.
5.
SOLUTION OF THE OBJECT This object is solved by a communication system for performing a multi-dialogue communication between a first subscriber station and a second subscriber station through a Mobile services Switching Center of a public land mobile network, comprising: a) at least one first communication channel provided between the first subscriber station and the Mobile Services Switching Center; b) at least one second communication channel provided between the second subscriber station and the Mobile Services Switching Center; wherein c) the Mobile Services Switching Center comprises a mapping means for performing said multi-dialogue communication by setting up a requested number of concurrent single-dialogues on a corresponding number of said second communication channels; and mapping said requested number of single-dialogues as a single call on said second communication channels onto said at least one first communication channel
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