Abstract: The invention relates to method applicable in a packet-switched cellular network for voice connections, by which method a new dedicated channel can be established quickly using the existing dedicated channel of the voice connection. The establishment of the new dedicated channel utilizes the previous dedicated channel the existence of which is extended by sending to at least the receiving terminals post-speech packets according to the invention. The post-speech packets produce a 2-second delay, approximately, which is sufficient to establish a new dedicated channel between terminals participating in a session.

Abstract: A packet mode (e.g. IP) group communication service layer is provided on top of a standard mainstream cellular radio network. Conceptually, the group communication layer includes a pair of basic logical entities, an application bridge and a call processing server (CPS). The bridge and the CPS run group service applications which communicate with group service application(s) in a mobile station MS over the IP connections provided by the radio network. The CPS is responsible for control plane management of group communications. The bridge is responsible for the real-time distribution of VoIP packets to the user terminals according to their group memberships over valid connections programmed by the CPS.

Abstract: A packet mode (e.g. IP) group communication service layer is provided on top of a standard mainstream cellular radio network. Conceptually, the group communication layer includes a pair of basic logical entities, an application bridge and a call processing server (CPS). The bridge and the CPS run group service applications which communicate with group service application(s) in a mobile station MS over the IP connections provided by the radio network. The CPS is responsible for control plane management of group communications. The bridge is responsible for the real-time distribution of VoIP packets to the user terminals according to their group memberships over valid connections programmed by the CPS.

Abstract: A packet mode (e.g. IP) communication service layer is provided on top of a standard mainstream cellular radio network. Conceptually, the communication layer comprises a pair of basic logical entities, an application bridge and a call processing server (CPS). The bridge and the CPS run packet mode communication service applications, which communicate with packet mode communication service application(s) in a mobile station MS over the IP connections provided by the radio network. The CPS is responsible for control plane management of communications. Embedded user-plane signaling is used for connecting call parties for a packet mode speech two-party (one-to-one) communication. Embedded signaling in the user-plane's bearer makes it unnecessary to reserve another bearer for the control plane's signaling, which saves network resources and allows to achieve a short connection setup time.

Abstract: Point-to-multipoint communication on a communications network includes receiving a first downlink packet stream addressed to a first mobile recipient, checking whether the first stream is associated with group communication, which has already reserved downlink radio resources for a second downlink packet stream of a second mobile recipient located in the same radio cell as the first mobile recipient. If there are no existing radio resources, new radio resources are allocated for the first stream. If there are existing radio resources, no new radio resources are allocated but the first mobile recipient is instructed to receive the second stream over existing radio resources.

Abstract: The invention relates to dynamically creating talk groups in a communications system. A new dynamic group is created by a user who defines a group definition message in his subscriber station. This group definition message uniquely identifies the new group in the system, and can be distributed to the intended group members using the usual messaging facilities available in the specific communications system. The recipients of the group definition message can store the message in their subscriber stations for subsequent use. Thus, group creation and membership management are handled at user level without interacting with the system. The role of the system is restricted to establishing a means for communication in the group whenever there are users who have activated the group for communication.

Abstract: The invention relates to method applicable in a packet-switched cellular network for voice connections, by which method a new dedicated channel can be established quickly using the existing dedicated channel of the voice connection. The establishment of the new dedicated channel utilizes the previous dedicated channel the existence of which is extended by sending to at least the receiving terminals post-speech packets according to the invention. The post-speech packets produce a 2-second delay, approximately, which is sufficient to establish a new dedicated channel between terminals participating in a session.

Abstract: A packet mode (e.g. IP) group communication service layer is provided on top of a standard mainstream cellular radio network. Conceptually, the group communication layer comprises a pair of basic logical entities, an application bridge and a call processing server (CPS). The bridge and the CPS run group service applications which communicate with group service application(s) in a mobile station MS over the IP connections provided by the radio network. The CPS is responsible for control plane management of group communications. The bridge is responsible for the real-time distribution of VoIP packets to the user terminals according to their group memberships over valid connections programmed by the CPS.

Abstract: The invention relates to dynamically creating talk groups in a communications system. A new dynamic group is created by a user who defines a group definition message in his subscriber station. This group definition message uniquely identifies the new group in the system, and can be distributed to the intended group members using the usual messaging facilities available in the specific communications system. The recipients of the group definition message can store the message in their subscriber stations for subsequent use. Thus, group creation and membership management are handled at user level without interacting with the system. The role of the system is restricted to establishing a means for communication in the group whenever there are users who have activated the group for communication.

Abstract: The invention relates to a method for point-to-multipoint communication on a communications network, comprising receiving at a radio access network a first downlink packet stream addressed to a first mobile recipient. The invention further comprises checking whether the first downlink packet stream is associated with group communication which has already reserved downlink radio resources for a second downlink packet stream of a second mobile recipient located in the same radio cell as said first mobile recipient. If there are no existing radio resources, new radio resources are allocated for said first downlink stream. However, if there are radio resources already reserved in the same radio cell, no new radio resources are allocated for the first downlink packet stream but the said first mobile recipient is instructed to receive said second downlink packet stream over said already reserved radio resources.

Abstract: A packet mode (e.g. IP) group communication service layer is provided on top of a standard mainstream cellular radio network. Conceptually, the group communication layer comprises a pair of basic logical entities, an application bridge and a call processing server (CPS). The bridge and the CPS run group service applications which communicate with group service application(s) in a mobile station MS over the IP connections provided by the radio network. The CPS is responsible for control plane management of group communications. The bridge is responsible for the real-time distribution of VoIP packets to the user terminals according to their group memberships over valid connections programmed by the CPS.

Abstract: A packet mode (e.g. IP) communication service layer is provided on top of a standard mainstream cellular radio network. Conceptually, the communication layer comprises a pair of basic logical entities, an application bridge and a call processing server (CPS). The bridge and the CPS run packet mode communication service applications, which communicate with packet mode communication service application(s) in a mobile station MS over the IP connections provided by the radio network. The CPS is responsible for control plane management of communications. Embedded user-plane signaling is used for connecting call parties for a packet mode speech two-party (one-to-one) communication. Embedded signaling in the user-plane's bearer makes it unnecessary to reserve another bearer for the control plane's signaling, which saves network resources and allows to achieve a short connection setup time.

Abstract: A call establishment in a mobile communication system comprising mobile stations that contain database in which are marked first calls of a first priority level, and a network infrastructure which the mobile stations communicate with. The process includes the steps of defining in tie database of the mobile station one or more force-controlled calls provided with a second priority level being higher than first priority level and directing the mobile station to one or more forced-controlled calls of the second priority according to the priority of the second call.

Abstract: A method for maintaining a group call in a mobile radio system, and a mobile station in a mobile radio system, wherein the geographical area covered by the system is divided into radio cells. Each radio cell includes a base station. A group call is established between the mobile stations belonging to a group call group and residing within the areas of the radio cells forming a limited group call area. In order that the mobile station, upon changing radio cells, is able to select the base station within the area of which the group call is in progress, the respective base stations send one or a plurality of group call maintenance messages to the mobile stations involved in the group call. The group call maintenance message contains information concerning the base stations located within the areas of the radio cells forming the group call area, and the group call group identity.

Abstract: A method implemented in a mobile telephone system in which each subscriber belonging to a group call group and wishing to speak requests a speech item through an interface to the mobile exchange. To avoid problems causes by concurrent requests for a speech transmission turn from two subscribers, the following steps are taken: upon detection of a request for a speech item from a subscriber, priority data specific to the request for a speech item and including a priority is generated, and the mobile exchange switches the speech signal transmitted by that subscriber whose request for a speech item has priority data of the highest priority, for the other subscribers to hear.

Abstract: The invention relates to a method of establishing a call in a mobile communications system and to a mobile communication system comprising at least one base station, mobile stations communicating with the mobile communication system and marked at least with system addresses, mobile stations communicating on a direct mode channel and marked with direct mode addresses, and at least one repeater station which transmits traffic between said at least one base station and the mobile stations, communicating on the direct mode channel. To provide flexible call setup, the repeater station comprises a conversion table for converting between said system addresses of the mobile stations and said direct mode addresses.

Abstract: A method for use in a radio system that includes a subscriber database containing data informing of facilities activated for the subscriber, exchanges, base stations and subscriber stations. In order to keep the subscriber stations informed of the facilities activated therefor, the facility data for a given subscriber station are read from the subscriber data base of the radio system and the data are sent as a facility data message through a base station via a radio path to the subscriber station, the subscriber station receives the message containing the facility data and presents these data to the subscriber.

Abstract: The invention relates to a method for setting up a group call in a cellular radio system. The method comprises allocating a traffic channel to the group call and transmitting a group call paging message containing a traffic channel indication via each base station (BS1) whose radio cell (C1) resides in a predetermined operation area of the called group to the mobile radio stations (MS1-MS5) of the group. In order to ensure that all the mobile stations of the group roaming in the area participate in the group call, an additional group call paging message is transmitted via the base stations (BS2) of radio cells (C2) adjacent to said predetermined operation area to mobile radios (MS4, MS5) of the group. The additional group call paging message contains an instruction to switch to the allocated traffic channel of the radio cell (C1) residing in said operation area.

Abstract: The invention relates to method applicable in a packet-switched cellular network for voice connections, by which method a new dedicated channel can be established quickly using the existing dedicated channel of the voice connection. The establishment of the new dedicated channel utilizes the previous dedicated channel the existence of which is extended by sending to at least the receiving terminals post-speech packets according to the invention. The post-speech packets produce a 2-second delay, approximately, which is sufficient to establish a new dedicated channel between terminals participating in a session.