Motorola Corporation

Other

Motorola Solutions, Inc.

Michael D Sasuta

Mark L Shaughnessy

Gary W Grube

Kenneth J Zdunek

Daniel J McDonald

Jaime Andres Borras

Richard A Comroe

Alan L Wilson

Arun Sobti

Robin U Roberts

Kamala D Urs

Sewim F Ablay

Daniel J Coombes

Rafael J Diaz

Robert Adamczyk

Surender Kumar

Jian-Cheng Huang

Marc C Naddell

James Earl Mathis

Robert W Furtaw

Stuart W Thro

Alfred B Wieczorek

Leslie G Gustafson

Gregory A Dertz

John E Major

Gary D Erickson

Russell A Marten

Lewis H Rosenthal

Richard H Coe

Donald C Mills

Michael J Bonvallet

John A Wolfe

Ronald L Scheiderer

Johnny E Blankenship

Alvin D Kluesing

Susan M Whitney

Todd A Leigh

David J Kizior

Robert B Nilles

John K Hefferan

Bruce D Heyman

Susan M Blackston

Gerald E Pioch

James J Killigrew

Craig J Collins

Robin C Roberts

A wireless communication systemcomprises a connectionless packet networkcoupled to a plurality of sites. Upon a first communication unit () initiating a call request for a 2-party call with a second communication unit (), a call serveridentifies respective multicast IP addresses (MC, MC) associated with the source and target. If the first communication unit, or its associated site () desires to send payload to the second communication unit, it addresses the payload to the multicast IP address (MC) of the second communication unit, and the second communication unit, or its associated sitejoins the multicast address MCto receive the payload. Conversely, if the second communication unit, or its associated site () desires to send payload to the first communication unit, it addresses the payload to the multicast IP address (MC) of the first communication unit, and the first communication unit, or its associated sitejoins the multicast address MCto receive the payload.

Use of IP-multicast technology for 2-party calls in mobile communication networks

A determination is made whether a service provider () is capable of supporting at least one service for one of a plurality of subscriber units (). The determination is based on whether the service provider has sufficient processing capabilities and memory to receive the service processing software from the subscriber unit and/or whether the service provider is authorized, based on communication system policies to process the particular service request for this subscriber. If the service provider is capable, the subscriber unit provides service processing logic (e.g., the service processing application and/or user customization software) to the service provider. Upon receiving the service processing logic, the service provider stores it and eventually executes it to process the requested service for the subscriber units.

Method and apparatus for processing services in communication system

A method and apparatus for utilizing a distributed location register (20 or 22) within a wireless communication system (10) is accomplished by a distributed location register which receives a request for updating communication parameters of a particular communication entity, which may be a communication device, group of communication devices, or grouping of groups of communication devices, or for retrieval of communication parameters of the particular communication entity. To process the request, the distributed location register (20 or 22) interprets it to identify one of a plurality of communication service registers (28-32, 102-112, or 136-140) which stores the communication entity's communication parameters. Having identified a particular communication service register, the communication service register receives, and subsequently processes, the request to retrieve the communication parameters of interest and/or update the communication parameters of interest.

Method and apparatus for a distributed location register

A mobility processor (34) provides location update parameters to a subscriber unit (SU1-4). The location update parameters indicate conditions upon which the subscriber unit is to provide its location information to the mobility processor. From the location information, the mobility processor determines whether the subscriber unit has provided the location information in a manner that is consistent with the location update parameters. If the mobility processor determines that the subscriber unit did not provide the location information in a manner that is consistent with the location update parameters, the mobility processor generates a new set of location update parameters which are provided to the subscriber unit.

Method and apparatus for subscriber unit location updating

A radio communication system (100, 200) employs a method of providing communication services to a communication unit (104, 105) having a plurality of service requirements. The radio communication system (100, 200) further includes a plurality of service providers (101-103) for which the communication unit catalogues (506, 512) service attributes as part of the inventive method. Further, for each of the service requirements, the communication unit (104, 105) selects (514) one of the plurality of service providers (101-103) to facilitate that service requirement.

Communication services needs of a communication unit supplied through

To set-up a dispatch call, a controller identifies the destination units, destination sites, controlled devices and paths needed to support the call, and which LAN bridges will be used to create the communication paths. The controller then assigns the controlled devices a temporary address identical to the permanent address of one of the controlled devices, and then informs the LAN bridges which LAN ports should carry messages containing the temporary address. With all controlled devices having the same temporary address, and with the LAN bridges ready to pass messages containing the temporary address along a chosen path, the controlled device assigned to support the call request can transmit the messages generated by a source communication unit to other controlled devices using the temporary address. Thus, only one representation of a message produced by the source communication unit is transmitted from the assigned controlled device.

Method for dynamic routing of communication messages

The present invention encompasses a method of facilitating talkgroup communications across a multiple-system communication network (100). A typical multi-system network (100) includes a plurality of communication units (122), a plurality of communication location areas (117-119), and a plurality of system controllers (100, 116). Upon migration of a communication unit (122) from one communication system to another, the communication unit (122) sends a registration request to the system controller (116) at the new communication system (102). The system controller (116) determines whether the talkgroup of the migrating communication unit (122) is registered with the new communication system (102). If the talkgroup is not registered with the new system (102), a database (120) is updated with the new talkgroup information, thereby facilitating talkgroup communication involving, members of the talkgroup.

Method of facilitating talkgroup communication in a peer-to-peer

The present invention encompasses a method of facilitating a talkgroup call throughout a communication network (100). A typical multi-system network (100) includes a plurality of communication units (122), a plurality of communication location areas (117-119), and a plurality of system controllers (110, 116). A communication unit (122) sends a request for a talkgroup call involving members of a first talkgroup to a system controller (116). The system controller (116), after receiving the talkgroup call request, determines which other communication systems in the multi-system network (100) contain members of the requested talkgroup. The system controller (116) sends a talkgroup call command to all communication systems that presently contain members of the first talkgroup, thereby facilitating the talkgroup call throughout the communications network.

Method of facilitating tallgroup calls in a peer communication network

In a multi-site communication system, a communication may be handed off from a first site to a second site in the following manner. Upon request and when a communication resource is available, a communication resource allocator allocates the communication resource to the requesting communication unit located in the first site. The communication resource allocator also identifies a reserved communication resource in each adjacent site to the first site. When the communication unit relocates to the second site of the adjacent sites, the communication resource allocator allocates the reserved communication resource of the second site to the communication unit without a request from the communication unit.

Method for providing communication handoff in a multiple site

A method of transmitting messages, where transmitting a message requires a plurality of transmissions, includes communicating control information, e.g., a communication resource allocation request (106) and a communication resource assignment (110), between a controller (101) and a communication unit (104) on a control communication resource (114), such that a working communication resource (115-117) is assigned to the communication unit (104). While the communication unit (104) is engaged in a first transmission of the message on the working communication resource, the control information is communicated between the controller (101) and the communication unit (104) on the working communication resource (115-117), such that the working communication resource (115-117) is assigned to the communication unit (104) for a second transmission of the message.

Method for transmitting messages in a communication system

A communication unit that is registered in a trunked communication system can continue to receive a communication from a first communication unit after initiating a push-to-talk request while the first communication unit is transmitting voice data in the following manner. Having allocated a communication resource to a group of communication units and while processing a request to communicate for the first communication unit, a communication resource allocator receives a request to communicate from a second communication unit to produce a new request to communicate. The communication resource allocator stores the new request to communicate and transmits a response to the second communication unit such that the second communication unit can continue to receive the remainder of the communication from the first communication unit. Once the first communication unit has stopped transmitting its communication, the communication resource allocator retrieves the stored communication request based upon a predetermined retrieval pattern.

Method for processing communication requests

Resource controllers (14) within a multisite communication system (20) selectively and automatically assume primary (45) and secondary (53) control modes of operation in order to ensure that adequate communication resources are assigned throughout the system at necessary sites in order to include talk group members that are dispersed throughout the system.

Method and apparatus for moving primary control of a call in a multiple

In a multi-site trunked communication system, a method for allowing a communication unit to place a unit directed group call consists of identifying, by the unit initiating the communication, a target unit and transmitting identification information of the target unit and a group call request to a communication resource allocator. Upon receipt of the identification information and the group call request, the communication resource allocator processes the request and when a resource is available in the site that the target unit is located in, allocates the resource such that the target unit and any other units of the communication group in the site can participate in the group call.

Method for placing a communication group call in a multiple site trunked

Synchronization of secure information on a control channel (104) of a secure radio trunking communication system (100), is maintained by periodically transmitting control encryption parameters (CEP) (111) by the controller (101) on the control channel (104). A secure communication unit (102 and 103) may receive and store the CEP (111) in memory (108 and 109), and subsequently, use the stored CEP (111) to communicate securely with the controller (101) on the control channel (104). When the secure communication unit is assigned to a working channel (105-107), the controller periodically sends the CEP (117) to the secure communication unit (102 and 103) on the working channel (105-107). When the secure communication unit (102 and 103) returns to the control channel (104), the secure communication unit may use the CEP (117) stored in the memory (108 and 109) to communicate securely on the control channel (104).

Method for maintaining secure information synchronization on a control

In a multi-site communication system (100), audience continuity of an established communication group call can be maintained by a central controller (116) in the following manner. Upon initial establishment of the call, the central controller (116) allocates a communication resource (105-108) of each site in a first set of sites (101-104) to the communication group and establishes an audience list of active communication units (111-115). The audience list is continually updated with information on newly transmitting communication units and relocation information of communication units already in the list throughout the group call. When the group call ends, the audience list is maintained for a predetermined period of time. If during this predetermined period of time, a subsequent group call is requested for the same communication group, the group call can be re-established based on the information contained in the audience list.

Method for maintaining audience continuity of a communication group call

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Mundelein, IL, United States of America

Michael D Sasuta