Motorola Corporation

Motorola Solutions, Inc.

Gregory A Dertz

Donald G Newberg

Mario F Derango

Jeffrey G Lohrbach

Michael S Densmoor

Bradley Michael Hiben

Tyrone D Bekiares

Alan P Conrad

Robert D LoGalbo

Scott M Mottonen

Surender Kumar

Mark L Shaughnessy

Michael D Sasuta

Kevin G Doberstein

John B Preston

James Earl Mathis

Armando Vera

Timothy L McVey

James D Janzen

Gerald R Drobka

Paul Wiederholt

Linda A Hanks

Paul John Smith

Jeffrey Gordon Lohrbach

Michael Scott Densmoor

Scott Michael Mottonen

Timothy L Mcvey

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 radio frequency communications system () includes wireless terminals () and base sites (). The wireless terminals communicate with the base sites over a radio frequency channel (). The base sites are interconnected to each other and other network elements via a packet network. The communication system has a radio frequency channel () with time slots () for transmission of both delay-sensitive data, such as streaming audio and video, and non-delay-sensitive data. A method and apparatus are provided for determining whether a time slot in the radio frequency channel is to be allocated to delay-sensitive data or non-delay-sensitive data (). Each packet of data transmitted over the wireless channel has a type of service field (). The type of service field has a precedence or priority value () and a service type (). The priority values are used to determine which packet should be transmitted across the radio frequency channel next and the service type determines the transmission protocol.

Method and apparatus for organizing and scheduling multimedia data transfers over a wireless channel

A slot format and acknowledgment method for use in a communication network that contains one or more wireless links. The slot format provides for the segmenting and reassembly of packets for transport over a wireless link. It also provides support for multiple types of service for the data being carried over the wireless link as well as allocating of access to the wireless link among a plurality of communication units. The acknowledgment method provides for detection of errors over the wireless link, the selective acknowledgment of error-free transmissions and the selective resending of transmissions received in error.

Slot format and acknowledgement method for a wireless communication system

A radio frequency communications system ( ) includes wireless terminals ( ) and base sites ( ). The wireless terminals communicate with the base sites over a radio frequency channel ( ). The base sites are interconnected to each other and other network elements via a packet network. A method and apparatus determine for a particular delay-sensitive application on the wireless terminal, for example, an audio or video transmission, the requirements for bandwidth for transmission over the radio frequency channel ( ). After the requirements on the radio frequency channel are determined, the necessary channel bandwidth, if available, is reserved or allocated to guarantee performance to the application ( ). The reserved bandwidth is utilized by selectively granting access to the radio frequency channel on the basis of the bandwidth allocated to the device.

Method and apparatus for determining and reserving bandwidth for transmitting delay-sensitive streaming data over a radio frequency channel

A packet non-replicating comparator device for use in a digital simulcast radio communication system generates a single seed copy of a timestamped information data packet (per channel) for transmission to either a multicast capable packet-switched network or to a packet duplicator coupled to a unicast capable packet-switched network. The multicast capability of packet-switched networks is utilized to simplify the hardware and software complexity at the comparator site, by assigning the responsibility for performing simulcast (timestamped) packet replication and distribution (to the appropriate transmitters) to the coupled packet-switched network. As a result, the elimination of the comparator performed function of sourcing multiple (replicated) packets of a seed copy frees up valuable link bandwidth and improves processing capability and makes possible the generation of multiple non-replicated packets corresponding to associated ones of multiple channels by a single comparator device.

Packet non-replicating comparator device for digital simulcast packet

In a digital multi-channel simulcast system, a redundant centralized timestamping device acts as a simulcast controller for multiple channels simultaneously. All packets within a regional multi-channel system which require simulcast transmission are sent to a central timestamping device which determines the appropriate launch timestamp for each packet and attaches it thereto. The timestamping device is able to support concurrent timestamping sessions for each channel of a multiple channel system and can be dynamically assigned (trunked) to service any given radio channel on a packet by packet, call by call, or less frequent basis.

Digital multi-channel simulcast system with centralized timestamping

A packet voting server and associated method for performing voting services on multiple radio channels simultaneously and including capability to be dynamically assigned (trunked) to service any given radio channel, for example, on a packet by packet, call by call, or less frequent basis.

Packet voting server and associated method for performing voting

In a communication system having a communication resource allocator, a plurality of communication units, a plurality of communication resources, and at least one console, the communication resource allocator is improved to comprise system reconfiguration databases, selection information, execution information, and predetermined event receiving information. The improvement allows the communication system to be automatically reconfigured in response to a predetermined event. The predetermined event is typically initiated by one of the plurality of communication units.

Method and apparatus for automatically executing system reconfigurations

A communication control console having both data and voice capability. Data signalling as transmitted on a voice channel is converted into an internally compatible format, regardless of the original signalling type, for use by the console. Conversely, data messages originating from the console are converted from the internal format to the appropriate external signalling format.

Data capable radio communication console

A communication resource method is set forth that allows communication with a subscriber unit that is in a priority access mode. Either a communication resource allocator or a subscriber unit is enabled to initiate a priority communication state in which a subscriber unit is accessible to reception of radio transmissions during the subscriber unit's priority mode status.

Remote control of priority communications automatic

In a communication system that comprises a plurality of communication resources, a plurality of consoles, a communication resource allocator, and a plurality of subscriber units arranged into a plurality of communication groups, the communication resource allocator comprises memory for storing presented and unpresented communication groups. By storing unpresented communication groups, a console, via an associated operator MUX interface module, may automatically utilize the unpresented communication groups without intervention from an operator of the console.

Growing community of inventors

Algonquin, IL, United States of America

Gregory A Dertz