Motorola Corporation

Motorola Solutions, Inc.

Other

James E Eastwood

Nathanael P Kuehner

Timothy Woodward

Todd A Leigh

Michael Joseph Crowley

Gerald R Drobka

Thomas Patrick McGovern

Timothy G Woodward

Bradley Michael Hiben

Leslie G Gustafson

Dennis R Newkirk

Mario F Derango

Jeff S Anderson

Roberto A Perez

Jamillah G Davis

Richard J Bitter

John G Lambrou

A method for selecting a channel for group communications in a conventional multi-channel communication system comprises receiving, for a plurality of channels in the multi-channel communication system, a talkgroup assignment list for the channels that identifies a set of talkgroups assigned to use the corresponding channels. A subscriber unit receives talkgroup assignment lists for multiple different channels, determines a desired talkgroup, and selects a channel assigned to the desired talkgroup using the received talkgroup assignment. The talkgroup assignment list is developed for at least one channel in the multi-channel communication system and identifies a set of talkgroups assigned to use the corresponding channel. The list is transmitted for the channel to a subscriber unit and is used by the subscriber unit to register with the system and affiliate with a talkgroup supported by the channel in the conventional multi-channel communication system.

Method for selecting a channel in a multi-channel communication system

A method for indicating the status of communication channels assigned to a talkgroup includes: determining the channels in various sites in a conventional communication system that service a talkgroup for media transmissions between subscribers of the talkgroup; receiving notification of the status of transmission activity on the channels; and based on the notification, providing an indication of the status of the channels assigned to the talkgroup so that the talkgroup or subscribers of the talkgroup can choose to proceed with a talkgroup communication. The notification may be received by an infrastructure device in an RF site or a central controlling entity. The indication may be that the channel is free for transmissions or is busy.

Method to indicate status of channels assigned to a talkgroup in a multi-site conventional communication system

The application discloses a method and apparatus for providing interoperability for a mobile subscriber unit (MSU), employing a first protocol e.g., SCEP, with a packet-data subsystem operating at a second protocol e.g., SNDCP. The method includes determining that the first protocol employed by the MSU is different from the second protocol operated by the packet data subsystem. The method then includes creating a context information for the MSU when the determined first protocol is different from the second protocol. Further, the method includes determining a header associated with the second protocol based on the created context information and then receiving at least one data packet associated with the first protocol from the MSU. The method then encapsulates the at least one data packet with the determined header associated with the second protocol. The method then transmits the at least one encapsulated data packet to the communication network through a context manager.

Method and apparatus for providing interoperability between a first protocol and a second protocol

A method and system for synchronization of link layer windows in a wireless communications system is disclosed. At a transmitter in the wireless communications system, the transmitter transmits a plurality of frames in a transmitter's link layer window, wherein each frame comprises segments and sends a request for an acknowledgement of the plurality of frames to a receiver. Then the transmitter determines a last transmitted segment of an eldest frame of the plurality of frames in the transmitter's link layer window, if a response to the request is not received within a specified time period and sets a synchronization indicator in the determined last transmitted segment of the eldest frame. Finally, the transmitter transmits the determined last transmitted segment of the eldest frame with the synchronization indicator set to the receiver.

Method and system for synchronization of link layer windows

A fence alarm for detecting and identifying a location in a fence which is broken. The fence alarm comprises a power source for providing power to the alarm components, the components including a plurality of detectors, each detector providing termination of a segment of the fence, each detector having a unique identifier, whereby the detector outputs its unique identifier when the segment is broken. The alarm includes a transmitter for transmitting the unique identifier, by means of an integrated antenna, which is received by a receiver. The fence alarm may also have computing or logic elements to provide additional storage or processing of signals, or data associated with the fence or the alarm.

Fence alarm

Fixed network equipment ( ) initializes a channel aggregation strategy and establishes a default channel aggregation. A request for a service requiring additional bandwidth is received from a device. An updated channel aggregation is generated based upon the request and the channel aggregation strategy to create an updated channel aggregation. The updated channel aggregation is signaled to at least one mobile station ( ) via an in-band message.

System and method of achieving dynamic channel bandwidth

The device ( ) includes a processor ( ) coupled to a memory ( ) containing a program adapted to control the processor ( ) to manage communications between data communications systems. The management method includes the steps of receiving a first message sent from a first data communications system ( ) comprising a plurality of blocks ( ), determining whether the blocks ( ) of the first message are transferable or non-transferrable, sending a request repeat message to the first data communications system ( ) to request the first data communications system ( ) to resend the non-transferable blocks ( ) of the first message if the processor ( ) determines that any of the blocks ( ) of the first message are non-transferable, and sending the transferable blocks ( ) in the form of a second message comprising a first plurality of fragments ( ) to a second data communications system ( ) without waiting for the first data communications system ( ) to resend the non-transferable blocks ( ).

Growing community of inventors

Bellingham, WA, United States of America

James E Eastwood