Matches 1 - 27 out of 27
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7421281 Methods and apparatus for supporting group communications  
Group communications methods and apparatus are described. In particular, methods for granting a mobile device access to a communications resource, e.g., the right to transmit data, associated with...
7398111 Methods and apparatus for operating mobile nodes in multiple states  
The use of multiple states of mobile communication device operation to allow a single base station to support a relatively large number of mobile nodes is described. Various states require...
7363039 Method of creating and utilizing diversity in multiple carrier communication system  
In many cellular systems, reusing spectrum bandwidth, creates problems in boundary regions between the cells and sectors where the signal strength received from adjacent base stations or adjacent...
7356020 Support of disparate addressing plans and dynamic HA address allocation in mobile IP  
Methods and apparatus for enhancing Mobile IP signaling and to support use of disparate addressing plans and dynamic Home Agent allocation in Mobile IP Regional Tunneling are described. The...
7339903 Enabling foreign network multicasting for a roaming mobile node, in a foreign network, using a persistent address  
Permitting a mobile host to roam in a foreign network, with multiple access node handoffs, while permitting foreign network multicasting by (i) having the mobile node (MN) use a persistent address,...
7245898 Programmable foot switch useable in a communications user interface in a vehicle  
A communications system for a vehicle having a foot pedal useable to control communications at a user interface in the vehicle. By controlling the user interface at least in part through activation...
7151946 Controller for reducing latency in a group communication network  
A method and apparatus for reducing perceived latency in a group communication network provides for receiving a request from a user of a communication device wishing to initiate a group call,...
7079857 Method and apparatus for providing arbitration in a group communication network  
A method and apparatus for arbitrating between a first communication device having floor control in a group communication network and a second communication device competing for floor control...
7069031 Communication device for providing security in a group communication network  
A method and apparatus for providing security in a group communication network provides for receiving an encryption key, encrypting media for transmission to a controller using the received...
7062286 Conversion of calls from an ad hoc communication network  
An improved system and procedure for allowing participants within a group conversation on a wireless communication network to at least temporarily break away from a group conversation and hold a...
7035655 Communication device for reducing latency in a group communication network  
A method and apparatus for reducing perceived latency in a group communication network provides for receiving a request from a user of a communication device wishing to initiate a group call,...
6965767 Communication device for entering and exiting a net within a group communication network  
A method and apparatus for entering a net within a group communication network provides for requesting a current list of available nets that the communication device may join from a controller and,...
6961595 Methods and apparatus for operating mobile nodes in multiple states  
The use of multiple states of mobile communication device operation to allow a single base station to support a relatively large number of mobile nodes is described. Various states require...
6928294 Method and apparatus for enabling group communication services in an existing communication system  
An apparatus to form a group of communication devices over a distributed network is claimed. A first node establishes a first channel with a first communication device. At least one second node...
6922547 Methods and apparatus for supporting group communications  
Group communications methods and apparatus are described. In particular, methods for granting a mobile device access to a communications resource, e.g., the right to transmit data, associated with...
6788963 Methods and apparatus for operating mobile nodes in multiple a states  
The use of multiple states of mobile communication device operation to allow a single base station to support a relatively large number of mobile nodes is described. The various states require...
6545995 Maintenance of group call in mobile communication system  
A method of maintaining a group call in a mobile communication system comprising a network infrastructure and mobile stations, the method comprising the steps of: establishing a group call in which...
6477150 System and method for providing group communication services in an existing communication system  
The present invention is a system and method for providing group communication services in an existing communication system. Group communications are enabled by installing a communications manager...
6091329 Monitor/hands-free intercom  
A monitor/hands-free intercom system includes a child unit and a parent unit which are each transceivers. The parent unit operates primarily as a receiver, unless and until a talk switch is...
6088343 GSM transceiver controlling timing races in channel establishment in a GSM protocol stack and method of operation thereof  
A GSM transceiver for use in a GSM network and a method of use of the GSM transceiver is disclosed. The GSM transceiver includes a multilayer protocol stack for executing a plurality of...
6052578 Method for converting contention busied calls in a wireless communication system  
Upon detecting a contention between a call request and an active call (404), the call request is added to a busy queue as a contention busied call (412) and at least one logical link is created...
5983114 Method and apparatus for monitoring link activity to prevent system deadlock in a dispatch system  
Method and apparatus to prevent system deadlock in a dispatch system by monitoring link activity. The dispatch system is comprised of a set of remote units which communicate with each other by...
5983099 Method/apparatus for an accelerated response to resource allocation requests in a CDMA push-to-talk system using a CDMA interconnect subsystem to route calls  
In a push-to-talk dispatch system, a method and apparatus for providing an accelerated response to a push-to-talk origination message. A first base station allocates a first set of equipment to...
5884196 Method and apparatus of preserving power of a remote unit in a dispatch system  
To reduce the power consumption of a remote unit in a dispatch system the remote unit enters a dormant state. A base station transmits a forward link broadcast signal and monitors a common access...
5881368 Method and apparatus of power control in a CDMA dispatch system  
In a dispatch system, power of the forward link broadcast channel transmitted from a base station is controlled such that the power level is the minimum necessary and such that transmission of the...
5844885 Method and apparatus of providing bit count integrity and synchronous data transfer over a channel which does not preserve synchronization  
Synchronization and bit count integrity of a synchronous data stream is preserved end to end even as it is transmitted via a medium which does not preserve the synchronous nature of the synchronous...
5711010 Method of establishing access to secondary communication resources in a communication system  
In a radio communication system, a method of establishing access to a secondary communication resource includes the steps of identifying a need for such a resource, and requesting access to that...
Matches 1 - 27 out of 27