Matches 1 - 42 out of 42
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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...
7385957 Methods and apparatus for extending mobile IP  
Methods and apparatus facilitating mobile node paging in a system where a mobile node is able to hand off application processing to an application proxy are described. Paging determinations are...
7376425 Base station based methods and apparatus for supporting break before make handoffs in a multi-carrier system  
A mobile communications device initiates a handoff from its current base station (BS) sector network attachment point to a new BS sector. The mobile sends a handoff request over its current...
7369855 Methods and apparatus for the utilization of core based nodes for state transfer  
Methods and apparatus for storing, manipulating, retrieving, and forwarding state, e.g., context and other information, used to support communications sessions with one or more end nodes, e.g.,...
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,...
7295854 Method, system and a network element for controlling point-to-multipoint transmission in a mobile communication system  
A method, a system and a network element for controlling the transmission of a message to be transmitted point-to-multipoint in a mobile communication system. In order to take the topicality of the...
7212821 Methods and apparatus for performing handoffs in a multi-carrier wireless communications system  
A mobile communications device initiates a handoff from its current base station (BS) sector network attachment point to a new BS sector. The mobile sends a handoff request over its current...
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...
7065066 Communication method, communication terminal, wireless ad-hoc network and cellular phone  
Group communication is performed in the wireless ad-hoc network that has a rearrangement frequency of connection higher than the communication frequency due to the movement of communication...
7047009 Base station based methods and apparatus for supporting break before make handoffs in a multi-carrier system  
A mobile communications device initiates a handoff from its current base station (BS) sector network attachment point to a new BS sector. The mobile sends a handoff request over its current...
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,...
7020465 Controlling hand-off in a mobile node with two mobile IP clients  
Extending Mobile IP to support both local and remote access by using two MIP client stacks in the end node, a roaming Node in the local access network, a standard Home Agent in the remote network....
6993333 Methods and apparatus of improving inter-sector and/or inter-cell handoffs in a multi-carrier wireless communications system  
A wireless communications system, e.g., an OFDM system, uses a plurality of carrier frequencies each with an associated frequency band. A base station sector transmitter in the system transmits...
6990337 Methods and apparatus for the utilization of core based nodes for state transfer  
Methods and apparatus for storing, manipulating, retrieving, and forwarding state, e.g., context and other information, used to support communications sessions with one or more end nodes, e.g.,...
6982961 Push-to-talk and push-to-conference in a CDMA wireless communications system  
A method of providing push-to-talk and push-to-conference functionality in a CDMA system. Participants, in one embodiment, may be divided into active and inactive participants with active...
EP1031187B1 METHOD AND APPARATUS FOR COMMUNICATING IN A DISPATCH COMMUNICATION SYSTEM  
Abstract not available for EP1031187 Abstract of corresponding document: US5850611 A dispatch communication system (100) that includes a system controller (101), multiple base sites (103-105), and...
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...
6912402 Method system and a network element for controlling point-to-multipoint transmission in a mobile communication system  
A method, a system and a network element for controlling the transmission of a message to be transmitted point-to-multipoint in a mobile communication system. In order to take the topically of the...
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...
6611688 Position reporting method for a mobile terminal in a mobile communication network  
A mobile terminal reports its position to the mobile communication network on a regular and unsolicited basis. Position reports are combined with data, such as channel quality measurements or...
6512930 On-line notification in a mobile communications system  
A system notifies a first user of a mobile communication device about status of other users in a mobile communications system. The system sends a signal from the mobile communication device to a...
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...
6405051 Method and apparatus for using a B-answer signal to prevent a voice announcement in a group call  
A technique for preventing voice announcements in a group call is provided. If any voice activity precedes a B-answer signal on a call to a party, that party is not added to the group call. This...
6157843 Method for pre-establishing communications in a wireless communication network without the use of a multicast server  
Network access delays are minimized by using affiliation messages to pre-establish communications in a wireless communication network (100). A controller (102), upon receiving an affiliation...
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...
5953673 Method of establishing a connection between a calling subscriber of a telecommunications network and a called mobile target subscriber of a mobile radio network  
A target subscriber (SB) of the target group defined by a group call number who is best suited with respect to the calling subscriber (SA, SA') of the tele-communications network (PSTN, PLMN') is...
5924041 Method and apparatus for providing a dispatch system in a cellular radiotelephone system  
A method and apparatus for providing a dispatch system in a cellular radiotelephone system. Membership in a dispatch group is implicitly created by assigning a common telephone number to all...
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...
5850611 Method and apparatus for communicating in a dispatch communication system  
A dispatch communication system (100) that includes a system controller (101), multiple base sites (103-105), and a group of communication units (107-111) employs a method and apparatus for...
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...
5805976 Single site, split location trunked radio communications system  
Base stations located at physically separate, remote locations are operated as a single site to permit trunked radio communications between portable radios located at those split sites. A first...
5752198 Single site, split location trunked radio communications system  
Base stations located at physically separate, remote locations are operated as a single site to permit trunked radio communications between portable radios located at those split sites. A first...
5689801 Power monitoring system for a single site, split location trunked radio communication system  
Base stations located at physically separate, remote locations are operated as a single site to permit trunked radio communications between portable radios located at those split sites. A first...
Matches 1 - 42 out of 42