Motorola Corporation

Motorola Solutions, Inc.

Shmuel Silverman

Ron Rotstein

Randy L Ekl

Robert D LoGalbo

Raymond M Liss

Colin D Frank

Mark J Johnson

Tyrone D Bekiares

Randall R Stewart

Aparna Pandey

Robert J Corke

Adam Cory Lewis

George Popovich

ShaoWei Wei Pan

Christopher G Ware

Bruce M Wiatrak

Wesley Stuart Jones

Howard Mark Nodell

Timothy L Moran

Robert Gerald Hug

Mark O'Beirne

Bruce A Oltman

Rich Comroe

William M Bondy

A method and apparatus for facilitating a fast handoff for subscribers in a Wireless Metropolitan Area Network (WMAN) by establishing a hard association with a first entity by sending a hard association request to the first entity and receiving a hard association response in response to the hard association request and establishing a pending association with a second entity by sending a pending association request to a second entity and receiving a pending association response from the second entity. In one embodiment, the pending association with the second entity may be converted to a hard association.

Method and apparatus for facilitating a fast handoff in a wireless metropolitan area network

Multiple-configuration communication apparatus includes: a communication device () simultaneously maintaining at least a first and a second channel; a storage device () storing a plurality of communication configurations; and a configuration controller () determining a first time frame and during the first time frame, selecting a first communication configuration of the plurality of communication configurations and controlling the communication device to configure itself to the first communication configuration to at least one of transmit and receive information over the first channel, and determining a second time frame that is different from the first time frame and during the second time frame, selecting a second communication configuration of the plurality of communication configurations, and controlling the communication device to configure itself to the second communication configuration to at least one of transmit and receive information over the second channel.

Multiple configuration communication apparatus

A method and system for wireless data transmission between at least three stations use multiple frequency bands for simultaneous channel communications. The method includes transmitting a Request To Send (RTS) packet from a first station to an intermediate second station over a first frequency band. Two Clear To Send (CTS) packets, which CTS packets include transmission timing information, are then transmitted from the second station simultaneously both to the first station and to a third station. The CTS packet sent to the first station is transmitted over the first frequency band and the CTS packet sent to the third station is transmitted over a second frequency band. A data packet from the first station is then transmitted to the second station. The third station suspends, based on the transmission timing information included in the CTS packets, any unicast transmission to the second station during the transmission of the data packet from the first station to the second station.

Medium access control for simultaneous channel communications

The present invention allows a single access point ('AP';) to support a plurality of devices () operating on different frequency bands. During a first period of time, the AP initiates a contention free period at a first frequency. The AP switches from the first frequency to a second frequency, and communicates with devices operating at the second frequency. Periodically during the first period of time, the AP temporarily ceases communication with devices operating at the second frequency to initiate a contention free period at the second frequency, switch from the second frequency to the first frequency, initiate another contention free period at the first frequency, and switch from the first frequency back to the second frequency.

Method for supporting a plurality of subscribers operating on different frequency bands using a single access point

A transmitting device () transmits a first packet, comprising a second encryption vector, that is encrypted using a first encryption vector. The transmitting device transmits a second packet that is encrypted using the second encryption vector if an acknowledgement message is received within a predetermined time after transmitting the first packet; otherwise, the first packet is re-transmitted. Upon receipt of the first packet, a receiving device () decrypts the first packet using the first encryption vector and transmits the acknowledgement message. Upon receipt of the second packet; the receiving device attempts to decrypt a portion of the second packet using the first and second encryption vectors. If the portion of the second packet was successfully decrypted using the first encryption vector, the receiving device re-transmits the acknowledgement message for the first packet; otherwise, it transmits an acknowledgement message for the second packet.

Method for providing point-to-point encryption in a communication system

Disclosed is a method for performing handoff in a communication system of access points and a mobile station, where the mobile station is associated with a first access point. The first access point receives a first transmission at a first signal quality from the mobile station and receives a second transmission that indicates a second signal quality at which a second access point is receiving transmissions from the mobile station. The first access point compares the first signal quality with the second signal quality and when the second signal quality is greater than the first signal quality, the first access point signals the second access point to initiate a handoff with the mobile station. The second access point responds by sending a disassociation message to the mobile station to disassociate with the first access point, wherein the disassociation message is addressed as if it originated from the first access point.

Method for performing a seamless handoff in a communication system

A communication network () utilized for providing communications between a first party and a second party includes a surveillance server () within a core network () to provide communication surveillance capability. The core network () may be a packet data network, and the surveillance server () is operable responsive to trigger information to establish communications surveillance. Communication surveillance may be established by creating duplicate bearer packets of those data packets carrying the communicated data between the parties, creating duplicate control packets of those data packets carrying in-band or out-of-band call control information between the parties and within the packet data network, and/or various combinations thereof. The duplicate bearer packets and the duplicate control packets are routed to appropriate authorized law enforcement agencies for providing surveillance.

Communication network with a collection gateway and method for providing surveillance services

In a network communication system (,) a method and apparatus includes generating a record of state information (,) associated with a service connection (,), associating the record of state information (,) to a first (,-,) of an N processing units (,-,through N), storing the associated record of state information (,) at a first (,-,) of an N memory units (,-,through N) corresponding to the first processing unit (,-,), multicasting the associated record of state information (,) over an area network (,) to be received by at least one of a second through N (,-,through N) of the N processing units (,-,through N), and storing the associated record of state information (,) at one of the N memory units corresponding to the least one of the second through N processing units (,-,through N).

Communication network method and apparatus

In a wireless code-division multiple access (CDMA) system (,), a talkgroup (,) of subscriber units is provided. A sub-talkgroup (,) of subscriber units, forming a part of the talkgroup is assigned at least one inbound channel (,). The talkgroup is assigned outbound channels (,). Members of the sub-talkgroup may simultaneously transmit voice information (,) using the at least one inbound channel, which voice information is summed (,) and re-transmitted to the talkgroup using the outbound channels. Voice information is summed so that an individual talker receives summed voice information without the individual subscriber's voice content. Subscriber units in the sub-listengroup are allowed to transmit voice information only after requesting, and receiving, an additional inbound channel.

Growing community of inventors

Buffalo Grove, IL, United States of America

Shmuel Silverman