Motorola Corporation

Motorola Mobility LLC

Google Technology Holdings LLC

Jeffrey C Smolinske

Kenneth Anderson Stewart

Michael Eoin Buckley

Mark Conrad Cudak

Stephen Lee Spear

Daniel C Chisu

Charles Philipp Binzel

Lawrence Alan Willis

Phieu M Tran

Christopher L Clanton

Robert C Scheibel, Jr

Louis D Finkelstein

Jyoti Black

Daniel P Brown

Kevin Donnellan

Gary Edwin Western

James Joseph Kosmach

William P DeClerck

Phieu Moc Tran

John E Emrich

Jeffrey W Tripp

Bruce M Paggeot

Robert C Scheibel

Olivier Peyrusse

Trang Nguyen

Dominic Michael Tolli

Guillaume Favre

Mark E Pecen

Jyoti N Black

A method and apparatus for jointly decoding a first and second message is disclosed. The signaling scenario illustrated by FIG.and using the codeword properties defined herein, the various embodiments may combine multiple messages under the hypothesis that the value of a message portion corresponding any subsequent observed transmission is different. Accordingly a first buffer may store the first observed message frame () and a second buffer may sum the LLR's of subsequent observed frames (). In the embodiments disclosed, two decoding hypotheses are required only; a first where the two buffers are combined directly () and a second where the difference codeword bit LLR's of the first buffer () are inverted before combining with those of the second buffer (). A maximum of N transmissions is allowed by the receiver (), after which a decoding failure is declared.

Apparatus and methods for jointly decoding messages based on apriori knowledge of modified codeword transmission

A mobile station () will have the capability to detect an impending cell change and Routing Area Update (RAU) and will send a 'Request Deny' message to the network via the serving cell prior to handing over. The PTT server () will use the Request Deny message as an indication that an inter-SGSN RAU may be occurring. The PTT server () will wait for the mobile station to reappear, after handover, on a new cell. If the mobile does not reappear, an inter-SGSN RAU may be assumed and the PTT server () will release the floor and deny the floor to all mobile stations. This action forces all mobile stations back into idle mode and prevents them from seizing the floor. The PTT server () will then wait for the mobile station () performing the RAU to reappear on a new cell before opening the floor to all mobile stations.

Management of anticipated data outages in a Push-to-X communication system

A wireless communication device employs a method for receiving a message stream on a control channel. According to one embodiment, the wireless communication device receives a message on the control channel. The wireless communication devices attempts to decode the message and, if the message is successfully decoded, adds bits of the successfully decoded message to a message attributes list. Some time thereafter, the wireless communication device attempts to decode a subsequent message received on the control channel and, if an error is detected during decoding of the subsequent message, replaces bits in the subsequent message with bits from the message attributes list to produce a modified message. The wireless device then attempts to decode the modified message.

Method for decoding a received control channel message with a priori information

Various embodiments are described to address the need to lower backhaul costs for EGPRS operators while maintaining the low and constant delay characteristics they require. 20 msec TRAU frames (-) are still used for backhaul to maintain the low and constant delay. However, to eliminate the restriction of mapping TRAU timeslots to air timeslots (-) one-to-one, the TRAU slots are collectively treated as a one large 20 msec TRAU frame for a group of air timeslots. The data for the air timeslots can be packed efficiently into this giant TRAU frame, ignoring backhaul timeslot boundaries. In this way, the appropriate amount of backhaul for the carrier can be allocated and the data for the air interface timeslots more efficiently packed into the backhaul.

Method and apparatus for dynamic backhaul resource management in a wireless communication system

A method () and apparatus () facilitate a session handover between a first site and a second site. A wireless communication unit such as a mobile station (), user equipment () can move from one site to another site whereupon new identifiers can be setup for the new site. If a serving node associated with the new site is also new, identifiers can be set up for the new site and the new serving node.

Inter-network handover in a packet radio system

A communication system assigns a combination of values of multiple combinations of values to a first control channel parameter and a second control channel parameter. Based on the values assigned to the first and/or second control channel parameters, repeat periods corresponding to each of a first, second, and third control messages are determined. New combinations of values of the multiple combinations of values are then assigned to the first and second control channel parameters and new repeat periods corresponding to each of the first, second, and third control messages are determined in association with each new combination. Optimal repeat periods corresponding to each of the first, second, and third control messages are then selected from among the repeat periods determined with respect to each combination of values. Based on the selected repeat periods, an optimal combination of values is selected for each of the first and second control channel parameters.

Method and apparatus for control channel scheduling in a packet data communication system

To address the need for a communication infrastructure and method to speed uplink data setup, the present invention provides for the assignment of uplink packet data resources by basestation transceiver systems (BTSs) without the need to communicate with any packet control unit (PCUs) first. The present invention accomplishes this by reserving packet data resources before they are needed or requested and providing them to BTSs for assignment. Thus, BTS-PCU communication occurs in the period before an uplink connection is needed and after uplink data is established, effectively eliminating the BTS-PCU delay from uplink data setup. Moreover, the present invention provides for the transmission of transmit allowance messages before an uplink request is made by the communication unit, further reducing uplink data setup time.

Communication infrastructure and method to speed uplink data setup

The method for transmitting a communication signal comprising a plurality of units of information includes transmitting the plurality of units of information via a predetermined number of channel resources; determining a number of the plurality of units remaining in at least a portion of the communication signal; based on the predetermined number of channel resources, adjusting the number of the plurality of units remaining to produce an adjusted number of units remaining; and transmitting the adjusted number of units remaining to the wireless communication system.

Method for performing a countdown function during a mobile-originated transfer for a packet radio system

The present invention provides a method (500), device (400), microprocessor (500) and microprocessor memory (400, 500, 600) for instantaneous preemption of packet-switched data from a user that has won contention for a channel and for transmitting on a time slot, by higher priority traffic type data or voice in a TDMA communication system having a central access manager and a plurality of subscriber units. Before transmitting a packet on an uplink channel, the subscriber unit first selects a time slot and contends for channel access on the time slot. Upon gaining access to the uplink channel, the subscriber unit begins transmitting segments of a data packet on the selected time slot, suspending transmission when a higher priority user gains access to the time slot and, where decoding fails, suspending transmission for the time slot. The subscriber unit continues to transmit on the selected time slot until the packet ends.

Method, device, microprocessor and microprocessor memory for

Radio frequency based cellular telecommunication systems often require both subscriber units and communication units of a fixed network communication system to maintain secret data which may be used to verify authenticity as well as provide encrypting variables for message encryption processes. An efficient real-time authentication method and apparatus are provided which use a single message to provide authentication and communication link setup information. Further, an authentication method and apparatus are provided which uses instant-specific information such as a time of day, radio frequency carrier frequency, a time slot number, a radio port number, access manager identifier, a radio port control unit identifier, or a base site controller identifier to enhance the reliability of the authentication process. Furthermore, a method and apparatus are provided for maintaining secure packet data communications through an encryption process by utilizing a packetized message encryption key and a unique packet number as encryption variables.

Method and apparatus for efficient real-time authentication and

The method and device of the present invention provide for efficient error correction in a packet radio system by 1) eliminating wasted bandwidth due to the unnecessary retransmissions that occur as a result of lost positive acknowledgments, 2) occupying less downlink bandwidth than a scheme requiring positive acknowledgments, and 3) minimizing packet delay by providing two levels of error correction at the datalink layer.

Method and device for efficient error correction in a packet-switched

A radio communication system (100) employs a method (300) and apparatus (103) for providing chronological information to a communication unit (103). A base site (101) of the radio communication system (100) determines (303) the chronological information (e.g., time and date). The base site (101) transmits (305) the chronological information in a portion of a system control signal (107) to the communication unit (103). The communication unit (103) receives (311) the chronological information and maintains (313) the chronological information for use (315, 317) by a user of the communication unit (103).

Radiotelephone communication unit displaying chronological information

The present invention provides a fair and efficient method (1000), device/microprocessor (500, 600) and computer software for utilizing the downlink channel in a TDMA packet-switched communication system supporting both single slot subscriber units and multiple slot subscriber units which both use the same air-interface protocol.

Method, device/microprocessor, and computer software for providing

The present invention provides a method (400, 500, 600, 700, 800, 900, 1000) and device (1100, 1200, 1300) for contention for channel access to single-slot subscriber units that are capable of transmitting and receiving data on one time slot per TDMA frame, allowing contention for channel access on any one of the available packet time slots and transmission on the time slot where contention is won. Thus, the present invention eliminates a requirement for a subscriber unit to be assigned to a particular time slot for contention, thereby eliminating the problem of performing load balancing on the time slots.

Method and device for channel contention and data transmission for

A novel scheme efficiently indicates to a plurality of users which user has been granted access to a multi-access packet channel. Transmission and reception of a predetermined limited number of echo bits per timeslot reduces bandwidth usage, and over the duration of a packet, these bits are equivalent to a variable length random identification number which is used for identifying which user has been granted access.

Growing community of inventors

Hoffman Estates, IL, United States of America

Jeffrey C Smolinske