Motorola Corporation

Jerry L Sandvos

Timothy A Monahan-Mitchell

Michael J DeLuca

Scott H Richards

Charles Burton Swope

Bruce A Claxton

Robert J Schwendeman

David F Willard

Peter B Gilmore

Leonard E Nelson

William V Braun

Karl R Weiss

Anthony J Cecchin

Charles F Jackson

Thomas A Freeburg

Kenneth D Alton

Alain D Abbate

Sanjay Wanchoo

Marc S Desruisseaux

Ronald M Minkoff

Karen J Ensor

Suzette D Steiger

Alan P Zabarsky

Edward F Staiano

Michael Combs

Deborah J Monks

Robert J Mccall

A computing device (100) has memory (180) subdivided into a first configuration of pools of fixed size memory buffers (188). In response to requests for memory specifying a particular memory size, a fixed size memory of at least the particular size is allocated from the memory area (510, 520). Metrics are collected for each memory request, the metrics including distinct memory sizes based on the particular size requested, and the peak number of concurrent requests for each distinct memory size (530). The memory area is reconfigured as needed into a second configuration of pools of fixed size memory buffers using the metrics collected (540, 550).

Reallocation of pools of fixed size buffers based on metrics collected

A write-once read-many memory system (10) for electronically securing a select portion of memory from being overwritten or erased. Memory system (10) includes one or more storage cells (25) for providing electronic storage of information. A control cell (13) is used for controlling writing and/or erasing access to the storage cells (25). Control logic (11) is provided to control access to the control cell (13). Control cell (13) and control logic (11) are used as a gate to provide selective access to storage cells (25) through write control line (19) and erase control line (21). Storage cells (25) can only be accessed when the control cell (13) in an appropriate logic state.

Write-once read-many memory using EEPROM cells

A communication device (100) includes three levels and at least one feature and at least one protocol for communicating with other communication devices. The three levels are high level or user ergonomics (302), common level or feature/protocol (310), and low level or hardware platform (318). The feature/protocol level (310) is adapted for controlling the at least one feature and the at least one protocol. The user ergonomics (302) includes a first interface (304) coupled to the feature/protocol level (310) for allowing the user ergonomics level (302) to change without affecting the feature/protocol level (310). The, hardware platform (318) includes a second interface coupled to the feature/protocol level (310) for allowing the hardware platform (318) to change without affecting the feature/protocol level (310) or the user ergonomics level (302).

Virtual radio interface and radio operating system for a communication

A selective call receiver receives a signal having a baud rate and comprising a number of phases. The number of phases are time division multiplexed to form the signal. The selective call receiver has selective call address information assigned thereto and includes a receiver for receiving and demodulating the signal and a memory for storing predetermined information. A demultiplexer is coupled to the receiver and the memory for demultiplexing the signal to recover one of the number of phases in response to the predetermined information and the baud rate. The selective call receiver also includes a decoder coupled to the demultiplexing means for decoding said one of said number of phases of said signal to derive a selective call message therefrom.

Selective call receiver for receiving a multiphase multiplexed signal

In radio processing control (11), a plurality of architectural layers (270, 290, 390) separate at least one of a plurality of tasks (272) from another task (292). For communicating among the tasks within (274, 276, 278) or across (229, 239) the layers, a buffer (300) for each of the tasks is provided by a communication resource (602). A messaging protocol for passing information from the tasks is defined to be a predefined information packet having a header (700) preceding any optional data. A flag portion (701) of the header designates the information as intralayer or interlayer. If the information is interlayer (229, 239), an identifier portion (703, 704) of the header identifies the source (272) of the information and an operation portion (702) identifies an operation code.

Method of communications between and within virtual radio interface

A signalling protocol comprising a plurality of interleaved phases is transmitted at various baud rates, the various baud rates being multiples of a base baud rate. The signalling protocol allows a selective call receiver to decode at an operating baud rate equivalent to the base baud rate irrespective of the transmission baud rate by decoding only a portion of the transmitted signal, the portion decoded determined by the baud rate and the address of the selective call receiver.

Time division multiplexed selective call system

A method and apparatus for coordinating the transfer of communications control from one independent radio communications system to another is disclosed. A remote unit which communicates data messages is associated with a home system which has a plurality of fixed sites and overlapping radio coverage areas. As the remote unit travels away from its home system, communications may be maintained by providing radio coverage from an independent roam system. The last message received by the home and roam systems from the remote unit has the associated radio signal strength and time of reception stored at each system. When a current message is transmitted by the remote unit and both the home and the roam system receive the message, the roam system time stamps the message and calculates the signal strength associated with the current message. If the amount of time elapsed between the last and the current message exceeds a predetermined amount of time or if the signal strength exceeds a predetermined threshold, the roam system requests transfer of control of the processing of the current message from the home system. When the home system receives this request, it calculates the difference in signal strength between the signal strength of the current message as received by the roam system and the signal strength of the current message as received by the home system. If the difference exceeds a predetermined amount, the request of the roam system to further process the message is granted.

Method and apparatus for coordinating independent communications systems

A communications system for carrying messages via a radio channel between one central site of a plurality of central sites and a plurality of two-way remote data units is disclosed. Each central site has a radio coverage area and each remote unit has a unique address and association with one of the central sites. When a message addressed to one of the remote units is received in a central site, a file of remote unit addresses is searched to find the location and central site association of the remote unit to which the message is addressed. If an address match is found indicating that the remote transceiver is in the coverage area of the message-receiving central site, the addressed message is stored and transmitted in that site. If an address match is found indicating that the remote transceiver is in another central site, the addressed message is conveyed to that site for transmission.

Two way personal message system with extended coverage

Growing community of inventors

Davie, FL, United States of America

Jerry L Sandvos