Motorola Corporation

Motorola Mobility LLC

Bin Liu

Charbel Khawand

Jianping W Miller

Jean Khawand

A multiprocessor system () for sharing memory has a memory (), and two or more processors (). The processors are programmed to establish () memory buffer pools between the processors, and for each memory buffer pool, establish () an array of buffer pointers that point to corresponding memory buffers. The processors are further programmed to, for each array of buffer pointers, establish () a consumption pointer for the processor owning the memory buffer pool, and a release pointer for another processor sharing said memory buffer pool, each pointer initially pointing to a predetermined location of the array, and adjust (-) the consumption and release pointers according to buffers consumed and released.

Method and apparatus using buffer pools and arrays of buffer pointers for sharing memory in a multiprocessor system

A method of communicating with a transceiver (). In one arrangement, the method of communicating with the transceiver can be performed in a systemless group environment. Synchronization information () can be received from a mobile transceiver () and used to synchronize to the mobile transceiver. The synchronization information can include a timing offset and a frequency offset. Synchronization can be maintained until a predetermined condition is met, for example, a predetermined amount of group inactivity.

Group call management through receive/transmit synchronization

An IPC protocol/network allows for intelligent targeting of nodes in order to reduce overhead and provide for improved power management. The IPC server keeps track of the IPC network's node activity and using an operational state table () it can determine which node can handle a service request (e.g., MP3 decode). By keeping track of the current operational condition of the nodes within the network, the processors can have better battery life and application latency can be improved. The IPC server will keep track not only of which nodes can handle which services, but it will also know which node can handle the service request given its knowledge of the operational state of each of the nodes.

Interprocessor communication protocol providing intelligent targeting of nodes

Half duplex, Frequency Hopped-Spread Spectrum wireless transceivers (), operating without a central controller, maintain time synchronization with the frequency hopping sequence for a period after transmission of a half duplex signal ceases. The wireless transceiver () operates their receivers () according to the RF frequency hopping sequence and schedule (). The wireless transceiver () is then able to send a short transmission request to signal that it will start transmitting on the Frequency Hopping schedule () of the previously ceased transmission. A wireless transceiver () that was either the original transmitter or the original receiver is able to transmit this transmission request. A subset of time slots within the hopping schedule () can be optionally assigned to the original transmitter and original receiver to obviate collisions of the transmit request transmissions from both device at the same time.

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Weston, FL, United States of America

Bin Liu