Lsi Logic Corporation

John P Daane

Michael D Rostoker

Sandeep Jaggi

Sanjay M Desai

D Tony Stelliga

Gobi R Padmanabhan

Visvamohan Yegnashankaran

James W Hively

Joseph M Zelayeta

Anthony Stelliga

A plurality of devices communicate information over a wireless network at radio frequencies. The information includes digital audio, video and data. Bandwidth among the devices is dynamically allocated, the allocation being based upon the needs of the devices. One embodiment of the wireless network is a Time Division Multiple Access network. Another embodiment is a wireless Ethernet. Yet another embodiment is a Frequency Division Multiplexed network.

Method and apparatus for increasing the effective bandwidth within a digital wireless network

A wireless communication unit for a wireless communication system transmits and receives video, audio and data signals within an RF bandwidth. The RF bandwidth is allocated among the video, audio and data signals to allow the video, audio and data signals to fit within the RF bandwidth. The allocation is performed by buffering the signals, making priority assignments to each of the buffered signals, and transmitting the buffered signals according to the priority assignments. The transmitted signals occupy the RF bandwidth in portions specified by the priority assignments. The priority assignments can be changed during a communication link. The subscriber unit receives a transmission header from another party on the communication link, which may include a request by the other party to change the priority assignments. If such a request is received, the subscriber unit automatically changes the priority assignments in response to the request. The communication unit is applicable to subscriber units and base stations. One such subscriber can be a cellular telephone having full-motion video capability.

Method and apparatus for the dynamic allocation of signal bandwidth

A wireless communication device may take the form of a cellular telephone, of a portable personal communication device, or even of a desk top personal computer which is equipped to communicate over the wireless cellular communication system in effect in a particular area. The wireless communication device is configured to self-adapt to various operating frequencies and communication protocols which may be present in the cellular communication environment so that the device is able to provide communications in several service areas even though the frequencies of operation and the communication protocols in use in the service areas may be incompatible with one another.

Multi-frequency wireless communication device

A digital network system accommodates a plurality of network protocols. The digital network system includes a backbone bus for communicating digital information. A first switching interface unit is coupled to the backbone bus and has at least one port connected to a first network. A second switching interface unit is also coupled to the backbone bus and has at least one port connected to a second network. The first and second interface units transferring digital information in first and second network protocols, respectively. First and second memories are coupled to the backbone bus and to the first and second switching interface units, respectively, and store digital information to be transferred between the switching interface units via the backbone bus. The first switching interface unit and the first memory are formed on a single substrate, and the second switching interface unit and the second memory are formed on a single substrate. A controller is coupled to the backbone bus and controls the transfer of digital information from the first switching interface unit to the second switching interface unit.

Network architecture

A single chip network interface apparatus includes a host interface circuit for communication with a host system bus, a network interface circuit for interfacing with a network bus, a dual port RAM coupled to the host interface circuit and also coupled to the network interface circuit, and a processor coupled to the dual port ram for converting packets of information between network protocol format and a format suitable for the host system bus.

High speed network interface having SAR plus physical interface

A wireless communication device may take the form of a cellular telephone, of a portable personal communication device, or even of a desk top personal computer which is equipped to communicate over the wireless cellular communication system in effect in a particular area. The wireless communication device is configured to self-adapt to various operating frequencies and communication protocols which may be present in the cellular communication environment so that the device is able to provide communications in several service areas even though the frequencies of operation and the communication protocols in use in the service areas may be incompatible with one another. The wireless communication device may also include facilities for transmitting and receiving video, graphics, and data files over an RF bandwidth. The various communication standards and protocols which may be used for these communications are recognized by the communication device, and it self-adapts to provide communications in the formats, standards, and operating frequencies which are available in particular cellular communication environments.

Multi-frequency multi-protocol wireless communication device

A network adapter formed on a single semiconductor substrate. The network adapter includes a host bus interface circuit adapted to be connected to a host data bus. A buffer memory is connected to the host bus interface circuit and temporarily stores digital information received from the host data bus. The digital information received from the host data bus are reformatted into packets according to a network protocol by a reformatting circuits. A processor and a network interface circuit are connected to the reformatting circuits. The processor controls the reformatting of the digital information. The network interface circuit is adapted to be connected to a digital network employing the network protocol.

Switched network hub on a chip

A single chip network adapter apparatus has each component disposed on a single semiconductor chip. The network adapter includes a host interface circuit which is adapted for connection directly to a host system bus. The host interface circuit sends information to and receives information form the host system bus, and has random access memory coupled thereto. A processor is coupled to the random access memory and formats information received from the host system bus to a network protocol format. The processor also converts information received in a network protocol format to a form suitable for the host system bus. A network interface circuit is coupled to the random access memory and is adapted for connection directly to a network. The network interface circuit sends information formatted by the processor to the network and receives information to be converted by the processor from the network.

Single chip network adapter apparatus

A remote connection digital processing device with network capability includes on a single chip asynchronous transfer mode (ATM) network protocol processing system interconnection circuits and Motion Picture Experts Group (MPEG) decoder circuits. The ATM interconnection circuits include a physical-layer medium dependent (PMD) unit connected to an ATM network. A transmission convergence (TC)/Framer unit is connected to the PMD unit. An ATM segmentation and reassembly (SAR) unit is connected to the PMD unit. Packet conversion logic is coupled to the ATM SAR unit for converting ATM packets to MPEG format. The MPEG decompression decoder circuits include a demodulator decryption unit coupled to the packet conversion logic. A video decoder is coupled to the demodulator decryption unit. An audio decoder is coupled to the demodulator decryption circuit. A display is coupled to the video decoder. Audio output devices are coupled to the audio decoder.

High speed single chip digital video network apparatus

The port in a packet network switching system that a packet should be associated with is determined by retrieving packet address information for a packet that is to be transmitted. A predetermined number of bits from the packet address information is selected to use a hash key, which is used to compute a table address. The contents of the table at that address are compared with the packet address information. If it matches, the packet is transmitted over the port associated with that particular destination address. If it does not match, the table address is incremented by one, and the contents of the new table location identified by the incremented address are compared with the packet address information. A high speed digital video network apparatus which utilizes the hashing function is implemented on a single integrated circuit chip, and includes a network protocol processing system interconnection, compression/decompression circuits, and encoder/decoder circuits.

Multi-port network adapter

A high speed digital video network apparatus is implemented on a single integrated circuit chip, and includes a network protocol processing system interconnection, compression/decompression circuits, and encoder/decoder circuits. The interconnection includes a packet conversion logic which converts between a network protocol, such as Asynchronous Transfer Mode (ATM) packets, and the data protocol used to handle large data streams, such as Motion Picture Experts Group (MPEG) packets. The interconnection further includes a Virtual Channel Memory (VCM) for storing ATM cells for segmentation and reassembly, a Direct Memory Access (DMA) controller for connecting the VCR to the compression/decompression circuits, a Parallel Cell Interface (PCI) for connecting the VCM to an ATM network, a Pacing Rate Unit (PCU) for automatically reducing the maximum transmission rate in response to a sensed congestion condition in the network, and a Reduced Instruction Set Computer (RISC) microprocessor for controlling the DMA controller and transfers between the memory, a host and the ATM network, for performing segmentation and reassembly of Conversion Sublayer Payload Data Units (CD-PDUs), and for performing conversion between the ATM Protocol and the MPEG protocol. The compression/decompression and decoder/encoder circuits may utilize MPEG to compress digitized images and motion video into compact data streams that can be moved across networks with bandwidths too narrow to accommodate the uncompressed data. The operating program for the RISC microprocessor is stored in a volatile Instruction Random Access Memory (IRAM) in the form of firmware which can be downloaded at initialization.

Method and apparatus for increasing the effective bandwidth of a digital

A personal interface system allows a user to access personal records on a database. Each user is provided with a personal interface device. The personal interface device is equipped with wireless and wired communication equipment, allowing a user to access the database anywhere, at any time. A measure of security is provided by a smart card, which must be inserted into the personal interface device.

Personal interface system for wireless and wired communications

A code mechanism is provided in an integrated circuit for identifying the integrated circuit such as by serial number or for use in enabling the circuit and equipment housing the circuit. Fuses, antifuses, and programmable field effect transistors are used in an array for establishing a code. The code can be established by loading a register through the array and then reading the register. Alternatively,the contents of the register can be compared with a code provided by a user to enable the circuit. In another embodiment, a ROM is loaded with a table of encryption keys, and a user addresses the ROM by loading an address in a register or in a RAM.

Semiconductor chip having identification/encryption code

A wireless communication unit for a wireless communication system transmits and receives video and audio signals over an RF bandwidth. The RF bandwidth is allocated among the audio and video signals to allow the audio and video signals to fit within the RF bandwidth. The allocation is performed by varying the rates of compression of the audio and video signals. The communication unit is applicable to subscriber units and base stations. Subscriber units such as cellular telephones can display the video images by using fast digital-to-analog converters and a dither technique. During a communication link, the subscriber unit receives a transmission header from another party on the communication link. The transmission header may include a request by the other party to change the allocation of the audio and video signals. If such a request is received, the subscriber unit automatically changes the allocation in response to the request.

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Saratoga, CA, United States of America

John P Daane