摘要:
A cache line index for an address cache entry is calculated by organizing an address such as a Media Access Control (“MAC”) address into a plurality of intermediate elements, barrel shifting the bits of at least one of the intermediate elements in accordance with predetermined criteria, and folding the intermediate address elements together with an exclusive-OR function. A Virtual Local Area Network (“VLAN”) index may also be included in cache line index calculation. The VLAN index enables segmentation of the cache into virtual tables. The tag portion of the cache entry includes a subset of the complete set of intermediate elements. The intermediate elements in the cache entry can be employed in conjunction with the cache line index to recover the original MAC address. Hence, the size of the tag portion of the address cache entry is reduced relative to the full MAC address without a reduction in the information content of the entry.
摘要:
An arbiter circuit is employed to isolate a processor from a plurality of Input/Output Application Specific Integrated Circuits ("I/O ASICs"). The processor is coupled to the arbiter through a control bus, an address bus and a data bus. The arbiter is coupled to the I/O ASICs through an extension of the control bus and a combined address/data bus. The arbiter manages control of the control bus extension and address/data bus to enable contemporaneous transmission ("broadcast") of messages to the I/O ASICs, and enable the processor to access the I/O ASICs. Only one of the I/O ASICs is granted control of the control bus extension and address/data bus at any point in time. The processor may also be granted sole control of the control bus extension and address/data bus.
摘要翻译:采用仲裁电路将处理器与多个输入/输出专用集成电路(“I / O ASIC”)隔离开来。 处理器通过控制总线,地址总线和数据总线耦合到仲裁器。 仲裁器通过控制总线的扩展和组合的地址/数据总线耦合到I / O ASIC。 仲裁器管理控制总线扩展和地址/数据总线的控制,以实现向I / O ASIC同时传输(“广播”)消息,并使处理器能够访问I / O ASIC。 只有其中一个I / O ASIC被授权在任何时间点控制总线扩展和地址/数据总线。 处理器也可以被授予对控制总线扩展和地址/数据总线的唯一控制。
摘要:
A variable rate transmission system where a packet of variable rate data is transmitted on a traffic channel if the capacity of the traffic channel is greater than or equal to the data rate of the packet. When the rate of the packet of variable rate data exceeds the capacity of the traffic channel, the packet is transmitted on a traffic channel and at least one overflow channel. Also described is a receiving system for receiving and reassembling the data transmitted on the traffic channel and at least one additional overflow channel.
摘要:
A handoff technique in which system users detect transitions in service between a current service area and an adjacent service area, and request a forward link channel in the new service area when a detected signal strength for the new service area exceeds predetermined threshold levels. The forward communications link in the current service area is maintained until the strength of the new service area signal reaches a certain level and appropriate channel quality is confirmed, as based on various known criteria. Typically, service area transitions are detected using the signal strength of pilot or paging signals associated with service areas, which are used to determine a relative signal strength of new service area signals. Pilot signal level adjustments used to counter roll-off effects are detected and compensated for in comparing signal levels. To minimize the burden on system resources, new service area signals are not selectable until a minimum time has passed, or a minimum change in energy from a prior pilot signal is detected. In addition, communications using the previous service area can be dropped almost immediately upon engaging the new service area.
摘要:
Flow of data units to an address resolution processor is controlled to inhibit multiple data units from a single multicast flow from being enqueued with the address resolution processor. In a switch having a plurality of Input/Output Application Specific Integrated Circuits (“I/O ASICs”) with a plurality of ports, no more than one data unit from each I/O ASIC is permitted to be enqueued with the address resolution processor at any point in time. A separate learn pending indicator may be defined for each I/O ASIC in the switch.
摘要翻译:控制数据单元到地址解析处理器的流程,以阻止来自单个多播流的多个数据单元与地址解析处理器一起排队。 在具有多个具有多个端口的多个输入/输出专用集成电路(“I / O ASIC”)的开关中,来自每个I / O ASIC的不超过一个数据单元被允许用地址解析处理器 在任何时间点。 可以为交换机中的每个I / O ASIC定义单独的学习挂起指示符。
摘要:
A belt measurement device comprising a first portion and a second portion, the first and second portion are substantially parallel, the first portion and second portion defining a predetermined engagement position for the device in a belt, and, a switch cooperatively disposed with the first portion and second portion, the switch capable of closing a circuit by being compressed between a belt surface and the device, a light is illuminated upon the switch closing the circuit.
摘要:
A satellite communication system for providing communications between user terminals and gateways constituted with m primary satellites. In one embodiment, n back up satellites are also provided. Further, each satellite, primary or back-up, is equipped to project N/m beams onto and across an area in a loosely-packed array manner. M of the m primary and n back-up satellites collectively create N beam spots to cover the area. Moreover, each sub-area is covered by a beam spot separated from another sub-area covered by another beam spot by one beam width. Each satellite is also equipped to facilitate communication over 1 of m band of frequencies on one beam. As a result, any of the m primary satellites may be efficiently replaced on demand by a selected one of the n back-up satellites. The gateways and user terminals are configured to communicate signals through or with both or either the primary and back-up satellites.
摘要:
An electronic intermediary electronically connects with a tax data provider and collects electronically tax data from the tax data provider. The electronic intermediary processes the tax data collected electronically, and prepares an electronic tax return using the processed tax data.
摘要:
An electronic intermediary electronically connects with a tax data provider and collects electronically tax data from the tax data provider. The electronic intermediary processes the tax data collected electronically, and prepares an electronic tax return using the processed tax data. The electronic intermediary connects electronically with a taxing authority, files the electronic tax return with the taxing authority, and arranges electronically for the payment or receipt of any tax liability or refund, respectively.
摘要:
The invention provides a layered channel software element which supervises the operation of channel element modem resources in a CDMA cellular telephone system that includes forward channels for conveying message and signalling data from a CDMA system base station to mobile units and reverse channels for conveying message and signalling data from mobile units to base stations. Each channel is implemented in a channel element including a general purpose processor and a modem application-specific integrated circuit ASIC. The layered channel software element executes on the general processor. The layered channel software element provides a structure and function for transferring message and signalling data between the telecommunication system and the modem ASIC and also for establishing channel operations by providing channel configuration information to the modem ASIC.