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Method for adapting bus and a bus

A bus and bus structure technology, applied in the direction of bus network, data exchange details, transmission system, etc., can solve the problems of increased power consumption and decreased transmission reliability, and achieve the effect of reducing system energy consumption and improving transmission capacity

Inactive Publication Date: 2008-11-19
NOKIA CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it also introduces some disadvantages, manifested as increased power consumption and reduced reliability of transmission

Method used

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  • Method for adapting bus and a bus
  • Method for adapting bus and a bus
  • Method for adapting bus and a bus

Examples

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Embodiment Construction

[0030] image 3 is a block diagram of a system including an example of a bus in accordance with the present invention. The system comprises several functional components, each of which includes its processing unit PU and bus interface unit IU. The difference from the structure in FIG. 1 is that the bus is divided into two parts, namely the first sub-bus 321 and the second sub-bus 322 . The interfaces to the first sub-bus are eg first 311, second 312 and third 313 functional units, and the interfaces to the second sub-bus are eg functional units 31u and 31n. Between the sub-buses there is a switching means 330 which comprises the switching part itself SW and the switching control unit SCU. Each line in the first sub-bus can be connected to a corresponding line in the second sub-bus via the switch unit. It is thus possible to keep the sub-buses separate or merge them together. Functional units are grouped in such a way that the functional units interfaced with a particular s...

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PUM

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Abstract

A method for adapting a bus to data traffic in a system comprising several functional units (311, 312, . . . , 31n) and a bus structure. The functional units are divided into at least two sets so that units, which mainly transfer data with each other belong to a same set and are interfaced with the same separate sub-bus (321; 322). The sub-buses can be united by switches (SW) into a more extensive bus, which is only used when data must be transferred between different sets. Supply voltage of each sub-bus is adjustable and is set the lower the less traffic there is on the bus. The parallel transfer operation makes it possible to increase the transfer capacity of the bus structure without increasing it's clock frequency. Furthermore energy consumption can be reduced by dropping the supply voltage of the bus circuits so that the bus retains the transfer capacity needed.

Description

technical field [0001] The invention relates to a method for adapting a bus to data traffic in a system comprising a plurality of functional components. The invention also relates to a bus structure capable of adapting to data traffic. Both the method and the bus structure are suitable for particular application in base stations and terminals of mobile communication networks. Background technique [0002] Systems and devices with a large number of software-implemented activities are typically implemented in a distributed fashion, so that there is one or more, usually processor-based, units for each necessary activity. To transfer data between components, a bus is needed to interconnect these components. The bus includes parallel lines for the data itself, address data and other control data. Each feature in the route contains a bus interface through which the bus can be used. The operation of the bus must be based on time division. Time division can in principle be asyn...

Claims

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Application Information

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IPC IPC(8): H04L12/40H04L12/407H04L12/44
CPCH04L12/407H04L12/4625H04L12/44H04L12/10H04L12/40
Inventor J·帕维艾南T·赫梅莱南K·库斯林纳
Owner NOKIA CORP
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