Telefonaktiebolaget Lm Ericsson (publ)

Kenzo Urabe

Toshikane Oda

Yoshio Honda

Leif Axelsson

Kazushige Yamamoto

H&aring;kan Eriksson

Paul Wilkerson Dent

Martin J Jonson

A system for efficient routing in a multiple hop wireless communication network comprising a plurality of network nodes is presented. The system acquires quality information indicating link status between the infrastructure nodes. The link quality information is used in a route determination process in the infrastructure nodes using a predictive procedure. The link quality information includes information about a time varying information of the link status. The predictive procedure uses the time varying information of link status, and a router data packets according to the determined route.

Predictive ad-hoc network routing

The present invention relates to a method for efficient routing in a multiple hop wireless communication network. The routing method comprise the steps of providing link status information by acquiring link status quality between nodes in the network, updating a routing element () with said link status information, determining an appropriate route according to said link status information with respect to traffic content, and routing traffic according to said determined appropriate route.

Method and system for routing traffic in ad hoc networks

The present invention relates to a method for efficient routing in a multiple hop wireless communication network. The invention is characterized in that data packets are routed over transmission paths using the following steps providing link status information by acquiring link status quality between nodes in the network, updating a routing element () with said link status information, determining possible routes with essentially similar link quality status for said data packet, and routing said data packet via the determined routes.

Method and system for efficient routing in Ad Hoc networks

A matched filter requiring no high-speed processor and which consumes less power is disclosed. Partial filtersN obtained by dividing number of matched filter taps by N are provided with a controllerfor controlling which partial filters are enabled. The controlleris supplied with maximum amount of delay of an input signal and with symbol timing. On the basis of the maximum amount of delay, the controllerenables only the minimum number of partial filtersthat are capable of executing an amount of computation that is required in one symbol period. The enabled partial filters are used multiple number of times per symbol period and the output, each time, integrated sample by sample. Since the disabled partial filters will not operate, it is possible to reduce power consumption and computation time.

Matched filter and receiver for mobile radio communication system

A first searcher searches a first channel (e.g., a broadcast channel), a second searcher searches a second channel (e.g., a traffic channel), and the second searcher uses information from the first searcher to search the second channel. In one aspect of the invention, the first searcher generates a delay profile for the first channel. A second searcher uses the delay profile to generate a set of taps for the second channel. In another aspect of the invention, the first searcher is configured to find a maximum correlation value (or a set of maximum correlation values). The second searcher shifts a search finger by an amount equal to the delay corresponding to the maximum correlation value(s). The second searcher can also shift a code corresponding to the second signal by an amount equal to the sum of the delay corresponding to the maximum correlation value(s) and a predetermined value.

Method and apparatus for configuring a RAKE receiver

A matched filter for use in a radio telephone receiver that receives Code Division Multiple Access (CDMA) signals. The matched filter produces precombinations of input values to significantly reduce the number of multiplication and addition operations, compared to conventional matched filters, required to produce a correlation value. This reduced number of required operations, along with a reduced number of delay elements required to despread CDMA signals, significantly reduces the overall power consumption of the matched filter. The use of such a matched filter in a device like a cellular phone, for example, would thus lead to longer battery life.

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Yokohama, Japan

Kenzo Urabe