Abstract: A method for generating a preamble sequence and determining a cyclic shift. The method includes: when set a piece of root sequence can only generate one preamble sequence and there is no cyclic shift restriction, setting the cyclic shift step length NCS to be equal to 0 and the corresponding cyclic shift amount Cv=0, at this time the root sequence is directly used as the preamble sequence; when set a piece of root sequence can generate a plurality of preamble sequences and there is no cyclic shift restriction, the cyclic shift step length NCS being not equal to 0, at this time the cyclic shift amount Cv=v·NCS, wherein v=0, 1, 2, . . . , ?NZC/NCS??1. This method is applied to the situation that a root sequence generates a preamble sequence, and the method for generating the preamble sequence is simple and easy to operate.

Abstract: Instant messaging (IM) users in a wireless network are allowed to automatically set their presence status based on their geographical location. A conventional Mobile IM (MIM) client, such as a Brew application, allows an IM user to set his presence status, e.g. “Online,” “Away,” etc. This status is transmitted to the IM server which then publishes this status to other IM users. As disclosed herein, location based presence populates the device position automatically into the presence status or other IM communications. For example, selection of a menu choice <My Location> causes the disclosed MIM client to insert the street address of the current location into the presence status. The disclosed client obtains the location information by working with elements of a location based service (LBS) platform of a wireless mobile communication network, such as a location proxy server (LPS) and a position determining entity (PDE).

Abstract: A method is disclosed for determining the correctness of proposed values or data for engineering parameters. The method incorporates the use of a server side computer and a client side computer connected to each other via an electronic network. The method includes the steps of obtaining a knowledge base of data. The knowledge base is stored on the server side computer. Proposed values or data are generated at the client side computer using an applet. The proposed data is then transmitted over the network from the client side computer to the server side network. The proposed data is then compared against the knowledge base of data using a servlet designed to invoke and utilize computers other than the server side computer that may have rules or facts necessary to test the proposed data. The results are prepared and then transmitted from the server side computer to the client side computer. The client side computer does not require a proprietary application to be resident therein.