Base station

About: Base station is a research topic. Over the lifetime, 85883 publications have been published within this topic receiving 1019303 citations. The topic is also known as: Mobile phone base stations & BS.

Authentication system for mobile entities

Abstract: Verification and authentication methods for use in mobile communications systems where base stations (110) do not have direct access to a shared secret common to a security server (101) and a mobile node (112, 114) are described. Unilateral authentication of a mobile node by a base station is augmented through the use of a mutual authentication token (MAT) generated by the security server and the mobile node as a function of the shared secret. With each handoff the MAT generated by the security server is passed from base station (110) to base station (110', 110'') via a secure communications channel. After each handoff the mobile node and new base station perform a unilateral authentication operation and establish a new encryption key that is a function of the MAT. Existence of a trust relationship between a new base station and the last base station is verified by the new base station's ability to properly encrypt data.

System for remote computer control using message broadcasting system

Abstract: A system for remote control of a mobile computer system from a base computer system, where the base system generates control command tokens which are broadcast over a pager system. A communicator including a pager receiver, which is normally in a standby state, is connected to the mobile computer, which is normally in an off state, and receives the command tokens. Stored in both the base computer and the mobile computer is a table of commands, cross-referenced with the command tokens. The command tokens are used to instruct the mobile computer to take a variety of actions, including telephoning the base computer, informing the base computer of the mobile computer's location, exchanging file update information and application version information, and other actions requiring communication between the base station and the remote station. The communicator includes a local CPU and SRAM, and powers up the mobile computer as necessary. Certain commands and information exchange may be carried out by the local CPU without powering up the mobile computer.

Wireless 911 emergency location

Abstract: A system arrangement and method are disclosed for determining location of a wireless mobile unit involved in a call for public emergency assistance (e.g. a "911" call). The system is cost-effective in that it makes extensive use of existing telecommunication infrastructures, and does not require either special hardware or software at either the mobile unit site or the emergency assistance center handling a call. The system features shared use of a computer and specially defined database among a plurality of mobile switching offices serving a larger plurality of mobile base stations, the latter serving an even larger plurality of antenna and transceiving sites within predefined cellular regions. Signal strength measurements at the base stations are passed through the switching offices to a shared computer, and the latter uses the measurements to calculate a small area for which it would be practical to conduct a search if the mobile unit user requiring assistance is unable to help in determining his/her location. The calculated area and database are used to furnish the emergency assistance center handling the call with a detailed mapping of the calculated area, highlighting specific features (terrain, buildings, signs, etc.) that could be used to question the caller in a manner likely to produce responses from which the caller's location could be either precisely fixed or at least narrowed to a small part of the mapped area.

The COST 259 Directional Channel Model-Part II: Macrocells

Abstract: This paper describes the attributes of the COST 259 directional channel model that are applicable for use in the design and implementation of macrocellular mobile and portable radio systems and associated technology. Special care has been taken to model all propagation mechanisms that are currently understood to contribute to the characteristics of practical macrocellular channels and confirm that large scale, small scale, and directional characteristics of implemented models are realistic through their comparison with available measured data. The model that is described makes full use of previously published work, as well as incorporating some new results. It is considered that its implementation should contribute to a too) that can be used for simulations and comparison of different aspects of a large variety of wireless communication systems, including those that exploit the spatial aspects of radio channels, as, for example, through the use of adaptive antenna systems

Method and apparatus for bar code association for wireless network

Abstract: A wireless network having a base station adapted for wireless communications, a wireless bar code scanner and a network ID label having a bar code symbol printed thereon. The bar code symbol includes encoded information pertaining to the base station. A wireless bar code scanner is adapted to scan and decode the network ID label. The wireless bar code scanner initiates a communications link with the base station utilizing information from the decoded network ID label. The wireless bar code scanner includes a light source for illuminating a printed bar code symbol, an electro-optical element for imaging the printed bar code symbol, a decoder for decoding the imaged printed bar code symbol into an alphanumeric string, and an input/output device for conducting wireless communications with the base station.