Sprint Spectrum L.p.

Frederick L Fortuna

Dae-Sik Oh

Mark Yarkosky

Timothy Wayne Sill

John Cheong-Wai Ngan

A wireless telecommunications network that uses a first frequency spectrum for wireless communications in a plurality of generally contiguous wireless coverage areas also has available a second frequency spectrum for wireless communications in a high-traffic wireless coverage area. Mobile stations in the high-traffic wireless coverage area are classified as either static or dynamic based on determinations of their speeds. The wireless telecommunications network uses the first frequency spectrum for wireless communications with dynamic mobile stations in the high-traffic wireless coverage area and uses the second frequency spectrum for wireless communications with static mobile station in the high-traffic wireless coverage area. The wireless telecommunications network may instruct the mobile stations in the high-traffic coverage area to use the appropriate frequency spectrum.

Method and system for frequency usage

A method and system of communicating between a base station and a mobile station is disclosed. The base station may be the core of a cell site, which is defined by radio frequency radiation patterns. The cell site may be divided into a number of sectors, each defined respectively by radiation patterns. The mobile station, while within any of the sectors of the cell site, may communicate with the base station on a reverse link by encoding signals using a spreading sequence offset by a common time delay. On the forward link, each sector is assigned a respective time delay that is within the common time delay. While within a respective sector of the cell site, the mobile station may receive signals from the base station on the forward link that have been encoded with the spreading sequence offset by the sector's respective time delay.

Method and system of spread spectrum modulation

A wireless telecommunications network includes a mobile switching center (MSC) that controls a plurality of base stations. Each base station defines one or more wireless coverage areas, which may be termed 'cells' or 'sectors.' Associated with each of these wireless coverage areas is a &#x201c;neighbor list&#x201d; that lists a number of other wireless coverage areas to which handoffs are preferably made. The MSC has access to a database of handoff statistics and to a database of neighbor lists for the wireless coverage areas that it controls. The handoff statistics provide an indication of the frequencies at which handoffs have occurred between the various wireless coverage areas. To tune a neighbor list for a given wireless coverage area, the other wireless coverage areas are ranked based on the frequency of handoffs involving that wireless coverage area and the given wireless coverage area, as reflected in the handoff statistics. The wireless coverage areas with the highest handoff frequencies are added to the neighbor list for the given wireless coverage area. In preferred embodiments, the wireless coverage areas in a neighbor list may be further categorized into a first priority set, a second priority set, and a third priority set, based on their handoff frequencies.

Method of tuning handoff neighbor lists

A method for allocating identifiers in a cellular wireless network. The method may determine the optimal distribution of identifiers, such as pseudo-random offset numbers, to the sectors and cells of a Code Division Multiple Access cellular wireless system. The method may ensure that those identifiers that are used more than once by the system are allocated to sectors that are as far apart as possible. The method allocates identifiers preferentially to sectors in more tightly packed regions of the network. Then the method determines how widely spread the identifiers are. Sectors with identifiers that are near each other are then preferentially reallocated their identifiers. The method repeats determining the spread of identifiers and reallocating the identifiers until the sectors retain the same identifiers, thereby reflecting a stable allocation of identifiers in the cellular wireless system.

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Overland Park, KS, United States of America

Frederick L Fortuna