Qualcomm Incorporated

Other

Gadi Karmi

Matthew Stuart Grob

Paul E Bender

Robert Howard Kimball

Edward George Tiedemann, Jr

Roberto Padovani

David S Propach

Paul Eric Jacobs

Bibhu P Mohanty

Frank Quick

Peter J Black

Nagabhushana T Sindhushayana

Lindsay A Weaver, Jr

Noam A Ziv

Greg M Hoagland

Kuo-Chun Lee

Klein S Gilhousen

Todd Robert Sutton

Gwain Bayley

Barry R Robbins

Robert D Blakeney, Ii

Alejandro Raul Holcman

Roy F Quick

Venkat Tangirala

David B Munsinger

Toni Lee Holcman

Robertó Padovani

Steven P Stachwick

Robert C Ottinger

Suzanne M Lueder

Lindsay A Jnr Weaver

Robert H c/o Qualcomm Incorporated Kimball

Matthew S c/o Qualcom Incorporated Grob

A communication system that allows a soft handoff to be completed, even when the communications link between the active base station and the mobile station deteriorates before the mobile station has received the handoff direction message. The mobile station maintains a list of base stations that the mobile station is in communication with, referred to as an 'Active Set'. In addition, the mobile station maintains another list of base stations that are proximate to the base stations in the active set. This list is referred to as the 'Neighbor Set'. In accordance with the disclosed method and apparatus, the mobile station places a base station in the active set upon including the base station in a pilot strength measurement message (PSMM). The mobile station monitors transmissions from all of the base stations on the active set to receive a handoff direction message (HDM).

Method and apparatus for robust handoff in wireless communication systems

A mobile user terminalaccesses a packet data networkthrough one or more of several network access points-. One or more control points-determines which network access point or points the user terminal is to access. Control may be retained in the current control point, or transferred to another control point, whenever it is convenient. There are preferably several routers, each having an associated home agent-which determines which foreign agents need to be accessed on behalf of each user terminal. There are several foreign agents-, which forward packets received from a user terminal's home agent to the control point currently controlling communications with the user terminal.

Distributed infrastructure for wireless data communications

A variable rate transmission system transmits a variable rate data packet including an accompanying rate indication signal indicative of the transmission rate of the variable data packet. The data packet can be spread using a long pseudonoise (PN) code, the mask of which can be selected in accordance with the transmission rate of the variable rate data packet. A preamble, providing the transmission rate, can be punctured into an outgoing pilot signal. The rate indication signal can be encoded in accordance with a set of orthogonal functions that are part of the indication of the transmission rate of the data packet.

Method and apparatus for transmitting and receiving variable rate data

A mobile user terminalaccesses a packet data networkthrough one or more of several network access points-One or more control points-determines which network access point or points the user terminal is to access. Control may be retained in the current control point, or transferred to another control point, whenever it is convenient. There are preferably several routers, each having an associated home agent-which determines which foreign agents need to be accessed on behalf of each user terminal. There are several foreign agents-, which forward packets received from a user terminal's home agent to the control point currently controlling communications with the user terminal.

A method and apparatus for rapidly assigning traffic channels to a plurality of mobile stations in a wide area high-speed packet data cellular communication system. Mobile stations transmit access probes on randomly selected access channels to selected base stations to initiate traffic channel assignments. The access probe comprises a pilot preamble, a traffic channel request, and a pilot/data request channel (DRC). The pilot preamble allows the selected base station to easily detect the access probe transmission. The traffic channel request includes data that identifies the mobile station. Immediately after transmitting the traffic channel request, the mobile station begins communicating with the base station on both the forward and reverse communication links. The selected base station immediately supervises the mobile station's transmission power. The mobile station selects from a group of available power control sub-channels. The mobile station selects an available channel and an associated power control sub-channel from the list.

Method and apparatus for rapid assignment of a traffic channel in digital cellular communication systems

In a system including a resource which is shared among a number of users, it is difficult to distribute the available capacity of the resources fairly among the users and still maximize resource utilization. Additionally, it is desirable to allow at least some of the control over usage rates to remain with the users, while at the same time avoiding situations where the resource is overloaded. A system and method are disclosed wherein usage rates are selected from among a set of available rates according to a set of persistence vectors.

System and method for persistence vector based rate assignment

System and method for persistence-vector-based rate assignment

A system and method for providing a simple, but effective technique for communicating overhead messages in a wireless communication system providing access to a decentralized network, while achieving bandwidth savings as well as minimizing power consumption. In one embodiment, a wireless base station which is connected to a decentralized network transmits a sequence of signatures for overhead messages to a mobile unit. The mobile unit wakes up receives the signatures and compares them to signatures stored at the mobile unit. If the signatures received by the mobile unit are different from the signatures stored at the mobile unit, the mobile unit stays awake to receive the overhead messages to be transmitted by the wireless base station. If the signatures received by the mobile unit are the same as the signatures stored at the mobile unit, the mobile unit may go back to sleep.

Overhead message update with decentralized control

A mobile user terminalaccesses a packet data networkthrough one or more of several network access points. One or more control pointsdetermines which network access point or points the user terminal is to access. Control may be retained in the current control point, or transferred to another control point, whenever it is convenient. There are preferably several routers, each having an associated home agentwhich determines which foreign agents need to be accessed on behalf of each user terminal. There are several foreign agents, which forward packets received from a user terminal's home agent to the control point currently controlling communications with the user terminal.

A communication system that allows a soft handoff to be completed, even when the communications link between the active base station and the mobile station deteriorates before the mobile station has received the handoff direction message. The mobile station maintains a list of base stations that the mobile station is in communication with, referred to as an 'Active Set'. In addition, the mobile station maintains another list of base stations that are proximate to the base stations in the active set. This list is referred to as the 'Neighbor Set'. A memory within the mobile station includes information that would allow the mobile station to demodulate information transmitted from those base stations on the neighbor set. In accordance with the disclosed method and apparatus, the mobile station places a base station in the active set upon including the base station in a pilot strength measurement message (PSMM). The mobile station monitors transmissions from all of the base stations on the active set to receive a handoff direction message (HDM).

Method for robust handoff in wireless communication system

The layers and protocols of an air interface layering architecture are designed to be modular and can be modified and upgraded to support new features, perform complex tasks, and implement additional functionality. Prior to commencement of data communication between a first entity (e.g., an access terminal) and a second entity (e.g., a radio network), a set of layers and/or protocols is selected for negotiation. For each selected layer and protocol (i.e., each attribute), a list of attribute values considered acceptable to the first entity is determined. The selected attributes and their associated attribute values are sent from the first entity and, in response, a list of processed attributes and their associated lists of processed attribute values are received. Each list of processed attribute values includes attribute values considered acceptable to the second entity. The layers and protocols in the first entity are then configured in accordance with the received list of processed attributes and their associated processed attribute values. Other features related to configurable layers and protocols are also provided.

Method and apparatus for providing configurable layers and protocols in a communications system

An apparatus and method of providing a reliable method of entering command mode and executing modem commands with a modem comprising a wireless communications channel. A wireless communications channel inserted into a standard modem configuration splits the functions of the modem between a mobile unit and a base station. When the system enters command mode, only the base station equipment changes state. The mobile unit continues to operate in the same manner as when the system is in data mode. Any command issued in command mode requiring action from the mobile unit is first sent to the base station. The base station recognizes that the command is intended for the mobile unit and sends a mobile unit-command over an independent private command channel to the mobile unit. The mobile unit constantly monitors the private channel regardless of the state of the system. The mobile unit receives the command on the private command channel, executes the command, and returns any required result code to the terminal equipment.

Method and apparatus of providing a single state mobile unit in a modem connection comprising a wireless link

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San Diego, CA, United States of America

Gadi Karmi