Qualcomm

About: Qualcomm is a company organization based out in Farnborough, United Kingdom. It is known for research contribution in the topics: Wireless & Signal. The organization has 19408 authors who have published 38405 publications receiving 804693 citations. The organization is also known as: Qualcomm Incorporated & Qualcomm, Inc..

Network Operation Strategies for Efficient Localization and Navigation

Abstract: Reliable and accurate position information is of great importance for many mass-market and emerging applications. Network localization and navigation (NLN) is a promising paradigm to provide such information ubiquitously, where a network of nodes is used to aid in localizing its members. This paper explores various network operation strategies, which play an essential role in NLN as they determine the network lifetime and localization accuracy. Efficient network operation requires several functionalities, including node prioritization, node activation, and node deployment. The roles of these functionalities are described and different techniques for implementing respective functionalities via algorithmic modules are introduced. Some important concepts such as cooperative operation, robustness guarantee, and distributed design in the development of the network operation strategies are also introduced. Finally, numerical results are provided to demonstrate the localization performance improvement attributed to the optimized network operation strategies.

Method and apparatus for access regulation and system protection of a dispatch system

Abstract: A method and apparatus to provide access to a dispatch system is disclosed. A communications manager (40) grants an exclusive system talker privilege to one remote unit (10) in the system at a time. After a remote unit (10) requests and is designated as the exclusive system talker, no other remote unit (20, 22) may transmit for a first pre-determined amount of time. After the first pre-determined time has elapsed, any other remote unit (20, 22) may request the exclusive system talker privilege and become the exclusive system talker. The exclusive system talker privilege is revoked by the communications manager (40) to any remote unit who retains the exclusive system talker privilege for more than a second pre-determined amount of time. The exclusive system talker privilege is also revoked upon the release of a push-to-talk button on a remote unit (10). Furthermore, a base station (44) in communication with a remote unit (10) designated as the exclusive system talker will generate a surrogate relinquishment request to the communications manager (40) if the exclusive system talker travels outside the coverage area of the system, loses power, or is destroyed.

System and method for managing spectrum allocation

Abstract: Disclosed are techniques for managing situations where spectrum use by one party is preempted by spectrum needs of another party. A revocation may be sent from a spectrum management system to secondary radio systems that are impacted by the presence of priority radio system. Remedial action may be taken if an acknowledgement of the revocation message is not received from a secondary radio system. Also, the secondary radio systems may transmit keep-alive messages to monitor operation of the communication pathway for the revocation messages.

Handoff between a wireless local area network and a cellular communication system

Abstract: Handoff between a wireless LAN and a cellular communication system is provided. A system is designed to provide nomadic cellular services including voice over I.E.E.E. 802.11. An 802.11 network is used as long as the voice quality is likely to be acceptable. Voice quality is measured and maintained to be at an acceptable level. If voice quality degrades below an acceptable level the design allows seamless call hand-off between the 802.11 and a CDMA 1xRTT network, for example.

Providing quality of service for various traffic flows in a communications environment

Abstract: The claimed subject matter relates to providing appropriate QoS treatment to one or more traffic flows associated with a terminal (102, 202), wherein the QoS treatment is defined within a profile (800) assigned to the terminal and implemented when the terminal requests access to a network. An access node (104, 204) can receive identifying indicia associated with the terminal and relays such indicia to an authentication and authorization server (AAS) (106, 206). The AAS can thereafter provide the access node with a profile that defines QoS treatment to associate with one or more traffic flows related to the terminal.