摘要:
A system for performing transmit power and admission control for a satellite based wireless communication systems. Admission control uses centralized admission and distributed admission controls. Centralized admission control uses a maximum persistence value broadcasted from a hub to terminals. Persistence is the probability that a transmission will timely occur. Each terminal transmits a persistence that is no greater than the maximum persistence value. If the transmission fails, the transmission is repeated using the same probability. Lowering the persistence introduces a delay for alleviating congestion. Power control is performed using centralized and distributed power control. Centralized power control uses power control commands transmitted from the hub to each terminal. When an acknowledge is not received, a backoff and recovery procedure is performed. Distributed power control is performed during the recovery process when a terminal fails to receive an acknowledgment message after a predetermined number of attempts.
摘要:
A method of dynamically allocating bandwidth of channels to cells in a communications cellular network according to user demand. Groups of cells are formed so as to minimize interference within each group, and a particular channel is assigned to each of the groups. The bandwidth of each channel then is dynamically allocated by time division to each of the cells in the assigned group according to user demand in each of the cells thereof.
摘要:
A method for conveying packet data from a CDMA mobile station to a GSM network, including communicating with a GSM service node to establish a data link from the mobile station to the network via a radio communications base station. The packet data are conveyed between the mobile station and the base station over a CDMA air interface and are then transferred over the link between the base station and the network.
摘要:
Techniques are provided for desktop delivery in a distributed enterprise. In one embodiment, a system comprises multiple computing devices that are communicatively connected to a data center. The data center comprises a separate virtual disk for each separate computing device. A virtual disk for a computing device comprises an image that includes: an Operating system (OS) for the computing device; one or more applications for a user of the computing device; a machine profile associated with the computing device; and user data and settings that are specific for the user of the computing device. The data center also comprises logic which is stored in a storage medium and which, when executed at the data center, is operable at least to: send the image to the computing device; receive, from the computing device, changes made by the user at the computing device to each of the OS, the one or more applications, and the user data; and update the image for the computing device by applying the changes to each of the OS, the one or more applications, and the user data.
摘要:
A communications network having a number of routers, a number of base stations and a number of mobile units maintains communications with the mobile units by assigning a unique address known to the routing entities of the network to each mobile unit. By including the mobile units unique address in topology updates of the network, the location of the mobile unit at any time is made known to all routers of the network. That is, once a mobile unit moves into a domain of a new access point and establishes a new link with the new access point, it uses the topology update mechanism of the network to make its new location known to all routers. Once a router of the network receives topology update information specific to the mobile unit's new location, it updates its routing table such that packets destined to the mobile unit are routed in a path which terminates at the mobile unit and contains its new access point.
摘要:
Techniques are provided for desktop delivery in a distributed enterprise. In one embodiment, a system comprises multiple computing devices that are communicatively connected to a data center. The data center comprises a separate virtual disk for each separate computing device. A virtual disk for a computing device comprises an image that includes: an Operating system (OS) for the computing device; one or more applications for a user of the computing device; a machine profile associated with the computing device; and user data and settings that are specific for the user of the computing device. The data center also comprises logic which is stored in a storage medium and which, when executed at the data center, is operable at least to: send the image to the computing device; receive, from the computing device, changes made by the user at the computing device to each of the OS, the one or more applications, and the user data; and update the image for the computing device by applying the changes to each of the OS, the one or more applications, and the user data.
摘要:
Techniques are provided for desktop delivery in a distributed enterprise. In one embodiment, a system comprises multiple computing devices that are communicatively connected to a data center. The data center comprises a separate virtual disk for each separate computing device. A virtual disk for a computing device comprises an image that includes: an Operating system (OS) for the computing device; one or more applications for a user of the computing device; a machine profile associated with the computing device; and user data and settings that are specific for the user of the computing device. The data center also comprises logic which is stored in a storage medium and which, when executed at the data center, is operable at least to: send the image to the computing device; receive, from the computing device, changes made by the user at the computing device to each of the OS, the one or more applications, and the user data; and update the image for the computing device by applying the changes to each of the OS, the one or more applications, and the user data.
摘要:
A method and apparatus for efficiently tracking the location of a mobile station in a cellular network, especially in cellular networks having nonuniform traffic distribution. A mobile station reports to a base station only upon entering selected reporting cells. When communication with a mobile station is desired, the station is searched for in the vicinity of the last reporting cell in which the station appeared. The vicinity of a reporting cell is defined as the set of all intersecting cells reachable from the reporting cell without passing through another reporting cell.
摘要:
A method for use in multicellular communication network system of the type having base stations and a plurality of remote stations. The method achieves reliable and fault tolerant synchronization between the stations in a call when a frequency hopping technique is used. The method includes steps for acquiring the frequency hop sequence by remote station and tracking the frequency hop sequence after acquisition in order to stay in synchronism. The method also provides for recovering from loss of synchronism and for staying in synchronism.
摘要:
Techniques are provided for desktop delivery in a distributed enterprise. In one embodiment, a system comprises multiple computing devices that are communicatively connected to a data center. The data center comprises a separate virtual disk for each separate computing device. A virtual disk for a computing device comprises an image that includes: an Operating system (OS) for the computing device; one or more applications for a user of the computing device; a machine profile associated with the computing device; and user data and settings that are specific for the user of the computing device. The data center also comprises logic which is stored in a storage medium and which, when executed at the data center, is operable at least to: send the image to the computing device; receive, from the computing device, changes made by the user at the computing device to each of the OS, the one or more applications, and the user data; and update the image for the computing device by applying the changes to each of the OS, the one or more applications, and the user data.