Abstract:
A system and method for the reception of content items, including the ability to handle (107) a plurality of service announcement formats and the ability to select (113), for a plurality of network access points, the best access point for receiving items.
Abstract:
A compression context for a plurality of packets is established with a receiving device. Each of these packets is associated with one or more reliable multicast protocols, such as the Layered Coding Transform (LCT) protocol, the Asynchronous Layered Coding (ALC) protocol, the FLUTE protocol, the MUPPET protocol, and the NACK-Oriented Reliable Multicast (NORM) protocol. Upon establishment of the compression context, a compressed packet is generated for one of the plurality of packets and transmitted to the receiving device. The compressed packet has a reduced number of bits in its header. Upon receipt, the receiving device decompresses the compressed packet based on the compression context.
Abstract:
A method for increasing a user's (101) perceived access speed to content available from a data network.(104) .The method utilizes a multicast channel (114) and the selection of group data (108) to be sent over that channel (114).
Abstract:
A method and system for performing multicast broadcast handover in a wireless data network are disclosed. Each cell broadcasts administrative announcements over a logical channel to mobile terminals (101). The announcements indicate which multicast broadcasts are available in specified cells, as well as connection information for each cell (103). The mobile terminals may tune to a multicast broadcast as defined by the administrative announcements (105). While tuned to the multicast, the mobile terminal continues to receive administrative announcements (107). As the broadcast fades out or is otherwise interrupted, the mobile terminal can retune to the same multicast broadcast in another cell (109), based on the cell connection information included in the previously received administrative announcements (111).
Abstract:
Systems and methods wherein a data entity is dispatched as a series of packets, with some of the packets being dispatched in an encrypted manner and others of the packets being dispatched in an unencrypted manner.
Abstract:
A hybrid method for a service provider (10) to transmit decryption information (e.g., algorithms, parameter, keys) to clients (12) in a secure manner and at low cost for use in decrypting broadcast services. The service provider (10) uses a bi-directional channel (14) (e.g., a GPRS channel) to receive service requests, authenticate clients and transmit currently valid decryption information (and, optionally, future decryption information) necessary to decrypt a broadcast service. The service provider (10) transmits the encrypted service on a unidirectional channel (16) (e.g., a DVB-T channel). The service provider (10) preferably also changes the encryption of the service with time, and, as it does, transmits updated decryption information to its clients (12) on the unidirectional channel (16). The updated decryption information is encrypted using the currently valid decryption information and may also include future decryption information and synchronization information.
Abstract:
Methods and systems are provided for filtering digital data formatted in packets. A filter module contains a plurality of filters and is coupled to a filter mapping module. The filter mapping module receives the identification of clusters of discrete segments of a packet and selects a group of fixed length filters to filter the clusters.
Abstract:
An object delivery session, such as a File Delivery over Unidirectional Transport (FLUTE) session, is joined and a description of a plurality of objects provided by the session are provided. The description indicates one or more groupings of the plurality of objects. An interesting object is determined from the plurality of objects. Based on the interesting object and the description of the plurality of objects, one or more of the plurality of objects are identified for downloading.
Abstract:
An apparatus, system method, and computer program product that combine the attributes of ALC and NORM for communicating data between devices on a network. A sending device uses multiple data rates on different channels to reliably send data packets and receivers use NACKs to request retransmission of missing or mangled data from the sending device or other receiving devices on the network. The sending device using an active ALC mechanism and the receiving devices use NACK and transmitting mechanisms for transmitting acknowledgements or data from the device. The sending and receiving devices can be located in the same or in different networks for communicating data packets during a data transmission session.
Abstract:
Approximating cell geometry in a cellular transmission systemUser equipment (UE1) for use in a cellular transmission system comprising a processor configuration (6) to provide data corresponding to first and second parameters (a, b) for dimensional extents of the cell, and to select one of a plurality of different approximate geometrical configurations for the cell in dependence on the relationship between the values of said parameters. The selected cell approximation is then compared with the UE's current location to determine if a cell handover is to be made. The cell approximation technique is described in relation to a DVB-T network.