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    • 6. 发明申请
    • METHOD AND APPARATUS FOR DATA EXCHANGE IN A DISTRIBUTED SYSTEM
    • 分布式系统中数据交换的方法与装置
    • WO2011048550A1
    • 2011-04-28
    • PCT/IB2010/054735
    • 2010-10-19
    • TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)APOSTOLOPOULOS, GeorgeDAUDT, Christian
    • APOSTOLOPOULOS, GeorgeDAUDT, Christian
    • G06F17/30
    • G06F17/30575
    • An apparatus tor exchanging data in a distributed system with constrained resources without symmetric metadata knowledge between senders and receivers. The sender includes an encoding module, which when encoding messages for a receiver, is operative to perform the following generate metadata descriptions for unique combinations of subset of fields of data structures, w here each metadata description defines for the receiver hem to decode data in the corresponding subset of fields of that data structure included in messages and does not include the data currently in those corresponding subset of field, generate a unique metadata description identification for each different metadata description, include metadata descriptions m the message'* as well as the corresponding metadata description identifications to the receiver that has not previously received those metadata descriptions, w hereby the messages ate encoded without per field overhead. The receiver includes a decoding module, which when decoding messages received from the sender, is operative to store metadata descriptions in a metadata description data structure as they are received from the sender, where each metadata description is associated with a metadata description identification, whereby the metadata description data structure is progressively- populated with metadata for data structures as messages are received from the sender that include metadata descriptions; and decode those messages received from the sender that do not include metadata descriptions based on the stored metadata descriptions that correspond with the metadata description identifications included in these messages, whereby these messages are decoded without those messages including metadata descriptions.
    • 一种在受限资源的分布式系统中交换数据的装置,在发送者和接收者之间没有对称的元数据知识。 发送方包括一个编码模块,当对接收机编码消息时,该模块可操作以对数据结构的子集的唯一组合执行以下生成元数据描述,这里每个元数据描述定义用于解码数据结构中的数据的接收机下摆 包含在消息中的该数据结构的相应子集的子集,并且不包括当前在那些对应的子集中的数据,为每个不同的元数据描述生成唯一的元数据描述标识,包括消息'*以及对应的元数据描述 元数据描述对先前没有接收到这些元数据描述的接收器的标识,因此消息在没有每场开销的情况下被编码。 接收机包括解码模块,当对从发送器接收到的消息进行解码时,在将元数据描述从发送方接收到的元数据描述数据结构中进行操作,其中每个元数据描述与元数据描述标识相关联,由此, 元数据描述数据结构随着从包含元数据描述的发送者接收到的消息而逐渐地填充数据结构的元数据; 并且基于与包括在这些消息中的元数据描述标识相对应的所存储的元数据描述来解码从发送者接收的不包括元数据描述的消息,由此这些消息被解码而不包括包括元数据描述的那些消息。