Abstract:
PURPOSE: A grouping calculating method using an inverse pointer in an object-related database managing system and a totalizing function obtaining method using a group table created therein are provided to enhance a grouping calculating speed of an object-related database management system by using an inverse pointer which is a special storing structure being provided from an object-related database. CONSTITUTION: If attributes defined in a class C are displayed in a Group By of a query as more than two attributes continuously for creating a group table(801), an overlap table having 'n' number group key is crested(802). Otherwise a single table having one group key is created(803). Objects(O) satisfying a condition of a conditional clause(Where) are read in the class C one by one(804). If values of attributes displayed in a group clause of a query in the object O satisfying the condition are Vi, it is checked whether the Vi is already existing in a predetermined record of the group table or new value(805). If the Vi is a value displayed in a specific record of the group table, the record is called by a "record-j"(806). If the Vi is new value, the created record is called by a "record-j"(807). An inverse pointer being included in the object O is stored in a pointer-list of the "record-j" of the group table(808). The above processes are repeated with respect to all objects of the class C(809).
Abstract:
PURPOSE: A method for controlling a cursor in a data set based on a navigation is provided to access to a data set by using an object identifier with respect to an object instead of creating an additional storing structure with respect to multiple data set. CONSTITUTION: A basic table is set by analyzing a user's query, and a cursor is constructed by extracting an entry of the basic table and information of an object table(400). An object identifier from the object table is extracted, and the cursor is initialized using the object identifier(402). The user's query is searched in a data set using the constructed and initialized cursor(404). Therefore, unnecessary storing space for the data set obtained by a result of the query in a main internal memory is decreased by providing the cursor providing a sequence access in the data set using the object identifier with respect to multi data set in the main internal memory.
Abstract:
본 발명은 사물의 속성에 기초한 프로그램을 이용하는 사물 간 통신 방법에 관한 것이다. 본 발명에 따른 사물 간 통신 방법은 제1 정보단말이 생성한 제1 단말정보를 서버로 전송하는 단계, 제2 정보단말이 생성한 제2 단말정보를 상기 서버로 전송하는 단계, 및 상기 제2 정보단말이 상기 서버로부터 상기 제1 단말정보 및 상기 제2 단말정보 중 적어도 하나를 기초로 선정된 특정 프로그램을 수신하는 단계를 포함한다.
Abstract:
The present invention relates to a integrated framework for supporting object representation of a representation state transfer (REST) style, control, communication between applied objects, services establishment, and the establishment of a collaboration system and, more specifically, to a method for providing various specifications language processing of the system, a method of binding for providing dynamic binding and unbinding during the operation of the system, as well as the configurations of resources, a method, and representation for supporting the establishment and reconstruction of the system based on the REST, and an operation method thereof.
Abstract:
PURPOSE: A routing device and method are provided to shorten a transmission path of sensing data between field networks and to reduce packet traffic load of relay network. CONSTITUTION: A routing table(314) stores a next address and an output interface corresponding to an input interface and an extended destination address. If a destination address of sensing data received from a sensor node of a field network is MAC(Medium Access Control) address of abbreviated type, the routing controller(312) changes the MAC address of abbreviated type into the MAC address of extended type. The routing control transmits sensing data.
Abstract:
PURPOSE: Data broadcasting performed in a sensor node and a feedback method thereof are provided to prevent power consumption or collision of feedback data, and to extend a lifespan of network by effectively reducing the number of unnecessary feedback. CONSTITUTION: An error is made in receiving of data broadcasted to neighboring nodes of a receiving node. An acknowledgement response frame is transmitted to transmitting nodes within a constant time. The broadcasted data is normally received. After the predetermined time, an affirmation receiving response frame is transmitted to the transmitting node.