Electronics and Telecommunications Research Institute

Hae Yong Kim

Pyeong Soo Mah

Sang Cheol Kim

Jin Won Kim

Kyeong Tae Kim

Jeong-Woo Lee

Seon-Tae Kim

Gyu Sang Shin

Duk Kyun Woo

Chang Min Shin

Yu Seung Ma

Bum Ho Kim

Mi Sun Yu

Jin Ho Chang

There is provided a network join method including transmitting a long beacon message including transmission timing information of a first short beacon message to a child node network device, transmitting a first short beacon message including information regarding an interval in which it is possible to transmit a message, to the child node network device according to a transmission timing of the first short beacon message, receiving a slot allocation request message from the child node network device according to the interval in which it is possible to transmit a message, and checking whether the child node network device joins a network, and transmitting a slot allocation confirmation message to the child node network device.

Network join method and network device using the network join method

Provided is a method of dynamically reallocating a thread stack in a multi-threaded operating system, and more particularly, a method of dynamically allocating a thread stack of a multi-threaded operating system in an embedded system for wireless sensor nodes. The method includes the steps of: measuring sizes of data and non-data sections of a stack with respect to each thread; determining a new size of the non-data section of each stack based on the size of the data section of the stack measured with respect to each thread; and adjusting the size of the non-data section of each stack to the determined new size. According to the method, even without the source code analysis, an amount of memory spaces to be used can be reduced compared to that of a conventional static stack allocation method.

Dynamic stack allocating method in multi-threaded operating systems

Growing community of inventors

Daejeon, South Korea

Hae Yong Kim