Abstract:
본발명은 D 2D 통신시스템및 그것을이용한위치기반주파수자원할당방법에관한것이다. D 2D 통신시스템의위치기반주파수자원할당방법에있어서, 기지국은셀 내의복수의단말기의위치정보와전송률정보를획득하고후보단말기를검색하는단계, 상기후보단말기위치정보에따라복수의셀룰러그룹과복수의 D 2D 그룹으로나누어그룹화하는단계, 그룹별위치를기초로상기셀룰러그룹과상기 D 2D 그룹을배합하는단계, 상기어울린셀룰러그룹과 D 2D 그룹에포함되는복수의상기후보단말기들에대하여전송률정보를이용하여각각의그룹별로배열하는단계그리고상기셀룰러그룹의후보단말기와상기 D 2D 그룹의후보단말기위배열순서를이용하여주파수자원을공유하도록설정하는단계를포함한다. 이와같이본 발명에따르면위치정보와전송률정보를이용하여 D 2D 단말에자원을할당함으로써, 다운링크통신에서 D 2D(--) 폐어의단말기가동일주파수를공유하고있는셀룰러양식의단말기에주는간섭을감소시킬수 있으며, 시스템의성능을향상시킬수 있다.
Abstract:
The present invention relates to a wireless location determination method using a fingerprinting technique and a device thereof. According to the present invention, the wireless location determination method using the fingerprinting technique which performs the location determination using a plurality of access points and a plurality of sample points arranged at regular intervals comprises a step of detecting first to third sample points which are adjacent to an arbitrary node among the plurality of sample points through the fingerprinting technique; a step of calculating a correction coordinate using an RSS value between the arbitrary node and the first sample point, an RSS value between the arbitrary node and the second sample point, an RSS value between the first and second sample points, an RSS value between the first and third sample points, and a distance between the sample points; and a step of estimating the position of the arbitrary node by reflecting the correction coordinate on a coordinate of the first sample point. According to the present invention, the position of the arbitrary node can be accurately estimated using the fingerprinting technique based on RSS and a frequency can be effectively allocated based on an area of the estimated position information. Also, the directivity of the arbitrary node can be estimated using a location determination technique which uses an RSS vector value ratio of the sample points. Therefore, a computation amount can be reduced and high-precision position information can be provided.
Abstract:
The present invention provides a wireless positioning method using a wireless sensor network and an apparatus thereof. The wireless positioning method of estimating the position of a random node which is a positioning target by using a plurality of anchor nodes arranged in a constant interval, includes the steps of: setting a plurality of test nodes in a uniform interval on a space formed by partial anchor nodes among a plurality of anchor nodes; acquiring position information and the number of anchor nodes existing within a constant distance from the random node; detecting at least one test node having equal number and position information of the acquired anchor node; and estimating the position of the random node by calculating an average coordinate value of the detected test node. According to the wireless positioning method using the wireless sensor network and the apparatus thereof, average position error of the whole area can be reduced by being able to estimate the position of the random node around the edge and the corner of the wireless sensor network accurately, differently from the case using the conventional WCL algorithm. [Reference numerals] (AA) Start; (BB) End; (S510) Set a plurality test nodes in a constant interval on a space formed by partial anchor nodes among a plurality of anchor nodes; (S520) Acquire position information and the number of anchor nodes existing within a constant distance from a random node; (S530) Detect at least one test node having equal number and position information of acquired anchor node; (S540) Estimate position of the random node by calculating the average coordinate value of the detected test node
Abstract:
PURPOSE: A store management server, a wireless terminal and a method of managing a cart using the same are provided to find a location of a cart by using a location measuring device and mange the cart by using the found location, thereby performing effective cart management. CONSTITUTION: A store management service receives position information from a wireless position determination device generating position information about a cart(S201). The store management server generates location information about the cart by using the position information(S203). The store management server transmits the location information to a wireless terminal(S205). The store management server determines whether the cart is located in a preset area by using the location information(S207). The store management server outputs a result according to the determination(S209).