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Reference alerts such as -particular reference signal (PSS), primary synchronization sign (PSS) / secondary synchronization sign (SSS), and ItagPro control channels comparable to physical downlink management channel (PDCCH) and physical broadcast channel (PBCH) are defined. This kind of service is named an extension carrier or iTagPro support a brand new carrier kind (NCT). An object of the current invention is to provide a channel measuring technique and ItagPro a gadget using the same in a wireless communication system. Another object of the present invention is to supply a technique for stopping a collision of a reference signal and an apparatus using the same. RF (radio freqeuncy) unit for transmitting and receiving a radio signal and a processor related to the RF unit. RRC layer of the primary cell. FIG. 2 reveals an example of a useful resource grid for one downlink slot. 3 shows a structure of a downlink subframe. FIG. 4 is an exemplary diagram illustrating monitoring of a physical downlink management channel (PDCCH). FIG. 5 shows an example in which a reference sign and a management channel are arranged in a downlink subframe of 3GPP LTE.

FIG. 7 shows an instance of a bodily resource block (PRB) pair. FIG. 10 reveals an instance of a subframe construction of a single provider system and a carrier aggregation system. FIG. 11 shows an instance of a subframe construction of a 3GPP LTE-A (superior) system that's cross-service scheduled by way of a service indicator field. FIG. Thirteen illustrates a channel measuring methodology in a wireless communication system in line with an embodiment of the present invention. FIG. 14 is a block diagram illustrating a wireless communication system through which an embodiment of the present invention is carried out. CDMA could also be implemented by a radio technology akin to common terrestrial radio access (UTRA) or CDMA2000. TDMA may be implemented with wireless technologies akin to world system for mobile communications (GSM) / common packet radio service (GPRS) / enhanced knowledge charges for iTagPro GSM evolution (EDGE). OFDMA may be carried out by wireless technologies comparable to Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.Sixteen (WiMAX), IEEE 802-20, evolved UTRA (E-UTRA), and ItagPro the like.

UTRA is part of a universal cellular telecommunications system (UMTS). Third generation partnership mission (3GPP) long term evolution (LTE) is a part of advanced UMTS (E-UMTS) utilizing developed-UMTS terrestrial radio entry (E-UTRA), which employs OFDMA in downlink and SC in uplink -FDMA is adopted. LTE-A (superior) is the evolution of 3GPP LTE. It may be referred to as different phrases equivalent to digital assistant, wireless modem, iTagPro website handheld machine. NodeB (eNB), a base transceiver system (BTS), an access point (AP), ItagPro and the like. LTE contains LTE and iTagPro / or ItagPro LTE-A. 1 shows a radio frame structure in 3GPP LTE. One subframe consists of two consecutive slots. TTI may be referred to as a scheduling unit for information transmission. One slot features a plurality of orthogonal frequency division multiplexing (OFDM) symbols within the time domain and a plurality of subcarriers in the frequency domain. OFDM symbol is used to symbolize one image period since 3GPP LTE makes use of OFDMA in downlink, and iTagPro smart tracker could also be known as a different name based on a multiple access scheme.

SC-FDMA when SC-FDMA is used as an uplink a number of access scheme, the OFDM image may be known as an SC-FDMA image. FIG. 1 is merely an example. Accordingly, the variety of subframes included in the radio frame, the variety of slots included within the subframe, or the number of OFDM symbols included in the slot may be variously modified. 3GPP LTE defines that one slot includes 7 OFDM symbols in a traditional cyclic prefix (CP), and one slot includes 6 OFDM symbols in an prolonged CP. FIG. 2 exhibits an instance of a resource grid for one downlink slot. OFDM symbols within the time domain and includes N RB RBs in the frequency domain. N RB of useful resource blocks included in the downlink slot depends on a downlink transmission bandwidth set in a cell. One RB includes a plurality of subcarriers in the frequency domain. Each aspect on the useful resource grid is called a resource ingredient (RE).