What is Otdoa in LTE?
What is Otdoa in LTE?
Observed Time Difference Of Arrival (OTDOA) is also a Release 9 positioning method, in which the UE measures the downlink Positioning Reference Signal (PRS) time difference of arrivals of several neighbor cells in comparison to a reference cell.
Is WCDMA 2G or 3G?
WCDMA is the 3G network that uses radiofrequency to transfer data in the form of calls, messages, or the internet which is also called UMTS. GSM represents 2G networks that were developed way before WCDMA and helps to transfer data through radio technology in the system.
What is LTE WCDMA GSM network?
LTE (Long Term Evolution) is a 4G communication standard designed to be 10x faster than standard 3G. GSM is a digital cellular technology used to transmit data and voice communication at a frequency range of 850MHz to 1900MHz. GSM technology uses a Time Division Multiple Access (TDMA) technique to transmit data.
What is WCDMA network type?
WCDMA (Wideband Code Division Multiple Access) UMTS standard for 3G digital mobile networks, using CDMA technology. It is the evolution path for GSM and EDGE to UMTS and offers increased voice capacity and theoretical peak data speeds of up to 2 Mbps.
What does WCDMA only mean?
If you select GSM/WCDMA (auto connect), your phone automatically switches between the two network modes provided that you’re within range of a 3G network. If you select GSM only, you can’t achieve high data speeds. If you select WCDMA only, your phone can only connect to 3G networks.
What is better Wcdma or LTE?
LTE provides much simpler and flat network architecture than that of the WCDMA. In general, WCDMA is considered as 3G technology while LTE is considered as 4G technology. LTE provides higher data rates than WCDMA by achieving higher spectral efficiency.
Which is better WCDMA or CDMA?
WCDMA is also better suited for accessing the internet and emails compared to the very slow CDMA. As indicated by the word wideband, WCDMA uses a much wider bandwidth than that of CDMA. WCDMA uses frequency bands that are 5Mhz wide compared to CDMA where each frequency band is only 1.25Mhz wide.
What is an eNB ID?
evolved NodeB IDentifier. Used to identify an eNodeB uniquely within a Public Land Mobile Network (PLMN). The eNB-ID can have either 20 bits or 28 bits. It is also comprised within the Global eNB-ID, which uniquely identi- fies an eNodeB globally.
What is e Smlc?
Acronym. Definition. E-SMLC. Enhanced Serving Mobile Location Center (telecommunications)
The transmission from eNBs (i.e. Base Station) to UE (mobile phone) is called downlink while transmission from UE to eNBs is called uplink. • In downlink OTDOA, UE measures the downlink signals and sent back the results to network. Based on the feedback from UE, network determines position of UE. Downlink OTDOA is specified in 3GPP Release-9.
How are OTDOA methods used in LTE applications?
There are three techniques used in LTE to determine the position of UE. These methods are used for emergency services as well as for commercial applications (maps, advertisements). We will see OTDOA method used for LBS (Location Based Services). There are two types of OTDOA viz. downlink OTDOA and uplink OTDOA (i.e. U-TDOA).
What are the different types of OTDOA transmissions?
There are two types of OTDOA viz. downlink OTDOA and uplink OTDOA (i.e. U-TDOA). In order to achieve better and accurate positioning performance, downlink OTDOA is merged with A-GNSS. The transmission from eNBs (i.e. Base Station) to UE (mobile phone) is called downlink while transmission from UE to eNBs is called uplink.
How does the hyperbolic multilateral algorithm work in OTDOA?
• OTDOA uses hyperbolic multilateral algorithm to determine time of arrival of downlink signals from multiple eNBs (includes 1 serving eNB and 2 or more neighbour eNBs). • TOA from neighbour eNBs are substracted from reference or serving eNB to form OTDOA’s.