Air Interface Characteristics

Air Interface Characteristics

Air Interface Characteristics

• OFDMA (DL) and SC-FDMA ( UL)
• TDD/FDD/H-FDD
• Several Frequency Bands (Ex: 700 to 2500 MHz)
• Two Radio Frame Structures (Type 1 for FDD,Type 2 TDD)
• Numerous Multiple Antenna Techniques
• Scalable Bandwidth (1 4 3 5 10 15 & 20MHz)

DNA and Ericsson boost customer experience in Finland

Finnish operator DNA has chosen Ericsson (NASDAQ: ERIC) to provide a Customer Experience Management (CEM) solution based on User Data Consolidation (UDC) for real-time data consolidation and exposure. This solution will enable DNA to resolve customer-care issues in a faster and more efficient way than was previously possible. As a result, the end-user experience will be greatly improved.

The DNA Customer Care center serves more than 3 million users - a high proportion of who are mobile broadband users who demand high standards of service quality and user experience. With the new solution, DNA benefits from reduced time per call and escalations to second-line support, which significantly enhances customer satisfaction and loyalty and reduces churn and opex.

"Delivering high-quality customer care is at the heart of our business," says Tommy Olenius, Vice President, Technology, DNA. "The implementation of this solution gives us the optimal tools to monitor the customer experience and to proactively make adjustments as issues arise."

Source: Ericsson News Room

How a UE knows which PDCCH part to listen in LTE?

UE knows which PDCCH part to listen from the RRC configuration (for dedicated resources). For the initial connection and broadcasted info the UE uses predefined PDCCH configuration and the one obtained from System Information.

Value of RSRP, RSRQ, RSSI and SINR to get Good Data Rate

RSRP, RSRQ ,RSSI are the measurements that the UE takes for cell reselection or handover puroposes. It is not used for the purposes of the transmission settings, but to take the decision (by the UE – in case of cell reselection; or eNB – in case of handover) to move the UE to other cell. In the case of handover, the UE sends the measurement results according to the eNB commands (e.g. periodically or triggered by event). The power of the eNB is constant and does not depend on the RSRP / RSRQ / RSSI measurements.

The measurements and feedback that relate to the transmission settings are known as CQI (channel quality indicator). Depending on that value (CQI index), the eNB takes the decision to assign a particular MCS (modulation and coding scheme) for a particular UE. The higher the CQI (ranging from 0 up to 15) the higher the modulation and coding scheme and the higher the throughput. However it is up to the implemented receiver algorithms in the UE, at which SNIR the good throughput can be achieved (the algorithms are vendor dependent so the “good SNIR” may vary for various UEs).

T-Mobile to Start Release-10 LTE Trials This Summer

Since announcing its’ $4 billion 4G network evolution plan, T-Mobile has made substantial progress, operator has reported. T-Mobile LTE trials are underway and this summer it plans to begin using Release-10 equipment in these trials.

Operator has already selected Ericsson and Nokia Siemens Networks (NSN) to support It’s 4G network evolution plan, including network modernization and LTE deployment in 2013. Operator plans to modernize 37,000 cell sites and a move to the latest, LTE release 10 capable equipment.

Du Launches LTE Service in UAE

UAE telecom operator Du has stepped up mobile broadband experience with the launch of its LTE network. Operator expects to provide internet service at speeds of up to 100 Mbps with the new LTE Internet Key. The cost for du’s LTE Internet Key is a one-off payment of AED799 for the device, plus AED55 for a monthly data line. A special LTE 25GB bundle is available for only AED500.

“Our LTE network is taking online connectivity to the next level. Customers with an LTE Internet Key can experience some of the fastest internet connection speeds in the world,” said Farid Faraidooni, Chief Commercial Officer, du.

HSPA+ in the HSPA Roadmap

HSDPA

HSDPA aim to reach high data rates (14.4 Mbit/s) in the DL first. These data rate should be compatible with the DSL standards at that time. In R5 high data rate in UL was not as important as in DL. Key features have been fast scheduling and the introduction of 16-QAM.

HSPA

In R6 HSUPA was added to reach data rates of more than 5 Mbit/s in UL. With the possibility to exchange both signaling and data in both UL and DL on HSPA the first step towards all PS services has been made for limited QoS.

LTE

LTE R8 is the standard of the 4th generation and offers extremely high performance: Data rates in the order of hundreds of Mbit/s, an architecture designed for AIPN and all PS services (no CS possible any more) from the  start, and most low latency times for the user plane and the control plane. MIMO and higher order modulation schemes (64-QAM) are extensively used for LTE. With LTE R9 the data rates will be further extended.

HSPA+

HSPA+ has been planed while the work on LTE was already ongoing and thus has to follow the benchmark set by LTE. R7 not only doubles the data rates of HSPA but also introduced feature like CPC allowing the UE always in all RRC states (also CELL_FACH and XXX_PCH) to fully rely on HSDPA services R7 HSPA+ introduces MIMO and 64-QAM as in LTE. In R8 64-QAM will be combined with MIMO in order to enhance the DL data rate by 50%. As well DL interference cancellation is introduced in R8.