Nokia Siemens Networks says that it has won a LTE rollout contract from Singapore’s StarHub, which will be refarming its 1800MHz GSM band to carry LTE services. The first phase of StarHub’s LTE network is expected to go live by the end of 2012, covering key business areas. As part of the contract, Nokia Siemens … Read more
New Zealand’s Prime Minister was warned in 2010 by the country’s security authorities that its broadband infrastructure could be compromised if network rollout contracts were awarded to China’s Huawei. The opposition politician, Clare Curran made the claim in Parliament earlier this week. Huawei has been banned from tendering for a nationwide broadband network in … Read more
The American Civil Liberties Union this weekend released the results of public records requests filed last August to hundreds of local police departments across the country, asking them about their policies, practices, and procedures for tracking cell phone records. As The New York Times reported on Sunday, the records show that the practice of … Read more
China’s Huawei and ZTE are expected to collectively ship 95-100 million smartphones in 2012, giving the two companies a combined global marketshare of 15%, according to Taiwan based DigiTimes. According to Gartner statistics, Huawei shipped 16 million smartphones in 2011, and ZTE scored 11 million. Citing Taiwan-based handset component suppliers, the publication reported that … Read more
Samsung Electronics has announced plans to invest US$7 billion in a semiconductor factory in China, that will focus on chips for mobile devices and music players, the company confirmed in a stock market filing. The investment will be staged over several years, with an initial US$2.3 billion going on a factory in Xi’an, the … Read more
The former CEO at South Africa’s MTN Group has denied claims that he authorised the payment of bribes to government officials to help secure a GSM operator license in Iran. The company is currently being sued by Turkcell after it claims that its license was confiscated and awarded to MTN after bribes were paid by … Read more
Satellite operator, Inmarsat has reported that a further payment due from USA based LTE network, LightSquared has been missed. The company reported a previous non-payment back in February. A scheduled payment of US$29.6 million that was due on 31 March 2012 has not been made. The payments related to a co-operation agreement by the two … Read more
What is Radio Retransmission in LTE? The radio retransmission mechanism is called Hybrid Automatic Request (H-ARQ). H-ARQ allows to retransmit fastly erroneous blocks between the eNodeB and the UE. It avoids long retransmission between 2 TCP layers. The H-ARQ process runs in the eNodeB and in the UE. The H-ARQ is based on ACK/NACK messages … Read more
How DL Channel works in LTE? The PDCCH, Physical Downlink Control Channel, allocates the DL and UL resources.There is one PDCCH per sub-frame. It helps the UE retrieve the transport blocks from the PDSCH: Allocated RB Modulation and Coding Scheme (MCS) Multi-antenna transmission PDCCH Shared between all UE of the cell Each TTI contains an … Read more
LTE : Data Transmission in DL In Long-Term Evolution (LTE), data transmission in the Downlink (DL) involves the transfer of user data from the Evolved NodeB (eNB) to the User Equipment (UE). The LTE DL is designed to provide high data rates, low latency, and efficient spectrum utilization. Here’s an overview of the key aspects … Read more