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Not Yet Satisfied: Further Enhanced ICIC


Not Yet Satisfied: Further Enhanced ICIC Not Yet Satisfied: Further Enhanced ICIC Further Enhanced ICIC in Release 11 aims at strengthening the eICIC concept and boosting the overall performance. Due to synchronization signal collision from macro and picocells, a UE may have difficulty to detect picocells. To assist cell detection, the serving cell provides the UE a list of picocells IDs so that the UE can skip cell ID detection and directly perform picocell reference signal measurements. In order to enhance reliability, additional options are defined such as sending SIB1 information in a RRC Reconfiguration message or applying interference [...]

Not Yet Satisfied: Further Enhanced ICIC 2019-03-11T12:04:09+00:00

Licensed Shared Access (LSA)


Licensed Shared Access (LSA) Licensed Shared Access (LSA) LSA simultaneously uses carrier aggregation with two different licensed frequency bands to increase throughput. One of these bands is the regular frequency band typically used by cellular operators such as 700 MHz, 850 MHz, 1800 MHz, and 1700/2100 MHz. Other frequency band is borrowed from an incumbent user. (For e.g., some satellite service providers may have a license to operate a given frequency band in a large area but may not be actively using the frequency band in a given geographic area. The cellular operator can now use the spectrum that [...]

Licensed Shared Access (LSA) 2019-03-09T18:15:36+00:00

WiFi Offload


Wi-Fi Offload Wi-Fi Offload Wi-Fi Offload involves the switching of the radio access technology from the cellular network to the Wi-Fi network. When the mobile device is not in Wi-Fi coverage, it is served by the macro-cellular network. As the mobile enters a Wi-Fi coverage area, the mobile device detects the presence of Wi-Fi. Based on the operator policies and user settings, the mobile device is moved from the cellular network to the Wi-Fi network. Because the cellular network does not carry data traffic for such mobile device, the network saves resources, which can be used to serve other [...]

WiFi Offload 2019-03-09T11:55:14+00:00

Cloud-RAN: Benefits Galore


Cloud-RAN: Benefits Galore Cloud-RAN: Benefits Galore The primary advantage of the C-RAN architecture is the overall reduction in CapEx and OpEx by consolidating and reducing the total amount of baseband equipment needed to handle a given number of cells; and reducing the equipment deployed at each cell site, which in turn reduces the power, air conditioning, real estate and other requirements at the site. Because the C-RAN centralizes the resource allocation and scheduling across multiple cells, it can achieve efficient resource utilization and minimizes interferences across cells, i.e., improved capacity and performance. Centralization in C-RAN can enhance the operation [...]

Cloud-RAN: Benefits Galore 2019-03-08T17:02:26+00:00

Fronthaul and Backhaul Challenges


Fronthaul and Backhaul Challenges Fronthaul and Backhaul Challenges C-RAN still has its challenges. The fronthaul requires a very high-bandwidth and low-delay optical transport between the BBUs and RRUs, capable of carrying at least 2 Gbps for each RRU on the link (for a single 20 MHz 2*2 MIMO LTE carrier). The delay requirements, in particular, also restrict the maximum distance the BBUs can be located from the RRUs, which limits the area that the C-RAN can serve. The overall cost and reliability of the fronthaul network must be carefully considered. To get updated with posts on new technologies like Artificial [...]

Fronthaul and Backhaul Challenges 2019-03-08T11:19:03+00:00

SON Function: Energy Savings


SON Function: Energy Savings SON Function: Energy Savings 3GPP Release 11 has defined the SON function for energy savings. This is to take advantage of the lack of activity in the network to conserve energy. The idea is shown in the diagram. In this scenario, an area covered by an E-UTRAN macrocell using another band. The macrocell does not use energy savings. At the peak traffic times, all three small cells are active, and there is no energy savings. At the Off-peak traffic time, two small cells are deactivated and are in an energy saving state. One small cell [...]

SON Function: Energy Savings 2019-03-08T11:56:52+00:00

A Brief Overview of FirstNet


A Brief Overview of FirstNet A Brief Overview of FirstNet First Responder Network Authority (FirstNet) is an organization responsible for Nationwide Public Safety Broadband Network (NPSBN). The NPSBN is based on a single, national network architecture and is intended to enable all public safety entities such as law enforcement personnel, firefighters and emergency medical service professionals to effectively communicate with one another across agencies and Jurisdictions. FirstNet is responsible to build and maintain core network and auxiliary networks for NPSBN. States can opt in or opt out of the radio network. The radio network of the opt-in states are [...]

A Brief Overview of FirstNet 2019-03-07T12:24:13+00:00

Why D2D Communication?


Why D2D Communication? Why D2D Communication? D2D communication can be carried out even in the absence of infrastructure. Hence, if a natural disaster destroys base stations base stations, Public safety professionals can communicate among themselves to provide help. Because the traffic does not travel through the radio network and the core network, latency is significantly reduced and can benefit applications such as collision avoidance for vehicle-to-vehicle communication. Furthermore, signaling and traffic processing load on the Enb is reduced significantly. Finally, once the D2D communication is supported, innovative services that we cannot imagine today could emerge as well. To get [...]

Why D2D Communication? 2019-03-12T15:59:39+00:00

ProSe : Special Treatment for Public Safety


ProSe : Special Treatment for Public Safety ProSe : Special Treatment for Public Safety One-to-many communication links for a group of subscribers is applicable only to public safety UEs. The direct communication does not involve any specific QoS except priority. The air interface provides the user plane for data transfer. The group shares secret key for data protection. Authorization for such communication is configured in UE  by ProSe Function. For example, ProSe configuration parameters include Group ID, IP multicast address, secret key and radio-related parameters. To get updated with posts on new technologies like. To get updated with posts on [...]

ProSe : Special Treatment for Public Safety 2019-03-07T13:23:29+00:00

Device-to-Device (D2D) Communication


Device-to-Device (D2D) Communication Device-to-Device (D2D) Communication Voice and data traffic between two mobile devices usually go from one mobile device to the radio network, from the radio network to the core network, and from the radio network to the other  mobile device. However, Device-to-Device (D2D) communication allows two mobile devices to directly exchange voice or data traffic without this traffic traveling through the network. D2D communication allows communication between the devices that are within a pre-defined proximity range such as 20-500 m. D2D communication is part of the overall framework of Proximity Services (ProSe) that includes several other aspects [...]

Device-to-Device (D2D) Communication 2019-03-05T19:58:46+00:00
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