Based things transmission equipment network architecture NB-IoT
NB-IoT as a star networking industry has fast development, but also in daily use, NB-IoT indeed play an important role in this. With the official business NB-IoT, many things NB-IoT transmission equipment developed rapidly. As a low-power, wide coverage a networking industry standard, the industry's attention and discussion it is also increasingly enhanced.
NB-IoT things the transmission terminal has the following characteristics:
First, the wide coverage characteristics provide improved indoor coverage, at the same frequency band, using NB-IoT devices than the conventional network 20dB gain, equivalent to 100 times the ability to enhance the coverage area;
NB-IoT than GPRS and LTE base station to enhance the gain of 20dB, it is desirable to cover the local underground garages, basements and underground piping signal difficult to reach. According to the simulation test data in a separate deployment mode, NB-IoT coverage of up to 164dB, with the deployment of the protective tape and the simulation test has yet to be deployed.
Second connecting features includes the ability to support the mass, NB-IoT a sector can support thousands of connections, supports low latency sensitivity, low equipment cost, low-power devices and optimized network architecture; for example, limited by bandwidth, carriers to hundreds of families each router sensing is only open from 8 to 16 access ports, and a family is often how mobile phones, notebooks, tablet PCs, smart future in order to achieve a full house, networking equipment needs to become a thorny problem. The NB-IoT enough to easily meet future smart home networking needs in a large number of devices.
Third, the characteristics of low power consumption, especially for some devices and applications can not always replace the battery, such as placement in alpine wilderness in remote areas in the NB-IoT transmission equipment , they can not charge as smart phones a day, for several years of battery life is the most essential needs. NB-IoT focus small amount of data, small rate applications, thus NB-IoT devices can do very little power consumption, device battery life can be significantly improved from the past few months to several years.
Fourth, the characteristics of lower module costs, firms expect a series of single module does not exceed $ 500.
NB-IoT network architecture Detailed
NB-IoT-end system architecture as shown in FIG.
1) NB-IoT terminal: connection to a base station through an air interface.
2) eNodeB: access mainly responsible for air interface processing, management and other related cell functions, and connected via S1-lite interface IoT core network, forwarding the non-access stratum level data to the NE process. It should be noted, NB-IoT independent network can also be fused with the EUTRAN network (talking duplexing mode when talked about, NB can only support FDD Oh, so there must be convergence with FDD network)
. 3) core network IoT: assume the function of the terminal and non-access stratum interaction and forwards the data traffic to IoT IoT platform for processing. Similarly, where NB may be independent network, the core network may be shared with LTE.
. 4) internet IoT: aggregation IoT data obtained from a variety of access network, and forwarded to the appropriate service application is processed according to different types.
5) The application server: the final convergence point IoT data, and other data processing operations in accordance with customer demand.
Birth NB-IoT, gave birth on NB-IoT architecture: www.top-iot.com/index.php?m=content&c=index&a=lists&catid=57 development of equipment for the networking industry has brought new vitality.