Electronic enthusiasts eight o'clock: At the recent Wireless CommunicaTIons and Networking Conference (WCNC'17) held in the United States, the debate on various wireless technologies covered mobile broadband to the Internet of Things (IoT) The application also reveals the diversity of these emerging areas and the level of competition.
There are several news highlights in this session:
A startup company believes that the first phase of the 5G cellular communication standard is "short-sighted";
A telecommunications operator complained about the misuse of early cellular IoT networks;
Various vendors have heated debates about the role of 5G in the Internet of Things;
Wi-Fi supporters say unlicensed LTE faces tough battles;
Six startups showcase competitive wireless data networks.
Anton Monk, vice president of startup cohere Technologies, said that the first phase of the 5G cellular communication specification did not consider various new technology options, such as the new air interface architecture proposed by the company: "Some large suppliers want Let something be done quickly, and put a 5G name on it - we will see how these things are widely deployed;" He recently attended the 3GPP standards conference in Dubrovnik, Croatia.
Monk describes the first phase of the 5G specification: "LTE with massive MIMO and beamforming - except for the use of Huawei's polar codes in the control channel and the use of low-density parity check codes (LDPC) everywhere. There are no other real new technologies."
Looking ahead, 3GPP will conduct research on some high-performance usage scenarios, which is expected to contribute to the second phase of the 5G standard, including enhanced vehicle communications, as well as from ZTE and other Chinese vendors targeting power domains ( Power domain) Non-orthogonal multi-tasking access (NOMA) coding to improve spectral efficiency.
Early users flooded into some cellular IoT networksIn the cellular IoT network, according to a Verizon executive, some users poured into the early deployment of LTE Cat-M1; he was on a LTE-based IoT network blueprint and discussed 5G The above comments were made after the symposium on the role played by the IoT field.
The Cat-M1 standard supports VoLTE (Voice-over-LTE), which enables automatic emergency telephone notification in certain application scenarios. Some users now have links between, for example, a smart watch and a child wrist-worn tracking device. There is a need for audio streaming. Therefore, the Verizon director said that although some initial Cat-M1 networks have not been optimized, they still operate less than half the efficiency of the average LTE network; operators are asking suppliers to provide alternatives that can throttle the user network.
Eric Wang, a senior commissioner at Ericsson Research, said: "First of all, we don't think VoLTE (IoT applications) is important at all, but now everyone is asking this feature."
3GPP defines a blueprint for the development of cellular IoT by 2019 (Source: Qualcomm)
The above LTE cellular IoT network development blueprint shows several new features that will appear in the next two years; however, Qualcomm chief engineer Hau Xu said that the cost of those new features will not fall below the current high-end Cat- M1 is lower than the low-end NB-IoT specification technology.
The so-called Release 14 version specification, which will be released next year, will mainly add support for location data and multicast (mulTIcasTIng) to make over-the-air upgrades more efficient. Xu pointed out: "We have just begun to define Release 15," but the feature set is fixed; beyond that: "People are working on a larger change (Release 16~17) proposal... content includes NOMA or mesh network ( Mesh networking)."
In the 5G field, suppliers are currently disagreeing. Some people have called for a gradual reinforcement of the current parallel high/low-level 4G standards. Others want a single specification that is more pure and revolutionary. In general, 5G IoT networks may attempt to achieve node price of $1, 10-year battery life, and the goal of supporting millions of devices per cellular base station.
Ericsson's Wang pointed out that 5G may bring the cellular IoT to the license-free and millimeter-wave bands, thus creating a new use situation.
Today's cellular IoT upgrade will not change the current cost dynamics (Source: Nokia)
As for LTE, which is ready to be used in the license-free band, it seems that it is not ready to become a consumer service...
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