Five disruptive technology directions for 5G
read more
Citations
Intelligent Reflecting Surface Aided MIMO Cognitive Radio Systems
Pilot Power Allocation Through User Grouping in Multi-Cell Massive MIMO Systems
Secure Short-Packet Communications for Mission-Critical IoT Applications
A Fine-Grained Analysis of Millimeter-Wave Device-to-Device Networks
Enriched $K$ -Tier HetNet Model to Enable the Analysis of User-Centric Small Cell Deployments
References
The Computer for the 21st Century
Millimeter Wave Mobile Communications for 5G Cellular: It Will Work!
Noncooperative Cellular Wireless with Unlimited Numbers of Base Station Antennas
An introduction to millimeter-wave mobile broadband systems
Seven ways that HetNets are a cellular paradigm shift
Related Papers (5)
Frequently Asked Questions (14)
Q2. What is the main goal of mwave cellular research?
MmWave cellular research will need to incorporate sensitivity to blockages and more complex channel models in the analysis, and also study the effects of enablers such as higher density infrastructure and relays.
Q3. What are the main challenges for D2D?
In particular, the authors envision D2D as an important enabler for applications requiring low latency,4 especially in future network deployments utilizing baseband centralization and radio virtualization.
Q4. What is the main idea behind the concept of a centralized baseband?
The deployment of base stations with vastly different transmit powers and coverage areas, for instance, calls for a decoupling of downlink and uplink in a way that allows the corresponding information to flow through different sets of nodes [5].
Q5. What is the main idea behind local caching?
The authors hence see local caching as an important alternative, at both the radio access network edge (e.g., at small cells) and mobile devices, also thanks to enablers such as mmWave and D2D.
Q6. What is the typical example of a vehicle-to-X connectivity?
A typical example is vehicle-to-X connectivity, whereby traffic safety can be improved through the timely delivery of critical messages (e.g., alert and control).
Q7. What is the way to use 5G?
several tens of gigahertz could become available for 5G, offering well over an order of magnitude increase over what is available at present.
Q8. What is the axiomatic role of a cell in a design postulate?
Under such a design postulate, a device obtains service by establishing a downlink and an uplink connection, carrying both control and data traffic, with the base station commanding the cell where the device is located.
Q9. What are the three examples of technologies that could be incorporated into smarter devices?
The authors focus on three different examples of technologies that could be incorporated into smarter devices: D2D, local caching, and advanced interference rejection.
Q10. How many connected devices do M2M services require?
Whereas current systems typically operate with, at most, a few hundred devices per base station, some M2M services might require over 104 connected devices.
Q11. What is the effect of the law of large numbers on the channel?
The favorable action of the law of large numbers smoothens out frequency dependencies in the channel and, altogether, huge gains in spectral efficiency can be attained (Fig. 4).
Q12. What is the importance of a reliable wireless link?
As these systems transition from wireline to wireless, it becomes necessary for the wireless link to be reliably operational virtually all the time.
Q13. What are the challenges in analyzing different transceiver strategies?
There are abundant research challenges in optimizing different transceiver strategies, analyzing their capacity, incorporating multiuser capabilities, and leveraging channel features such as sparsity.
Q14. How can a massive MIMO solution be implemented?
From an implementation perspective, massive MIMO can potentially be realized with modular low-cost low-power hardware with each antenna functioning semiautonomously, but a considerable development effort is still required to demonstrate the cost effectiveness of this solution.