What Will 5G Be
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Citations
A Survey on Mobile Edge Computing: The Communication Perspective
On the capacity of a cellular CDMA system
Next Generation 5G Wireless Networks: A Comprehensive Survey
Non-orthogonal multiple access for 5G: solutions, challenges, opportunities, and future research trends
A Survey on Mobile Edge Computing: The Communication Perspective
References
A mathematical theory of communication
Cooperative diversity in wireless networks: Efficient protocols and outage behavior
Capacity of Multi‐antenna Gaussian Channels
On Limits of Wireless Communications in a Fading Environment when UsingMultiple Antennas
Millimeter Wave Mobile Communications for 5G Cellular: It Will Work!
Related Papers (5)
Frequently Asked Questions (14)
Q2. What is the case scenario for a cellular network?
In an interference-limited network with full buffers, the signal-to-interference-plus-noise ratio (SINR) is essentially equal to the SIR and, because the SIR distribution remains approximately constant as the network densifies, the best case scenario is ρ ≈
Q3. What is the main reason for the need for massive MIMO?
As networks become dense and more traffic is offloaded to small cells, the number of active users per cell will diminish and the need for massive MIMO may decrease.
Q4. What is the important feature of cellular networks relative to WiFi?
Although a hefty share of data is served to stationary indoor users, the support of mobility and alwayson connectivity is arguably the single most important feature of cellular networks relative to WiFi.
Q5. How many BSs can be as small as two hundred meters?
In Japan, for instance, the spacing between BSs can be as small as two hundred meters, giving a coverage area well under a tenth of a square km.
Q6. What is the effect of unlicensed spectrum on the overall social welfare of the users?
while unlicensed spectrum generally lowers barriers to entry and increases competition, the opposite could occur and in some circumstances a single monopoly operator could emerge [171] within the unlicensed bands.
Q7. What are the main issues still open in terms of scalability, migration from current structures?
From a wireless core network point of view, NFV and SDN should be viewed as tools for provisioning the next generation of core networks with many issues still open in terms of scalability, migration from current structures, management and automation, and security.
Q8. Why is the access network the largest share of the energy?
Due to the rapidly increasing network density (cf. Sect. II-A), the access network consumes the largest share of the energy [142].
Q9. How many exabytes of data will be handled by wireless networks by 2020?
In just a decade, the amount of IP data handled by wireless networks will have increased by well over a factor of 100: from under 3 exabytes in 2010 to over 190 exabytes by 2018, on pace to exceed 500 exabytes by 2020.
Q10. What is the pairing for MIMO?
An excellent pairing for MIMO, since OFDM allows forthe spatial interference from multiantenna transmission to be dealt with at a subcarrier level, without the added complication of intersymbol interference.
Q11. What is the way to allocate spectrum?
4) Market-Based Approaches to Spectrum Allocation: Given the advantages of exclusive licenses for ensuring quality of service, it is likely that most beachfront spectrum will continue to be allocated that way.
Q12. What are the two regulatory frameworks that allow spectrum sharing?
Authorized Shared Access [166] and Licensed Shared Access [167] are regulatory frameworks that allow spectrum sharing by a limited number of parties each having a license under carefully specified conditions.
Q13. Why is it difficult to model and analyze the effect of mobility on network performance?
Because modeling and analyzing the effect of mobility on network performance is difficult, the authors expect to see somewhat ad hoc solutions such as in LTE Rel-11 [51] where user-specific virtual cells are defined to distinguish the physical cell from a broader area where the user can roam without the need for handoff, communicating with any BS or subset of BSs in that area.
Q14. What is the main argument for allowing some of the parameters to be tunable?
The authors conclude with their own opinion that OFDM could be well adapted to different 5G requirements by allowing some of its parameters to be tunable, rather than designed for essentially the worst-case multipath delay spread.