Abstract:
The availability of very wide spectrum in millimeter wave bands combined with large antenna arrays and ultra-dense networks raises two basic questions: What is the true v...Show MoreMetadata
Abstract:
The availability of very wide spectrum in millimeter wave bands combined with large antenna arrays and ultra-dense networks raises two basic questions: What is the true value of overly abundant degrees of freedom and how can networks be designed to fully exploit them? This paper determines the capacity scaling of large cellular networks as a function of bandwidth, area, number of antennas, and base station density. It is found that the network capacity has a fundamental bandwidth scaling limit, beyond which the network becomes power-limited. An infrastructure multi-hop protocol achieves the optimal network capacity scaling for all network parameters. In contrast, current protocols that use only single-hop direct transmissions cannot achieve the capacity scaling in wideband regimes except in the special case when the density of base stations is taken to impractical extremes. This finding suggests that multi-hop communication will be important to fully realize the potential of next-generation cellular networks. Dedicated relays, if sufficiently dense, can also perform this task, relieving user nodes from the battery drain of cooperation. On the other hand, more sophisticated strategies such as hierarchical cooperation, that are essential for achieving capacity scaling in ad hoc networks, are unnecessary in the cellular context.
Published in: IEEE Transactions on Wireless Communications ( Volume: 17, Issue: 1, January 2018)
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- IEEE Keywords
- Index Terms
- Cellular Networks ,
- Capacity Scale ,
- Density Of Infrastructure ,
- Impact Of Bandwidth ,
- Degrees Of Freedom ,
- Large Networks ,
- Base Station ,
- Antenna Array ,
- Direct Transmission ,
- Network Capacity ,
- Ad Hoc Networks ,
- Large Antenna Arrays ,
- Multi-hop Communication ,
- User Nodes ,
- Upper Bound ,
- Limited Power ,
- Cellular Systems ,
- Pair Of Nodes ,
- Additive Gaussian Noise ,
- Relay Nodes ,
- Massive Multiple-input Multiple-output ,
- Channel Model ,
- Base Station Antennas ,
- Calcium Silicate ,
- Broadcast Channel ,
- Scaling Exponent ,
- Received Power ,
- Rest Of The Network ,
- Cell Nodes
- Author Keywords
Keywords assist with retrieval of results and provide a means to discovering other relevant content. Learn more.
- IEEE Keywords
- Index Terms
- Cellular Networks ,
- Capacity Scale ,
- Density Of Infrastructure ,
- Impact Of Bandwidth ,
- Degrees Of Freedom ,
- Large Networks ,
- Base Station ,
- Antenna Array ,
- Direct Transmission ,
- Network Capacity ,
- Ad Hoc Networks ,
- Large Antenna Arrays ,
- Multi-hop Communication ,
- User Nodes ,
- Upper Bound ,
- Limited Power ,
- Cellular Systems ,
- Pair Of Nodes ,
- Additive Gaussian Noise ,
- Relay Nodes ,
- Massive Multiple-input Multiple-output ,
- Channel Model ,
- Base Station Antennas ,
- Calcium Silicate ,
- Broadcast Channel ,
- Scaling Exponent ,
- Received Power ,
- Rest Of The Network ,
- Cell Nodes
- Author Keywords