5GDensificationSPP 2020.pdf

Parallel WIRELESS

TACKLING NETWORK DENSIFICATION CHALLENGES FOR 5G

5G NR USE CASES

Unlike previous generation it must support a wide variety of use cases

Too much diversity!

5G NR USE CASES

Unlike previous generation it must support a wide variety of use cases

Release 15 just focused on eMBB with forward compatibility in mind to support other uses cases in the future

5G DENSIFICATION CHALLENGES IN LEGACY NETWORKS

Monolithic and hierarchical architecture is not densification friendly

The legacy mobile networks were focused on single-tier deployment
Mainly macro layers with occasional co-channel underlays
5G pushes the limit for smaller cell deployment to the extreme
Combination of co-channel and different channel overlay/underlay in massive numbers
Increase in channel and bandwidth sizes creates a multi-tier network deployments, enhancing densification options

5G ANSWERS TO DENSIFICATION CHALLENGES

A new architectural approach

- Inherent split gNB

Already a distributed RAN architecture makes densification easier by centralizing (CU) control between different radios (DUs)
Centralized control and multiple coordinated Tx/RX approach
Wider and more distributed bands
Limit co-channel deployments without losing efficiency

5G NETWORK CAPACITY GROWTH

The main pillars for wireless capacity increase

Substantially More Capacity

THE TRENDS OF NETWORK CAPACITY GROWTH

Air Interface Technologies and available Spectrums are reaching their limits

Coordinated Multipoint Tx/Rx
Massive MIMO
New Modulation and Coding Schemes
Extended Licensed/Unlicensed Spectrum, mmWave
Licensed/Unlicensed Share Access

~20x 5x-10x !

Air Interface Technologies and available Spectrums are reaching their limits

• Integrated MultiRAT Operation ~25x 40x-50x

THE TRENDS OF NETWORK CAPACITY GROWTH

Device-to-Device

Reference: IEEE Vehicular Technology Magazine March 2014

NEXT 20 YEARS CAPACITY GROWTH

Balances shift

Air interface technology enhancements
Higher level modulations, advanced coding schemes, MIMO and all spatial and temporal multiplexing schemes almost reached their limits
New spectrum allocation
Not much available at low and mid bands
mmWave needs new network deployment paradigm
New network deployment methodologies
All the focus will be here for capacity increase in the near future

NEXT 20 YEARS CAPACITY GROWTH

LAST 20 YEARS MOBILE NETWORK JOURNEY

Increasing system capacity and user throughput

Air interface
Advanced modulations and coding schemes $ \rightarrow $ from GMSK (2G) to 256 QAM (LTE-A)
Spatial multiplexing $ \rightarrow $ MIMO and (e)CoMP

- Spectrum

From 25 MHz at 900 MHz band to more than 400 MHz at 40 different bands
Network deployment techniques
Aggressive frequency reuse and cell splitting

LAST 20 YEARS MOBILE NETWORK JOURNEY

THE NEXT 1000-FOLD CAPACITY INCREASE (SPECTRUM)

Old tricks do not work anymore

Governments have already done their best to allocate as much spectrum as they can - Mid-band (3.5 GHz-4.2 GHz) is crucial for 5G deployment

Reference: everything RF website

DENSIFICATION CHALLENGES

Simple in theory, more difficult practically

Densification concept for mobile network $ \rightarrow $ main pillar of cellular technology There is a practical limit to it

- Cost and ROI challenges

Legacy network solutions were not suitable for aggressive densification
Maintain QoS with legacy solutions for legacy services was not possible
Maintain acceptable call drop rate with 100 meter cell radius!

5G MAKES DENSIFICATION MORE PRACTICAL

5G architecture can scale for aggressive densification

Densification concept for mobile network $ \rightarrow $ main pillar of cellular technology
There is a practical limit to it
Cost and ROI challenges

- Cost and ROI challenges

Legacy network solutions were not suitable for aggressive densification

for legacy services was not possible

Maintain acceptable call drop rate with

5G MAKES DENSIFICATION MORE PRACTICAL 5G architecture can scale for aggressive densification • Densification concept for mobile

conjunction with overlay/underlay will

Distributes gNB (CU/DU) provides more central coordination
5G DU/RRUs can reduce the cost dramatically compared to legacy network deployments

• Distributes gNB (CU/DU) provides more

guarantee QoS for different services

DENSIFICATION AND MOBILITY

Smaller cells means more mobility related signaling and handoffs

Smaller cells increase number of HOs and related signaling
Horizontal intra frequency HOs due to mobility
Vertical inter frequency HOs due to mobility
Explosive growth of small cells and HetNet deployments require new approaches to mobility management

AGGRESSIVE DENSIFICATION FOR 5G

There is going to be a limit for "real estate" and infrastructure

There is a limit for available physical location, backhaul/fronthaul and power in prime locations
Cannot have 100 RRU per operator per square miles!
Traffic fluctuations impacting smaller cells more than macros
Smaller cells utilization can be minimum at certain times

5G RAN DENSIFICATION

Number of e/gNBs will grow dramatically

Increase in number of RAN nodes are in different scale compared to previous generations
Legacy approach to "own RAN" needs to change
Not practical deploying hundreds of e/gNBs per square mile
Neutral hosts can be a viable solution

Third party companies; e.g. tower companies, real estate owners, can fill the gap

PARALLEL WIRELESS APPROACH

OpenRAN Gateway

Fully virtualized, standard compliant, and cloud native ready
3GPP standard-compliant solution across different generations
Scalable solution

• Co-located of all different functions at the same HNG instance • Analytics, SON, and Orchestration

PARALLEL WIRELESS APPROACH OpenRAN Gateway !

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PARALLEL WIRELESS APPROACH TOWARD DENSIFICATION

OpenRAN Gateway

Parallel Wireless OpenRAN Controller is positioned perfectly to address 5G densification challenges
Utilizing our Analytics tool, it can coordinate the network accordingly and reduce interference

• Balancing the traffic across technologies

PARALLEL WIRELESS APPROACH TOWARD DENSIFICATION !