Heterogeneous network - How do mobile operators exploit different network together to enhance customer satisfaction and reduce operating cost.

Yao-Yu Li, Po-Tzung Wang, Ping-Wei Hsieh

OUTLINE

Introduction of heterogeneous network

Global advancements

Adoption trend

Mobility Management Challenges

Market analysis

Discussion and conclusion

CELLULAR SYSTEM

• Data traffic demand in cellular networks is increasing at an exponential rate.

• Link efficiency is approaching its fundamental limits.

• Cell splitting gains are significantly reduced.

• Site acquisition costs can get prohibitively expensive.

CELL’S SCENARIO

HETEROGENEOUS NETWORK

• One of the solutions to meet the demand.

• Think small instead of big.

• A combination with different technologies.

• It aims at providing the better coverage and capacity, also the high qualities user experience for customer.

HETNET TOPOLOGY

ADOPTION TRENDS

• Heterogeneous network have three major components.

- Macro cell - Small cell

- Network intelligence

MACRO CELL

• Multicarrier - available spectrum and re-farming of spectrum - a cost-efficient way to increase both coverage and capacity.

• Sectorization

MACRO CELL• Tilt optimization - It is low cost and a powerful optimization technique - the most direct impact on coverage and interference parameters of the network.

SMALL CELLS

• Mobile operators are shifting their focus on small cells to increase capacity.

SMALL CELLS

• Wi-Fi is already deployed as a small cell technology globally - major mobile operators like AT&T and Chunghwa Telecom

- very low cost and resolving the problem of data traffic

SMALL CELLS

• Apart from the capacity increase, small cells could include :

- Better latency

- In-building coverage

- Better cell-edge coverage

NETWORK INTELLIGENCE

• Network intelligence allows mobile operators to manage Wi-Fi access points

• Intel recently conducted a trail that added intelligence to smart cell

NETWORK INTELLIGENCE

NETWORK INTELLIGENCE

• There are two extremely benefits in this way

- mobile operator can cut the amount of traffic through backhaul

- user experience can be largely improved

NETWORK INTELLIGENCE

• Caching content

- predicting caching

- proactive caching

NETWORK INTELLIGENCE

• Transrating video

- the codec is transrated in a dedicated node at the edge and then decoded right at the small cell.

- the codec is transrated in a dedicated node at the edge and then decoded right at smartphone.

MOBILITY MANAGEMENT CHALLENGES

• In order to realize the coverage and capacity benefits• Complexity environments• Rapid Varying user equipments• Challenges

• Handover optimization• intercell interference coordination(ICIC)• backhaul provisioning• Self-organization

INTERCELL INTERFERENCE COORDINATION (ICIC)

• Unplanned Deployment• operators do not control neither the number nor the location

• CSG(closed subscriber group) Access• cell access is restricted and nonsubscribers are thus not always connected to

the nearest BS

• Power Difference Between Nodes• minimize interference -> connect to strongest cell• Macro cell dead

• Range Expanded Users

SELF-ORGANIZATION

• Cells often deployed without operator supervision• Self-configuration

• Automatically downloaded software

• Self-healing• Failure recovery or execute compensation mechanisms

• Self-optimization• Monitoring the network status and optimize

MARKET ANALYSIS

2012 2013 2014 2015 2016 2017 20180

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HetNet Market in estimated CAGR 62.22%

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DISCUSSION & CONCLUSION

• Increase customer satisfaction and reduce operating cost.

• Macro cell can promote coverage and capacity.

• Adding intelligence to network.

DISCUSSION & CONCLUSION

• Amount of means of bolstering capacity

• Small cells of HetNet yield noticeable benefits for the network

• SON help improve network efficiency and effectiveness

THANKS FOR YOUR LISTENING.