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Wireless

Mobility Lab Webinar #3 Recap: Inter-Operator Mobility with CBRS

Omkar Dharmadhikari
Wireless Architect

Apr 18, 2019

Today we hosted our third webinar in the Mobility Lab Webinar series, “Inter-Operator Mobility with CBRS.” In case you missed the webinar, you can read about it in this blog or scroll down to see the recorded webinar and Q&A below.

Background

Multiple service operators (MSOs) may be motivated to provide mobile services using the new 3.5 GHz spectrum introduced with Citizens Broadband Radio Service (CBRS). However, because CBRS operates low-power small cells to provide localized coverage in high-traffic environments, MSOs may rely on mobile virtual network operator (MVNO) agreements to provide mobile service outside the CBRS coverage area. In this scenario, MSOs will be motivated to:

  • deliver a seamless transition,
  • minimize the transition time between the home CBRS network and the visitor MVNO network, and
  • maximize device attachment to the home CBRS network.

For inter-operator roaming, mobile operators use one of the two 3GPP roaming standards—Home Routing (HR) or Local Break Out (LBO)—to support the transition between a home network and roaming partner visitor networks. The international or domestic roaming agreements between home and visitor operator networks require the two networks to share roaming interfaces, as dictated by the 3GPP-defined roaming models. Because mobile operators are motivated to keep their subscribers on their network as long as possible to minimize LTE offload, they have little incentive to provide open access and connection to MVNO partners. Thus, the CBRS operator and host MVNO operators may have different and opposing motivations.

Our Webinar: Inter-Operator Mobility with CBRS

The “Inter-Operator Mobility with CBRS” webinar provides key findings that may assist MSOs in evaluating the implementation of the two roaming models for CBRS use cases with regards to:

  • inter-operator mobility using network-based triggers for connected and idle modes,
  • sharing of roaming interfaces,
  • Public Land Mobile Network (PLMN) configurations, and
  • higher-priority network selection timer.

The webinar also discusses the alternative solutions to network-based transition, such as:

  • device transition controlled with an external server and
  • enhancing dual SIM functionality.

You can view the webinar, webinar Q&A and technical brief below:

If you have any questions, please feel free to reach out to Omkar Dharmadhikari. Stay tuned for information about upcoming webinars by subscribing to our blog.


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Wireless

Mobility Lab Webinar #3: Inter-Operator Mobility with CBRS

Omkar Dharmadhikari
Wireless Architect

Mar 21, 2019

The emergence of spectrum sharing with Citizen Broadband Radio Service (CBRS) has unlocked opportunities for new entrants including traditional multiple service operators (MSOs) to provide mobile service. CBRS networks will use low power small cells which inherently provides short distance coverage and thus target deployment in high traffic areas. Operators will likely have to rely on macro-cell network coverage to compensate for mobile service outside CBRS network coverage. Mobile Virtual Network Operator (MVNO) agreements are a common solution to support this strategy. Mobility and roaming between MSO-owned CBRS network and mobile network operator (MNO) owned licensed LTE network could potentially become a hurdle for MSOs with the need to share roaming interfaces and the need to have mobility parameters configured on both networks.

Inter-Operator-Mobility

Inter-operator mobility with CBRS can be achieved with two 3GPP standardized roaming models for inter-operator mobility, each posing different challenges, benefits and tradeoffs to MSOs:

Home Routed (HR)

HR is ideal for MSOs who have a strong relationship with an MNO where sharing multiple interfaces and configuring mobility parameters is not an issue. HR benefits MSOs by enabling seamless connected mode mobility for subscribers while transitioning between the two operators but incurs high latency with user traffic being routed back to the home network.

Local Break Out (LBO)

LBO is ideal for MSOs who desire the least dependency on the MNO and plan to offer only data services with CBRS. Voice service offering with LBO implementation can degrade user experience because service disruption is expected during network transition with no S10 interface sharing. LBO, however, offers efficient routing in terms on bandwidth and latency as the user traffic is serviced by the visitor network.

CableLabs conducted testing to analyze requirements for the two 3GPP based roaming models with regards to network infrastructure, roaming interfaces, mobility configuration and mobility triggers. The testing documents key findings and observations that could assist MSOs to evaluate the benefits and challenges offered by the two roaming models.

Register for our Webinar

CableLabs is hosting another webinar as part of the “Mobility Lab Webinar Series” on “Inter-Operator Mobility with CBRS”, scheduled for April 16th, 2019.

The webinar provides:

    • An understanding of 3GPP based network implementations for roaming used for inter-operator mobility along with their benefits and tradeoffs
    • An overview of inter-operator mobility testing at CableLabs
    • A brief description of alternate implementations that could overcome challenges faced with 3GPP based network Implementations for roaming
    • A lab demonstration of connected mode handover using Home Routed (HR) model between MSO owned CBRS network and MNO owned licensed LTE network

Register for our Webinar

In case you missed our previous webinars, you can find them below:

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Wireless

Mobility Lab Webinar Recap: Over-the-Top (OTT) Aggregation

Omkar Dharmadhikari
Wireless Architect

Feb 14, 2019

This week, we hosted our second installment of the Mobility Lab Webinar series on “Over-the-Top (OTT) Aggregation.” If you were unable to attend the webinar, you can read about it in this blog or scroll down to see the recorded webinar and Q&A below.

Background

Wireless operators have always been driven to meet increasing user demand by achieving higher data rates and improving quality of service. To fulfill these needs, wireless operators have used various types of carrier aggregation, including several commonly used industry-standard solutions:

  • Traditional multi-carrier aggregation
  • Aggregating carriers in either licensed or unlicensed spectrum, using a single technology like LTE
  • Aggregating carriers by using both LTE in licensed spectrum and Wi-Fi in unlicensed spectrum

Each aggregation solution offers benefits such as higher date rates, improved QoS, more efficient spectrum utilization and enhanced user experience. But these benefits need to be weighed against certain tradeoffs in terms of capital investments, deployment complexities, spectrum and network infrastructure ownership. This may result in barriers for Multiple Service Operators (MSOs) with no cellular infrastructure.

Our Webinar: Over-the-Top (OTT) Aggregation

OTT aggregation is an alternate solution to industry-standard aggregation solutions. OTT aggregation solutions leverage existing cellular and Wi-Fi infrastructures without requiring any significant changes on the network and end-user devices. Thus, OTT aggregation solutions offer an economical approach for an MSO to provide high data rates and improved user experience.

The webinar provides the following:

  • An understanding of why aggregation is important
  • An overview of traditional aggregation solutions
  • A detailed description of OTT aggregation solutions compared with industry-standard aggregation solutions
  • An overview of the testing conducted by CableLabs to validate the benefits of aggregation solution on end-user throughput and quality of experience (QoE)

To learn more about this topic, please use the links below:

Stay tuned for information about upcoming webinars. If you have any questions, please feel free to reach out to Wireless Architect Omkar Dharmadhikari.


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Wireless

CableLabs Presents: Mobility Lab Webinar Series

Omkar Dharmadhikari
Wireless Architect

Oct 17, 2018

The CableLabs wireless R&D group has a charter to investigate new and emerging wireless technologies that will benefit our cable operator members, half of which also own mobile networks. As cable and mobile networks continue to converge, we've built a fully functional mobility lab. The aim of the mobility lab is to conduct validation, proof of concept, standards development and new technology assessments to support Multiple System Operator (MSO) use cases.

Mobility Lab Infrastructure

The mobility lab includes a variety of:

  • Radio Access Network (RAN) equipment including Citizens Broadband Radio Service Devices (CBSDs) and small cells operating in licensed bands with FCC approved experimental licenses
  • Multiple cellular virtualized and cloud core network solutions
  • Data Over Cable Service Interface Specification (DOCSIS) backhauled small cells

CableLabs and Kyrio offer a diverse lab environment with an anechoic chamber, shield room, RF tents, UE simulators and a 5,000 sq. ft. test house for testing real-world scenarios.

Mobility Lab Projects

The mobility lab hosts a wide variety of projects spanning from:

  • Low latency backhaul
  • Inter-EPC and PLMN handover
  • Wi-Fi calling
  • 5G converged core
  • LAA and Wi-Fi co-existence
  • Wi-Fi mobility enhancements with ANDSF

The lab is being extensively used for analyzing Over-The-Top (OTT) aggregation solutions for cellular Wi-Fi convergence. We are also working on building test setups for different Citizens Broadband Radio Service (CBRS) use cases that could be important from our members perspective. Recently, we hosted an industry-wide SAS-CBSD interoperability event for the CBRS Alliance that included over 15 vendors and 60 participants to validate the baseline functionality of CBRS.

Want to learn more about CableLabs projects leveraging the in-house Mobility Lab?

We are hosting a “Mobility Lab Webinar Series” to showcase various lab activities and tests performed. The first webinar in the webinar series, “CBRS Neutral Host Network (NHN) using Multi-Operator Core Network (MOCN)”, is scheduled for October 30th, 2018.

The webinar will provide:

  • An overview of network sharing, active network sharing, MOCN and CBRS
  • A CBRS NHN use case and its deployment scenarios
  • A CBRS NHN use case lab demonstration

Stay tuned for information on further webinars in the pipeline. In case of any questions/suggestions, please feel free to reach out to Wireless Architect Omkar Dharmadhikari or the Director of Wireless Mark Poletti. Register for the webinar by clicking below.


Register for the Mobility Lab Webinar

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