In this video, we explore the concept of Dual Connectivity in 5G and LTE networks, focusing on how this technology enhances both coverage and data rates for users. You'll understand the protocol stack, split bearer functionality, and the different options available when connecting 4G and 5G simultaneously. Learn how Dual Connectivity improves user experience, mobility, and network performance.
Key Points Covered:
* Dual Connectivity Overview: Combining 4G e-Node-B and 5G g-Node-B for improved performance.
* MCG & SCG Bearers: Master Cell Group and Secondary Cell Group functionality.
* Split Bearer: How data flows between the primary and secondary nodes.
Option-3 Modes: A breakdown of Option-3, Option-3A, and Option-3x.
* Mobility & Robustness: How Dual Connectivity helps with load balancing and mobility in high-demand scenarios.
* Increased Throughput: The benefits of leveraging both LTE and 5G simultaneously for faster data rates.
✨ Why it Matters:
* Enhances user coverage in areas where 5G signals might be spotty.
* Provides higher data rates by combining the strengths of 4G and 5G.
* Offers seamless mobility and improved user experience during handovers.
Watch Now to dive deep into the inner workings of Dual Connectivity!
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Key Points Covered:
* Dual Connectivity Overview: Combining 4G e-Node-B and 5G g-Node-B for improved performance.
* MCG & SCG Bearers: Master Cell Group and Secondary Cell Group functionality.
* Split Bearer: How data flows between the primary and secondary nodes.
Option-3 Modes: A breakdown of Option-3, Option-3A, and Option-3x.
* Mobility & Robustness: How Dual Connectivity helps with load balancing and mobility in high-demand scenarios.
* Increased Throughput: The benefits of leveraging both LTE and 5G simultaneously for faster data rates.
✨ Why it Matters:
* Enhances user coverage in areas where 5G signals might be spotty.
* Provides higher data rates by combining the strengths of 4G and 5G.
* Offers seamless mobility and improved user experience during handovers.
Watch Now to dive deep into the inner workings of Dual Connectivity!
Subscribe to "Learn And Grow Community"
YouTube : https://www.youtube.com/@LearnAndGrowCommunity
LinkedIn Group : https://linkedin.com/company/LearnAndGrowCommunity
Follow #LearnAndGrowCommunity
#5g #dualconnectivity #lte #telecom #5gtechnology #wirelesscommunication #5gnr #4g #DataRates #networkperformance #technologyexplained #carrieraggregation #5gnetwork #5grevolution #5gran #5gcore #5garchitecture #endc #5gvs4g #4gvs5g #5gnr #5gnsa #5gsa #5gnonstandalone #lte #telco #telecommunications #wirelesstechnology #3gpp #newradio #5gdeployment
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LearningTranscript
00:00Hi.
00:01In the last session, we talked about the spectrum allocation
00:04in 5G NR.
00:05We also discussed about some of the concepts in 5G NR,
00:09like carrier aggregation, bandwidth part,
00:12which are important for optimizing the 5G performance
00:15and network efficiency.
00:17Now, in this session, we will be talking about dual connectivity
00:21concept in 5G NR.
00:23Dual connectivity is a feature that
00:26enhances the performance and the reliability
00:28of the modern wireless networks.
00:31Consider a scenario where a 4G eNB
00:34is providing the main coverage for a user device.
00:37And at the same time, the UE can also
00:40connect to a nearby 5G gNB coverage.
00:44If the UE only connects to the 4G eNB,
00:48then it can have the benefit of better coverage.
00:51But the data rates would be relatively low.
00:54And if the UE only connects to the 5G gNB,
00:58then it can enjoy the faster data rates.
01:00But at the same time, it may experience weaker coverage
01:04or frequent handovers due to more limited coverage
01:07of 5G signals, especially on the higher bands.
01:10Now, if you look at the protocol stack,
01:13then you will notice two type of data barriers,
01:15the MCG barrier from the primary node
01:18and the SCG barrier from the secondary node.
01:21MCG stands for master cell group.
01:24And SCG refers to the secondary cell group.
01:28Another important concept is a split barrier.
01:31In case of a split barrier, one of the nodes
01:33forwards the data plane packets to another node
01:36over to the X2 entropy.
01:39And later, the data is combined at the PDCP layer
01:42before it reaches to the core network.
01:45The split barriers can be terminated
01:47at either the primary node or secondary node.
01:50It depends on the network configuration.
01:53It is important to note that for split barriers,
01:56it is generally preferred and recommended
01:59that the primary node and the secondary node
02:01are co-located because there would
02:04be a significant amount of data transfer needs to be routed
02:07over the X2 interface.
02:10If you remember, we discussed about the option 3
02:12during the 5G deployment option session.
02:15So option 3 refers to the dual connectivity
02:18between 5G NR and 4G LTE using a 4G core network.
02:23You can see this in the center architecture
02:25in this picture here.
02:27Now, if the user plane data is split between the MCG and SCG,
02:32then it is known as option 3A.
02:35If the user plane is handled only through the MCG,
02:38this configuration is referred as option 3.
02:42And if the user plane data is managed by the SCG,
02:45this identifies as option 3X.
02:49So you can see in the center architecture for option 3,
02:53user plane data is routed from EPC to E node B.
02:57And then a portion of data is routed to G node B.
03:01And then both E node B and G node B
03:04sends this user plane data to the UE simultaneously.
03:08And later, UE will combine this all data
03:11received from different nodes.
03:12So this is option 3.
03:15Now coming to the option 3A in the left architecture.
03:19This is option 3A.
03:21So here, control plane data is handled by E node B.
03:25But user plane data is directly routed to the G node B
03:29from SCG.
03:31Now, it is not routed by the E node B.
03:34So one stream coming directly from EPC to E node B.
03:38And second stream directly coming from EPC to G node B.
03:42Then they are sending data to the UE
03:44simultaneously over the air.
03:47Now coming to the option 3X in the right architecture.
03:52So this is similar to the option 3.
03:54But here is a small difference.
03:56Now, first, the user plane data is routed from EPC to G node B.
04:01And then one stream is transmitted to the UE
04:05from this G node B. And second stream
04:07is routed to the E node B. And then E node B
04:10will transmit that stream towards the UE.
04:13Dual connectivity offers multiple benefits
04:16to improve network performance and user experience.
04:20With dual connectivity, the UE connects to both nodes
04:24at the same time.
04:25So it has fast and efficient load balancing
04:28across the network.
04:30And our coverage from the millimeter wave bands
04:32may be inconsistent due to its bad propagation characteristics.
04:36So in such scenarios, dual connectivity
04:39can enhance the mobility and robustness of the network
04:43and can ensure more stable connections,
04:45even in challenging environments.
04:48In addition, dual connectivity can
04:50help to accomplish higher data rates and per user throughput
04:54because it can use both the radio access
04:57technologies at the same time.
04:59OK, so that's it for today.
05:01I hope you are pretty much familiar now
05:02with the dual connectivity concept.
05:04In the next session, we will be talking
05:06about 5G flexible numerology.
05:09So stay tuned for the updates.
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05:12then please subscribe to learn and grow community
05:15for regular updates.
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