Showing posts with label TD-LTE. Show all posts
Showing posts with label TD-LTE. Show all posts

Tuesday, August 1, 2017

ZTE, China Mobile and Qualcomm Demo Pre 5G on TD-LTE

ZTE, together with China Mobile and Qualcomm, announced the demonstration of a Pre5G gigabit rate solution on a TD-LTE commercial network in Quanzhou, Fujian in China leveraging multi-carrier aggregation, 4 x 4 MIMO, 256QAM and other advanced technologies.

During the latest demonstration, China Mobile and ZTE also verified the Pre5G gigabit solution utilising Qualcomm commercial Snapdragon 835 platform and achieved a peak rate of up to 700 Mbit/s using a 10-stream data transmission on a single phone.

ZTE noted that in a white paper assessing 5G vision and requirements, the IMT-2020 (5G) promotion group stated that 5G should support a user data rate of between 100 Mbit/s and 1 Gbit/s. One of ZTE's four-core Pre5G technologies, Giga+ mobile broadband (MBB), uses massive MIMO, multi-carrier aggregation and high-order modulation technologies to improve spectrum efficiency and network-wide capacity and is designed to deliver a peak rate of over 1 Gbit/s.

Previously, in June Quanzhou Mobile and ZTE jointly implemented a commercial deployment of 3D-MIMO in big video environments. With 16 commercial terminals connected, the single-carrier downlink peak cell rate achieved was nearly 730 Mbit/s, while the single-carrier 16-stream downlink peak rate for 3D-MIMO reached 700 Mbit/s, equivalent to a three-carrier rate of up to 2.1 Gbit/s.
ZTE noted that the use in the latest demonstration of 4 x 4 MIMO, multi-carrier aggregation and high-order baseband modulation (256QAM) technologies, together with commercial chips in the commercial network, is designed to significantly improve the efficiency of spectrum utilisation without increasing bandwidth, and can provide a user data rate of more than 1 Gbit/s.


ZTE's Pre5G solution involves both key 5G technologies such as massive MIMO and commercial availability on 4G networks, as well as enhancements to the LTE Advanced (LTE-A) Pro technologies in the 3GPP architecture, including massive CA, unified delivery network (UDN), 256QAM, licensed assisted access (LAA), WiFi link aggregation (LWA) and narrowband Internet of things (NB-IoT).

Tuesday, November 24, 2015

First 3.5 GHz LTE FDD-TDD 3 Carrier Aggregation Test

Nokia Networks, Deutsche Telekom and Cosmote (Deutsche Telekom’s subsidiary in Greece and leading network operator in the country) have demonstrated a world-first: LTE-Advanced 3 carrier aggregation combining LTE-FDD in band 3 (1.8 GHz) with LTE-TDD in band 42 (3.5 GHz). The showcase, completed with the commercially available Nokia Flexi Multiradio 10 Base Station, confirms the ability of 3.5 GHz LTE-TDD technology to increase mobile broadband capacity and improve the consumer experience.

The demonstration used the Nokia Single RAN Advanced platform, including the Nokia Flexi Multiradio 10 Base Station for both LTE-FDD and -TDD technologies, with its high-capacity TD-LTE-Advanced 8-pipe radio.

“Deutsche Telekom is a real innovation leader. Hand in hand with our NatCos we are shaping the local markets, especially in LTE. Spectrum plays a fundamental role for mobile communications as we look to exploit opportunities to meet the growing demand for network capacity. The demonstration of FDD-TDD 3 carrier aggregation together with our partners, sets a benchmark for a completely new combination of technologies including the increasingly recognized band 42 which will be expected to be a mainstream TDD band," Rachid El Hattachi, SVP Technology Architecture & Blueprints, Deutsche Telekom.

http://www.nokia.com

Monday, November 2, 2015

Nokia to Test Artemis pCell Wireless with Operators

Nokia Networks has agreed to test Artemis Networks' pCell wireless technology in 2016 with wireless operators, initially in large indoor venues and other high density areas.

The companies will jointly offer pCell Proof-of-Concept deployments to selected Nokia Networks customers. The companies may extend the collaboration to consider further advanced features that could be enabled by pCells, such as precise 3D location positioning.

Nokia said pCell has the potential to enhance the capacity of conventional 4G TD-LTE networks in certain use cases, while remaining compatible with unmodified devices.

The pCell concept uses radios to transmit signals that deliberately interfere with each other, combining to synthesize tiny pCells, each just one cm in size. Every mobile device has its own pCell, a “personal cell,” each getting the full spectrum capacity.

“In addition to creating transformative internal innovations, we continuously look for and evaluate external innovations to bring the most advanced solutions to the operators. We are keen to see the potential for pCell in enhancing 4G LTE downlink and uplink capacity given the rapidly growing network demands such as concurrent HD video streaming,” stated Hossein Moiin, Executive Vice President and CTO at Nokia Networks.

Steve Perlman, Founder & CEO of Artemis Networks, said: “We are delighted to collaborate with Nokia, the world’s leading 4G LTE network vendor, to offer pCell Proof-of-Concept deployments to selected customers. pCell technology has the potential to significantly increase the downlink and uplink capacity of spectrum, while remaining compatible with existing 4G LTE devices.”

http://networks.nokia.com/news-events/press-room/press-releases/nokia-networks-artemis-to-trial-pcell-technology
http://www.artemis.com/pcell


  • Steve Perlman, Artemis Founder & CEO, has previously served as  an Apple Principal Scientist and Microsoft Division President.  He holds over 140 U.S. patents and is credited with the invention of Apple Quicktime.

Friday, October 30, 2015

China Mobile and Nokia Sign Supply Contract

Nokia Networks and China Mobile signed a comprehensive framework agreement for mobile communications equipment and services valued at more than US$1 billion (EUR 930 million). Deliveries under the agreement commenced in Q1 2015 and will continue in 2016.

Under the agreement, Nokia Networks provides its TD-LTE-Advanced technology and 2G/3G/4G core network solutions including Voice over LTE (VoLTE). Software and professional services, including network planning, implementation and care, will support China Mobile's 4G network rollout during 2015 and beyond. The operator plans to deploy one million TD-LTE base stations by the end of the year to build the world's largest TD-LTE network.

The agreement was signed on October 29 by Li Huidi, Executive Vice President at China Mobile, and Hans-Juergen Bill, Executive Vice President at Nokia and also Chairman of the Board of Directors of Nokia Networks GmbH & Co KG in Germany, in the presence of Chinese Premier Li Keqiang and German Chancellor Angela Merkel.

http://company.nokia.com/en/news/press-releases/2015/10/30/nokia-networks-china-mobile-sign-one-billion-usd-agreement-covering-2015-contracts


Thursday, October 15, 2015

Nokia Lands Big TD-LTE-Advanced deal with China Mobile

China Mobile has awarded a contract to Nokia Networks to deploy one million TD-LTE base stations by the end of 2015. The contract further expands its TD-LTE footprint with deployment of Flexi Multiradio 10 Base Stations across the country, supporting 18 provinces and mega cities including Beijing, Guangdong and Shanghai.

Nokia Networks is now the largest non-Chinese vendor. The new deal marks the third phase of an ongoing TD-LTE deployment with China Mobile and another milestone in the successful co-operation between the two companies. 

Friday, September 18, 2015

China Mobile and ZTE Sign TD-LTE with South Korea

ZTE has signed a cooperation agreement with China Mobile Research Institute and South Korea’s Ministry of Science, ICT and Future Planning (MSIP) for research including TDD/FDD data roaming and VoLTE.

"We are delighted to cooperate with ZTE and China Mobile in this project," said Dr. Cui Kuishi, head of the Convergence Technology research department at MSIP’s Telecommunications Institute. "China Mobile and ZTE are leaders in the global telecommunications industry, and this strategic cooperation will help South Korea with the deployment of 4G interconnection and interoperability tests, especially the tests based on TD-LTE."

"We are excited about this tripartite cooperation with MSIP and China Mobile,” said Jason Cao, ZTE’s chief representative in South Korea. “The adoption of common telecommunications standards in China and South Korea will generate increased opportunities for industry and commerce, as trade and partnerships between businesses in the two countries grow under the China-South Korea Free Trade Agreement.”

http://www.zte.com.cn

Sunday, August 23, 2015

Swisscon Implements 3-Carrier LTE FDD and TDD

Swisscom has tested an LTE-Advanced three-carrier aggregation solution combining LTE in both FDD and TDD modes. The demonstration used three carriers in two bands in a radio access network and used commercial-grade chipsets.

The Swiss operator deployed the solution on August 18, 2015 in a Swisscom shop in Zurich and connected to its live, commercial network.  Two LTE TDD carriers, each with 20 MHz bandwidth in the 2.6 GHz frequency band (B41), and one LTE FDD carrier with 15 MHz in the 2.1 GHz band (B1) were used. The live demonstration in Zurich was supported by Ericsson Radio Access Network software 15B and hardware as well as by Qualcomm's Snapdragon X12 LTE modem.

Swisscom plans to roll out this solution to subscribers in Swiss metropolitan areas by summer 2016 to coincide with three-carrier FDD/TDD smartphone availability.

Ericsson said the combination of the three carriers in FDD-LTE and TDD-LTE will significantly enhance the future capacity of the network. The new technology will allow more users to benefit from peak data rates for downloads and uploads when using mobile internet, entertainment or enterprise services. In this specific set-up, a maximum 335 Mbps in the downlink was achieved.

http://www.swisscomm.com
http://www.ericsson.com

Wednesday, July 15, 2015

China Mobile Demos 220 Mbps on 3.5 GHz interband TD-LTE

China Mobile has demonstrated 220 Mbps peak data transmission rates based on 3.5 GHz interband TD-LTE-Advanced carrier aggregation.

The live demo, which was conducted at this week's Mobile World Congress Shanghai 2015, used a commercial Nokia Flexi Multiradio 10 Base Station and a test device to run combined 3.5 GHz and 2.6 GHz TD-LTE frequency bands.

The 3.5 GHz band is another important spectrum resource for 4G networks, which will be used in TD-LTE. This demo not only proves the commercial feasibility of the 3.5 GHz TD-LTE band, but also shows 3.5 GHz can be aggregated with current bands, enhancing 4G networks with more capacity.”

http://networks.nokia.com

Monday, December 15, 2014

Nokia Networks and STC Demo TDD-FDD Aggregation

Nokia Networks and Saudi Telecom Company (STC) demonstrated TDD-FDD Carrier Aggregation using a commercial chipset.

The demonstration was carried out using a new band combination of FDD 1800 MHz and TDD 2300 MHz.

Nokia Networks said high frequency bands have limited uplink coverage, but operators can significantly extend TDD coverage with TDD-FDD carrier aggregation with no additional changes to the network. Load balancing between TDD- and FDD-LTE networks ensures the best coverage and speed for all subscribers in both networks.

http://networks.nokia.com/

Tuesday, October 7, 2014

SingTel Hits 260 Mbps with FDD / TDD Carrier Aggregation

SingTel achieved data rates of up to 260 Mbps using LTE Advanced FDD / TDD Carrier Aggregation on commercial hardware and software.

In tests, which took place at the SingTel office in Singapore on October 3, 2014, utilizing a Qualcomm Snapdragon 810 processor and Ericsson's LTE software designed to support the company's multi-standard RBS6000 family of base stations for macro and small-cell networks. In the demonstration, Ericsson aggregated 20 MHz of LTE FDD spectrum with 20 MHz of LTE TDD spectrum, supporting peak data rates up to 260 Mbps.

Ericsson said FDD / TDD Carrier Aggregation enables operators to complement their FDD networks with a cost-efficient deployment of TDD. For operators using TDD bands, the TDD uplink coverage can be a constraint. By combining TDD and FDD spectrum through Carrier Aggregation, low band FDD can deliver good uplink coverage while the TDD band can be leveraged for higher downlink capacity. LTE FDD / TDD Carrier Aggregation enables spectrum from both LTE FDD and LTE TDD to be combined to deliver higher peak data speeds and improve app coverage across the network. It increases the effective TDD coverage area by up to 70%, reducing the cost of providing TDD coverage. It also ensures efficient utilization of spectrum, increasing both the combined FDD / TDD coverage area and capacity of the network.

Commercial devices supporting FDD / TDD Carrier Aggregation are expected in 2015.

Tay Yeow Lian, Managing Director for Networks, SingTel says: "We are already using dual-layers of LTE FDD with LTE-Advanced Carrier Aggregation, and we know the performance of our mobile network is critical to ensuring that our customers have a great experience on their smartphones and tablets. Therefore, we will continue to explore the future option of bundling even TDD spectrum into the LTE carrier aggregation to expand network capacity, allowing our customers to enjoy consistent high data speed download even at high traffic areas."

http://www.ericsson.com/news/1861153


In June 2014, SingTel is launching a 4G mobile broadband service boasting data speeds of up to 300Mbps, double the speeds of currently available 4G services in Singapore.

SingTel's 300 Mbps uses LTE-Advanced technology from Ericsson.

SingTel is using LTE-Advanced (LTE-A) carrier aggregation to combine 20 MHz bandwidth each of its 1800MHz and 2600MHz spectrum bands. 

 The first live site at Singapore Expo is now ready for service.  By the end of the year, more than half of the island will be covered, including areas such as the CBD, Changi Airport and popular shopping malls. Customers can look forward to nationwide coverage by the end of 2015.

Wednesday, September 3, 2014

China Telecom Tests 260 Mbps FDD- TDD Carrier Aggregation with Nokia

China Telecom, in partnership with Nokia Networks, has demonstrated the world-first FDD-TDD carrier aggregation including a user device chipset.

In the demo, Nokia’s LTE base station achieved interoperability with a commercial user chipset developed by Marvell. A stable peak download speed of 260 Mbps was achieved in the carrier aggregation demonstration with FDD 20 MHz in 1.8 GHz and TDD 20 MHz in 2.6 GHz spectrum. For the total speed, FDD spectrum contributed to 150 Mbps while TDD spectrum contributed to 110 Mbps.

“It’s highly satisfying to achieve yet another world-first* toward commercialization and globalization of FDD-TDD carrier aggregation,” said Zhang Qi, Vice President of TD-LTE, Nokia Networks. “This achievement with our partner China Telecom will also encourage other operators globally to look at further spectrum combination for FDD-TDD carrier aggregation into advanced 3GPP Rel-12. We are already working with many major operators globally to deliver FDD-TDD convergence for commercial use.”

http://www.nsn.com

Wednesday, June 25, 2014

ZTE Wins TD-LTE Contract in Dominican Republic

Wind Telecom has selected ZTE to build the first 4G TD-LTE network in the Dominican Republic. The network will operate in 2.5 – 2.7 GHz spectrum and cover major cities and rural areas of the nation.

ZTE said its unified platform EPC and eNodeB solutions, based on ZTE’s proprietary Cloud Radio technology, will help Wind Telecom achieve savings in capital expenditure, and operation and maintenance costs, and lay solid foundations for future growth.

ZTE will also provide mobile devices that will appeal to users and help them take advantage of the broadband capabilities of the new network.

"This next-generation network is an investment in the future of the Dominican Republic,” said José Clase, Chairman of the Board of Wind Telecom. “This platform will help bridge the digital divide and raise the economic competitiveness of the Dominican Republic by helping to lift the standard of education. The high-speed network connectivity will also deliver an enhanced user experience for consumers.”

ZTE has deployed commercial 4G TD-LTE networks for operators globally including China Mobile, China Mobile Hong Kong, Bharti Airtel and Hi3G in Sweden.

http://wwwen.zte.com.cn/en/press_center/news/201406/t20140624_425255.html

Thursday, May 15, 2014

Qualcomm Demos LTE-TDD Broadcast in China

Qualcomm, in collaboration with Sohu.com, conducted a live public demonstration of LTE-TDD Broadcast in China, featuring High Efficiency Video Coding (HEVC) and Dynamic Adaptive Streaming Over HTTP (DASH) technologies.  LTE Broadcast enables the multicast of high-demand content such as live sporting events, breaking news or software updates, so that multiple users receive the same content simultaneously.

Qualcomm said the demo utilized its LTE Broadcast solution for the evolved Multimedia Broadcast Multicast Service (eMBMS) platform along with devices based on its reference designs, Snapdragon 400 processors and integrated Qualcomm Gobi modems.

The demo took place today during the Qualcomm Reference Design & Wireless Innovation Summit in Shenzhen.

"We're excited to be supporting the growth and evolution of LTE networks worldwide," said Raj Talluri, Senior Vice President of Product Management, QTI. "With LTE Broadcast, operators can better utilize their existing LTE infrastructure to deliver customers an optimized, premium video experience on the latest mobile devices without overloading their networks."

"This demonstration marks an important milestone in the deployment of LTE Broadcast, which we believe will significantly enhance our customers' ability to view popular, live content directly on their mobile devices," said Zeng, Xiongjie, President of Sohu Mobile Video.  "We're excited to be working with QTI to bring this innovative technology to market."

http://www.qualcomm.com
http://www.sohu.com

Monday, April 21, 2014

China Mobile Verifies FDD/TDD Carrier Aggregation with Huawei

China Mobile has verified multiple core TD-LTE-Advanced technologies including FDD/TDD Carrier Aggregation, MSA, 256QAM, inter-site CoMP, and MU-MIMO in field tests conducted in partnership with Chengdu Electronic Technology University and Huawei.


Huawei said this pre-commercial verification of 3GPP R12 technologies marks a milestone in improving the entire TD-LTE network performance and user peak throughput. Some highlights of the testing:

  • LTE TDD & FDD Carrier Aggregation (CA) testing enabled China Mobile and Huawei to validate the CA peak throughput by considering a scenario where LTE TDD is the primary cell and LTE FDD is the secondary cell. The air interface test results reached the theoretical peak data rate corresponding to a used network configuration of 250 Mbps.
  • LTE Multi-Stream Aggregation (MSA) between TD-LTE and LTE FDD sites were both tested, with the results showing flexible handover or traffic concurrency for users, based on network coverage, load and interference.
  • MU-MIMO was validated with four data streams based on an 8-antenna network, which resulted in a peak data rate improvement of 100%. The test result for inter-site CoMP on a PTN-based network also showed a 30% increase in throughput for cell edge users.
  • TD-LTE indoor and outdoor testing was done with 256QAM. Compared to 64QAM, 256QAM enables a 33% peak data rate gain, and a cell average performance improvement of more than 20% in an indoor test environment.

http://pr.huawei.com/en/news/hw-332282-td-lte.htm

Wednesday, February 26, 2014

BTI Wireless Builds TD-FEMTOs for China Mobile with Radisys

BTI Wireless, which supplies TD-FEMTO end-to-end solutions providing 3G and 4G Small Cell and Gateway System products, has selected Radisys’ Trillium software for deployment of an advanced LTE-TDD solution for China Mobile.

Specifically, BTI Wireless will leverage Radisys’ Trillium TOTALeNodeB software and protocol stacks and commercial-off-the-shelf (COTS) ATCA platforms to provide dual-mode TD-SCDMA and LTE-TDD small cells and gateways,  achieving successful circuit switched (CS) fallback and a seamless 3G to 4G migration path for China Mobile.

BTI Wireless will begin LTE-TDD network trial deployments next quarter in the Chinese market, and will also deploy LTE-FDD (Frequency Division Duplex) in markets outside of China.

“This customer win signifies another key success for our solutions in the Chinese LTE-TDD market and further substantiates our position as a global leader in LTE,” said Todd Mersch, general manager, Software and Solutions, Radisys. “Not only do we supply award-winning small cell software, but our delivery of the gateway software allows our customers to extend to the core, providing a true one-stop, end-to-end LTE solution.”

http://www.radisys.com


Saudi Telecom to Launch TDD LTE-A with Huawei

Saudi Telecom has succeeded Huawei to deploy TDD LTE-Advanced technology in its network.  network to the advanced 4th generation LTE-A network. Financial terms were not disclosed.

"Saudi Arabia is considered as the largest telecom market in the Middle East. Therefore, launching the first quad systems network in the world (GSM/ UMTS/ LTE TDD/ LTE FDD), and upgrading the network to the advanced 4th generation LTE-A, enhances the Internet service in the Kingdom significantly, and offers a new experience for the STC's customers in the field of mobile wireless broadband services," stated Dr. Khaled Albayari, Senior Deputy of STC Group for Technology & Operations.

http://www.huawei.com

Tuesday, February 25, 2014

Huawei and Vodafone Announce FDD and TDD Carrier Aggregation

Huawei and Vodafone announced the first implementation of LTE-Advanced FDD+TDD Convergence Carrier Aggregation (CA).

At Mobile World Congress, the companies said their prototype achieved a single user peak downlink speed of more than 500 Mbps. The demonstration involved 3 FDD carriers and 1 TDD carrier.

Vodafone currently has 800MHz, 1800MHz, and 2600MHz, a total of 50MHz spectrum bandwidth in FDD mode and 20MHz of 2600MHz in TDD
mode in Spain. This latest breakthrough in FDD+TDD Carrier Aggregation technology will boost Vodafone’s network capacity in the country and enable the operator to have more flexibility in deploying 2CC and 3CC CA solutions in the future.

Vodafone first rolled out its 1800MHz and 2600MHz commercial LTE services in the main cities of Spain at the beginning of 2013, with a peak speed of 150Mbps/user.

http://www.huawei.com

Wednesday, February 5, 2014

NSN and Sprint Hit 2.6 Gbps with TD-LTE

Sprint demonstrated 2.6 Gbps TD-LTE throughput over a single sector using NSN's commercially available Flexi Multiradio 10 Base Station. The previous record was 1.6 Gbps.

The tests, which were conducted at NSN’s Mountain View facility in California, aggregated 120 MHz of Sprint’s TDD spectrum to achieve an unprecedented speed of 2.6 Gbps.

NSN said its plans include a high-capacity Flexi Multiradio System Module for TD-LTE that can deliver up to 5 Gbps of peak throughput from a single site. The company said this enhanced Flexi Multiradio System Module is the industry’s highest capacity TD-LTE baseband, enabling operators to roll out TD-LTE networks with fewer base stations and fewer sites, saving up to 50 percent in capital expenses and operational costs. The module features integrated transport technology, removing the need for additional hardware for connecting to transport networks. IPsec security is also built in, providing a secure tunnel between the base station and core network to protect traffic from eavesdropping, unauthorized access or distributed denial-of-service (DDoS) attacks.

"Sprint is excited to partner with NSN to enable Sprint Spark and lead the way globally in enabling future mobile broadband innovation,” said Stephen Bye, chief technology officer at Sprint. “Combining our unique spectrum assets with TD-LTE-Advanced features and NSN’s next generation TD-LTE base station has allowed us to achieve the world’s first 2.6 Gbps throughput over TD-LTE.”

"With demand for high-speed mobile broadband services growing rapidly around the world, NSN and Sprint are showing how operators can unlock the highest capacity from their TDD spectrum,” said Zhang Qi, vice president for TD-LTE at NSN. “At Mobile World Congress, we will demonstrate how the record speed was achieved, proving that TD-LTE technology and the ecosystem are ready for global roll out by any operator with TDD spectrum. With our help, the operators can meet and exceed the expectations of mobile broadband customers.”

http://www.sprint.com
http://www.nsn.com

NSN: Big Gains from Coordinated Multi-cell Scheduling

Using coordinated multi-cell scheduling to reduce interference between adjacent base stations can deliver up to 30 percent faster downlink speeds at the cell edge, according to Nokia Solutions and Networks.

Coordinated scheduling is implemented as software within the base stations, avoiding the need for any additional hardware.

NSN is introducing a software upgrade that adds coordinated scheduling to its Smart Scheduler for Flexi Multiradio 10 Base Stations.

"Mobile broadband users will experience superior performance everywhere, not just when they’re at the center of a cell,” said Zhang Qi, vice president for TD-LTE at NSN. “Furthermore, NSN’s solution eliminates the need for any additional hardware. Our coordinated scheduling is a simple software upgrade in the base station because we want to keep the LTE network architecture lean and reduce unnecessary complexity.”

http://www.nsn.com

Tuesday, January 14, 2014

China Mobile Demos First LTE TDD to GSM Voice Handover with Ericsson

Ericsson and China Mobile successfully demonstrated the world’s first enhanced Single Radio Call Continuity (eSRVCC) towards GSM on a live LTE TDD network.  The demo, which occurred in advance of the China Mobile Global Partner Conference 2013 last month, tested devices in a moving vehicle performing seamless eSRVCC voice handover without any perceivable interruption.

SRVCC is a technology which enables seamless handover of voice over LTE (VoLTE) calls to 2G or 3G networks when the user moves out of LTE coverage. The eSRVCC technology applied in the demonstration is based on 3GPP R10 standard. eSRVCC is the enhanced SRVCC used in the China Mobile Lab.

Ericsson said the eSRVCC technology applied in the demonstration was based on 3GPP R10 standard. eSRVCC is the enhanced SRVCC used in the China Mobile Lab. Compared with SRVCC defined in 3GPP R8, when handover occurs during roaming, the newly added ATCF and ATGW functionality in R10 in the IMS domain can prevent the update of E2E signaling and bearer carrier, therefore avoiding call drops caused by long handover delay, which improves the user perception for cross-domain handover in spotty LTE coverage.

In the demonstration, Ericsson provided the end–to-end commercial equipment covering LTE TDD and GSM radio access with RBS 6000, Evolved Packet Core, a complete IP Multimedia Subsystem (IMS) with TAS (Telephony Application Server), CSCF (Call Session Call Function), SBC (Session Border Controller), MRS (Media Resource System), MGC (Media Gateway Controller), and the Mobile Softswitch Solution with pooled MSC Servers, to successfully implement LTE to GSM voice handover. Handover delay in the live network environment was measured constantly below 200 ms, far less than the 300 ms for SRVCC defined in 3GPP. This provides excellent user experience with seamless voice over LTE to GSM voice handover.

In addition, in the demonstration Ericsson enabled the Fast Return function on the network side, which allows a quick and direct return from 2G to 4G network within one second after the completion of a call, and ensures advanced user experience. With Fast Return function, it is possible to avoid unreachable paging during inter-RAN cell re-selection when Circuit Switched Fallback (CSFB) and eSRVCC are deployed for improved user experience.

http://www.ericsson.com

See also