From "dual card dual standby" to "dual communication", vivo took the lead in promoting the implementation of the DSDA architecture

I believe that many users who use dual-SIM dual-standby mobile phones have experienced this feeling: when the secondary card receives calls and text messages, the network connection of the main card will fluctuate or even be interrupted.Such a situation may be barely acceptable for most ordinary users, but for gamers and e-sports players, the ever-changing "battlefield" situation cannot tolerate the slightest delay, even if it is a millisecond of lag, it may be related to "The opportunity of "Super God" was missed, and even the match point of "return against the wind" was lost.

The recently launched iQOO 10 series products, through a series of technological innovations and breakthroughs, are the first in the industry to realize "the main card 5G playing games, the secondary card VoNR high-definition calls, which greatly improves the delay stability of dual-card 5G playing games., and effectively improve the user's pain point of "frequent disconnection of dual-SIM 5G games", significantly renewing the user's game experience.

5G dual-card dual-pass

FromDSDS to DSDA: OriginOSThe Relentless Pursuit

A large part of the shortcomings of dual-SIM dual-standby mobile phones in network connection in the past was due to the limitations of the dual-SIM DSDS architecture.It is nominally called "dual card dual standby", but it can only achieve "single", that is, although there are two cards, the two cards use time-division multiplexing to utilize radio frequency resources, which means that at the same time onlyOne card is allowed to send and receive data, so once the secondary card has data exchange, the main card will be disconnected from the network.This is not only reflected in scenarios such as incoming calls and text messages from the secondary card, but also affects the network connection of the primary card during some secondary card signaling (such as periodic IMS re-registration).

Later, with the evolution of technology, a compromise solution emerged: if it is based on LTE (4G) VoLTE calls or NR (5G) VoNR calls, in order to better ensure the data Internet experience, the mobile phoneThe data channel can be automatically temporarily switched to the secondary card when the secondary card makes a call, so that the secondary card becomes a data card for a short time. Although this can solve some problems, it is not a cure for the symptoms, and there will still be a network disconnection for a few seconds during switching., still can not meet the stable network needs of game users.When the DSDS architecture is iterated to DR-DSDS, the two cards can finally receive data at the same time, but the secondary card will still affect the main card when sending data.

During this process of being subject to the technical level, the OriginOS team predicted the new pain points of future user scenarios in advance, and took the lead in proposing the DSDA-Like solution requirements to the platform manufacturers, aiming to avoid secondary problems through the concurrency capability of dual cards.The impact of the card on the delay of the main card, but it failed to land.

The industry's first commercial use:The realization of 5G dual-card dual-pass

After the arrival of the 5G era, under the guidance of the "user-oriented" value concept, the OriginOS team continues to conduct user research and data collection, facing platform manufacturers, to fully demonstrate the huge pain point for users from multiple dimensionsInfluence, and repeated communication and demonstration with them, to convey the importance, feasibility and urgency of DSDA technology to platform manufacturers.Finally, as 5G enters the mature application stage, DSDA technology has ushered in a new dawn.

To complete the landing of DSDA technology is not an easy task.For the OriginOS team, to advance this work, not only the belief and persistence of "effectively improving the user experience" is required, but also the coordination of multi-party cooperative relationships: it involves a lot of cross-company cooperation externally, including in-depth communication with many industry giants, to upgrade the SoC chip architecture; internally, cross-domain cooperation is required to upgrade software, radio frequency, and antenna design.At the same time, in order to meet the commercial standards, basic issues such as power consumption and SAR value compliance when dual-card concurrency are required must be fully considered.The information synchronization of the dual-card capability and the consistent cognition of key indicators will jointly ensure the implementation of DSDA.

The innovative DSDA architecture is the first to support 5G+5G dual-card dual-pass, and realizes such as: data card in the process of calling/surfing the Internet, non-data card will not miss incoming calls, and data card will not be interrupted to access the Internet;When non-data card sends and receives short messages and interacts with network signaling, a series of functions such as data card surfing the Internet/playing games without lag, truly achieves the technical goal that the two cards of a dual-card dual-standby mobile phone can send and receive data at the same time on the user plane, so that the user's Internet access, phone calls, information collection, and online gaming experience have been greatly improved.

iQOO 10 series supports dual SIM and dual access

On the iQOO 10 series, this time is not only the transformation of its user-side thinking, but also a perfect embodiment of the spirit of "pursuing perfection and creating surprises".From 0 to 1, OriginOS will continue to innovate more innovative product function designs in the future, and use technology to illuminate a bright future.