Shulou(Shulou.com)11/24 Report--

Multi-SIM card function is one of the earliest technological breakthroughs of smartphones, which meets the connectivity challenge by supporting users to access multiple cellular networks.

However, this technology does not realize the full potential of using two cellular connections at the same time. For example, users have to stop what they are doing, such as playing games or watching videos online, to get through to the phone.

In the past few years, we have made great progress, and the latest generation of multi-SIM card technology, known as "dual card and dual access" (DSDA), has overcome these limitations.

In February 2022, Qualcomm Technology launched the first generation of 5G dual cards and dual links through Snapdragon X70 modems and RF systems, enabling the first batch of terminals to support 5G+5G and 5G+4G dual cards. Now, through the Snapdragon X755G modem and RF system, the dual-card dual-pass function has been further enhanced through dual data connection features.

Evolution of 5G dual-card and dual-pass

The implementation of dual-card and dual-access means that the new generation of multi-SIM card technology enables 5G smartphones to connect to two cellular networks simultaneously through two SIM cards:

This technology allows users to make voice calls on one SIM card while connecting to the network through another SIM card.

In addition, Qualcomm's solution extends dual-card dual access to support both 5G and 4G connections. This is a major upgrade to the dual-card dual-standby (DSDS) feature, which supports only one SIM card at a time to stay connected using data or voice.

On the basis of the previous generation of dual-card dual-access characteristics, the second-generation dual-card dual-card dual-access introduces dual data connections for more diverse and advanced 5G data use cases, allowing end users to use two data connections of two SIM cards at the same time.

By enabling applications to use two data connections at the same time, Snapdragon is improving the user experience and eventually driving the popularity of 5G.

In addition to benefiting users, this technology will also benefit OEM vendors:

Enhance the end-user experience and support the next generation of terminals to use 5G connections more intelligently.

Now, let's take a look at some of the key usage scenarios of dual-card dual-pass enablement.

1. Dual data connection (SIM card 1 and SIM card 2 use data simultaneously)

The key use case of 5G dual-card and dual-access can significantly enhance data performance for end users, enabling SIM card 1 and SIM card 2 to use two data connections at the same time, choosing the best connection between the two or aggregating two connections, if needed, for higher data throughput.

Dual data connectivity also enables OEM vendors to create product innovation and differentiation advantages for more complex use cases.

two。 Games and data + voice (SIM card 1 play games and use data, SIM card 2 voice calls)

Dual-card and dual-pass allows users to make uninterrupted voice calls while playing games and using data through 5G.

Imagine: with the support of terminal SIM card 1, users are using 5G to play multiplayer games.

Suppose the user receives a call on SIM card 2 at this time:

Thanks to dual cards and dual links, users can answer the phone immediately and have a seamless voice conversation while playing the game, with almost no delay and no impact on game performance.

3. Voice + voice (SIM card 1 and SIM card 2 are connected to the voice call service at the same time, one of which is on call waiting)

Dual-card dual-pass allows the user to accept, reject or wait for a call while the SIM card 1 is making a voice call.

For example, suppose a user uses both a personal SIM card and a work SIM card in the terminal. Thanks to dual-card and dual-access, users can answer private calls while keeping their work lines open in important workplaces, and can quickly switch between personal and work calls without missing any calls.

4. Games and data + MMS / SMS

Another related scenario for the key use case of dual-card communication is games (or data usage) + message transmission (MMS or SMS).

When using SIM card 1 to play games based on 5G network (or watching movies or downloading files online), users can also use SIM card 2 to send and receive messages at the same time.

The future trend of 5G dual-card and dual-link supporting dual data connection

Building a terminal that supports dual data connectivity requires a redesign of the phone, from radio frequency (RF) antennas, RF modules, modems and RF subsystems, to the operating system and user interface.

Snapdragon fully considered the needs of end-users at the beginning of the solution, supporting OEM manufacturers to differentiate with new use cases and enhance the end-user experience.

Dual data connections pave the way for a superior user experience. The adoption of dual data connections introduces Qualcomm API, which helps determine the best data path between the two connections and optimizes performance when using data connections across two SIM cards.

Dynamically determine the best connection between the two data paths according to the situation, this function can help OEM manufacturers open up new opportunities to expand dual-card dual-access to other types of terminals while enabling innovative smartphone use cases.

To serve users, operators, and OEM vendors, Qualcomm is pushing technology forward in practical ways to empower people and the Smart Internet of everything.

This article comes from a signed article by Mutaz Shukair, director of product management of Qualcomm Technologies.

* this feature requires network support for call waiting.

Snapdragon and Qualcomm branded products are the products of Qualcomm Technologies and / or its subsidiaries.

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