Qualcomm and Ericsson has demonstrated the voice call handover from LTE to 3G network. This functionality is the 3GPP standard called Single Radio Voice Call Continuity (SRVCC). When the users move out of a LTE coverage, the call will be automatically handed over to WCDMA or GSM network during the call.

According to a 2011 infringement lawsuit filed in Germany, Motorola demanded 2.25% in royalty fees for Apple’s use Motorola’s 3H/UMTS patent in Apple’s product. Since Apple uses Qualcomm’s chipset in its products, it is arguing that it is covered by cross-licensing agrement between Motorola and Qualcomm around 3G standards.

Kobian launched its new tablet under Mercury brand. mTab Neo is powered by 1Ghz dual core processor and in-built 3G module. It runs on Android operating system.

3G Benefit: 3G modules offers more benefits interms of speed and performance compared to the 2G modules.

•  Compared to GPRS and EDGE modules, 3G modules offer higher downlink and uplink data rates. See speed comparision below.
• Latenties on 3G network is considerably better than 2G networks – WCDMA (150 ms), HSPA (100 ms), HSPA+ (5ms).
• For network operators, 3G networks provides better use of wireless spectrum compared to the 2G networks.

 3G Standards: The air interface standards for GSM-based 3G modules are developed by 3rd Generation partnership Project (3GPP) which is a collaboration between groups of telecommunication associations. For CDMA-based 3G modules, the standards are developed through 3GPP2 group.

 3G Speed: The speed of 3G modules depends on the network conditions and the performance of the device. The actual speeds are usually lower than the theoritical speeds shown below,

3G Frequency Bands: 3G Modules operate at varierty of frequency bands depending on the carrier network. Typically a module SKU will be configured to support certain frequency bands to operate on a certian geographic region or a certain carrier.

3G Module Form Factors: PCIe is the most common form factor avaialble through many module vendors. However for devices that have size constraints, modules incorporating surface mount technologies such as Land Grid Array (LGA) or Ball Grid array (BGA) offer smaller sizes. Modules with propreitery form factor are also offered by vendors. Lack of M2M module standards is one of the barriers for adoption and there are efforts underway by the indutry to address this issue.

3G Module Interfaces: Interfaces are capabilities supported by the modules through hardware and/or software. Some of the common interfaces supported on 3G modules are,

• Power : Power interface is mandatory for all modules and the supply ranges from 3.0V – 4.5V.
• UART (Universal Asynchronous Receiver/Transmitter):  Some host devices might use UART, though mostly it is used for debugging purpose. UART rates vary from 1200bps to 115200bps.
• USB (Universal Serial Bus): USB is usually the primary data interface used on 3G modules since it supports higher data rates.
• UICC (Universal Integrated Circuit Card): GSM-based 3G modules will have UICC interface which is based on IS0 7816-3.
• Antenna: Antenna connectors are generally availble on-board the 3G modules. To improve receiver performance, a diversity antenna connector is also sometimes avaialble on the modules.
• GPS (Global Positioning System): Many of the 3G modules have integrated GPS solution.GPS antenna port may be on a separate port or shared with the diversity antenna port.
• SPI(Serial Peripheral Interface) :SPI interface is genrally used to connect to the external display devices.
• I2C (Inter-Integrated Circuit Bus): I2C interface is used to communicate with external display device or storage device.
• SDIO (Secure Digitial Input/Output): SDIO interface is used for interfacing with external SD card.
• PCM (Pulse Code Modulation): PCM interface in 3G modules is used for digital audio transfer.
• Analog Audio Interface: For devices that require voice support, 3G modules will provide analog audio interfaces.

3G Module Certification

Before the 3G module can be commercially used with in a device, it has go  through several certification process.

• Global certification Forum (GCF) : GCF enables certification of any mobile device based on 3GPP technologies. GCF certification is supported by leading operators from every region of the world. GCF approval requires both conformance lab testing and field trials.
• PTCRB : PTCRB is the North American operators certification body.It provides a framework within which device certification can take place for members of teh PTCRB.3G modules are tested at PTCRB accredited labs which manage the certification process.
• FCC : In order to obtain a modular approval teh FCC has identified requirements that must be addressed in the application for equipment authorization. These requrirments are specified in this FCC document.
• Network Operator Certification: In addition to PTCRB/GCF & FCC, the module should also be certified by the network operator. In fact, the network operators might have industry certifications as a pre-condition for lab entry.