The Rise and Rise or '4G' - Update on Release-11 & Release-12 features

A recent GSMA report suggests that China will be a significant player in the field of 4G with upto 900 million 4G users by 2020. This is not surprising as the largest operator, China Mobile wants to desperately move its user base to 4G. For 3G it was stuck with TD-SCDMA or the TDD LCR option. This 3G technology is not as good as its FDD variant, commonly known as UMTS.

This trend of migrating to 4G is not unique to China. A recent report (embedded below) by 4G Americas predicts that by the end of 2018, HSPA/HSPA+ would be the most popular technology whereas LTE would be making an impact with 1.3 Billion connected devices. The main reason for HSPA being so dominant is due to the fact that HSPA devices are mature and are available now. LTE devices, even though available are still slightly expensive. At the same time, operators are taking time having a seamless 4G coverage throughout the region. My guess would be that the number of devices that are 4G ready would be much higher than 1.3 Billion.

It is interesting to see that the number of 'Non-Smartphones' remain constant but at the same time, their share is going down. It would be useful to breakdown the number of Smartphones into 'Phablets' and 'non-Phablets' category.

Anyway, the 4G Americas report from which the information above is extracted contains lots of interesting details about Release-11 and Release-12 HSPA+ and LTE. The only problem I found is that its too long for most people to go through completely.

The whitepaper contains the following information:

3GPP Rel-11 standards for HSPA+ and LTE-Advanced were frozen in December 2012 with the core network protocols stable in December 2012 and Radio Access Network (RAN) protocols stable in March 2013. Key features detailed in the paper for Rel-11 include:

HSPA+:

• 8-carrier downlink operation (HSDPA)
• Downlink (DL) 4-branch Multiple Input Multiple Output (MIMO) antennas
• DL Multi-Flow Transmission
• Uplink (UL) dual antenna beamforming (both closed and open loop transmit diversity)
• UL MIMO with 64 Quadrature Amplitude Modulation (64-QAM)
• Several CELL_FACH (Forward Access Channel) state enhancements (for smartphone type traffic) and non-contiguous HSDPA Carrier Aggregation (CA)

LTE-Advanced:

• Carrier Aggregation (CA)
• Multimedia Broadcast Multicast Services (MBMS) and Self Organizing Networks (SON)
• Introduction to the Coordinated Multi-Point (CoMP) feature for enabling coordinated scheduling and/or beamforming
• Enhanced Physical Control Channel (EPDCCH)
• Further enhanced Inter-Cell Interference Coordination (FeICIC) for devices with interference cancellation

Finally, Rel-11 introduces several network and service related enhancements (most of which apply to both HSPA and LTE):

• Machine Type Communications (MTC)
• IP Multimedia Systems (IMS)
• Wi-Fi integration
• Home NodeB (HNB) and Home e-NodeB (HeNB)

3GPP started work on Rel-12 in December 2012 and an 18-month timeframe for completion was planned. The work continues into 2014 and areas that are still incomplete are carefully noted in the report.  Work will be ratified by June 2014 with the exception of RAN protocols which will be finalized by September 2014. Key features detailed in the paper for Rel-12 include:

HSPA+:

• Universal Mobile Telecommunication System (UMTS) Heterogeneous Networks (HetNet)
• Scalable UMTS Frequency Division Duplex (FDD) bandwidth
• Enhanced Uplink (EUL) enhancements
• Emergency warning for Universal Terrestrial Radio Access Network (UTRAN)
• HNB mobility
• HNB positioning for Universal Terrestrial Radio Access (UTRA)
• Machine Type Communications (MTC)
• Dedicated Channel (DCH) enhancements

LTE-Advanced:

• Active Antenna Systems (AAS)
• Downlink enhancements for MIMO antenna systems
• Small cell and femtocell enhancements
• Machine Type Communication (MTC)
• Proximity Service (ProSe)
• User Equipment (UE)
• Self-Optimizing Networks (SON)
• Heterogeneous Network (HetNet) mobility
• Multimedia Broadcast/Multicast Services (MBMS)
• Local Internet Protocol Access/Selected Internet Protocol Traffic Offload (LIPA/SIPTO)
• Enhanced International Mobile Telecommunications Advanced (eIMTA) and Frequency Division Duplex-Time Division Duplex Carrier Aggregation (FDD-TDD CA)

Work in Rel-12 also included features for network and services enhancements for MTC, public safety and Wi-Fi integration, system capacity and stability, Web Real-Time Communication (WebRTC), further network energy savings, multimedia and Policy and Charging Control (PCC) framework.

Whitepaper: 4G Mobile Broadband Evolution: 3GPP Release 11 & Release 12 and Beyond from Zahid Ghadialy