- Coverage and Capacity Optimization. Coverage and Capacity Optimization techniques are currently under study in 3GPP and will provide continuous coverage and optimal capacity of the network. The performance of the network can be obtained via key measurement data and adjustments can then be made to improve the network performance. For instance, call drop rates will give an initial indication of the areas within the network that have insufficient coverage and traffic counters can be used to identify capacity problems. Based on these measurements, the network can optimize the performance by trading off capacity and coverage.
- Mobility Robustness Optimization. Mobility Robustness Optimization aims at reducing the number of hand over related radio link failures by optimally setting the hand over parameters. A secondary objective is to avoid the ping-pong effect or prolonged connection to a non-optimal cell.
- Mobility Load Balancing. Related to Mobility Robustness is Mobility Load Balancing, which aims to optimize the cell reselection and handover parameters to deal with unequal traffic loads. The goal of the study is to achieve this while minimizing the number of handovers and redirections needed to achieve the load balancing.
- RACH Optimization. To improve the access to the system, RACH Optimization has been proposed to optimize the system parameters based upon monitoring the network conditions, such as RACH load and the uplink interference. The goal is to minimize the access delays for all the UEs in the system and the RACH load.
Tuesday, 16 February 2010
Self Organizing Networks and Enhancements
Monday, 15 February 2010
New Technologies for Mobile Phone Theft prevention
Design Out Crime: Mobile Phone solutions from Design Council on Vimeo.
Three prototype solutions for preventing mobile phone theft have been unveiled.
The i-migo, the 'tie' solution and TouchSafe have been developed to counter crimes such as mobile phone identity fraud, which rose by over 70 per cent in 2009.
TouchSafe uses Near Field Communications (NFC) technology similar to that used by the Oyster Card and requires the handset's owner to carry a small card with them that they touch on the phone every time they make a purchase.
The 'tie' solution makes an association between a handset and theSIM chip so that other SIMs cannot be used on the handset should the mobile phone be stolen.
And the i-migo is a small device carried by the mobile phone's owner that sounds an alert and locks the handset should it be taken outside of a set range. Additionally, it automates the back-up of any data stored on the device.
The prototypes were inspired by a Home Office initiative to develop new ways of preventing mobile phone theft and will be shown off atMobile World Congress in Barcelona next week.
Home Office Minister Alan Campbell said: "As new technology creates new opportunities for the user it can also provide criminals with opportunities as well.
"I believe the solutions developed by this challenge have the potential to be as successful as previous innovations like Chip and Pin, which reduced fraud on lost or stolen cards to an all-time low, and would encourage industry to continue working with us and take them up," Campbell continued.
Sunday, 14 February 2010
LTE World Summit promising to be a grand event
Friday, 12 February 2010
A quick Introduction to M2M Communications
The following is from 3G Americas report on 3GPP standards and their evolution to 4G:
By leveraging connectivity, Machine-to-Machine (M2M) communication would enable machines to communicate directly with one another. In so doing, M2M communication has the potential to radically change the world around us and the way that we interact with machines.
In Rel-10, 3GPP is in the process of establishing requirements for 3GPP network system improvements that support Machine-Type Communications (MTC). The objective of this study is to identify 3GPP network enhancements required to support a large number of MTC devices in the network and to provide necessary network enablers for MTC communication service. Specifically, transport services for MTC as provided by the 3GPP system and the related optimizations are being considered as well as aspects needed to ensure that MTC devices and/or MTC servers and/or MTC applications do not cause network congestion or system overload. It is also important to enable network operators to offer MTC services at a low cost level, to match the expectations of mass market machine-type services and applications.
The 3GPP study on M2M communications has shown potential for M2M services beyond the current "premium M2M market segment." The example of applications for mass M2M services include machine type communications in smart power grid, smart metering, consumer products, health care, and so forth. The current mobile networks are optimally designed for Human-to-Human communications, but are less optimal for M2M applications.
A study item on M2M communications (3GPP TR 22.868) was completed in 2007; however, no subsequent normative specification has been published. For Rel-10 and beyond, 3GPP intends to take the results on network improvements from the study item forward into a specification phase and address the architectural impacts and security aspects to support MTC scenarios and applications. As such, 3GPP has defined a work item on Network Improvements for Machine-Type Communication (NIMTC). The following goals and objectives are described in the work item:
The goal of this work item is to:
A RAN study item to investigate the air interface enhancements for the benefit of M2M communication has also been recently approved. The study will be initiated in early 2010.
- 3GPP TR 22.868: Study on Facilitating Machine to Machine Communication in 3GPP Systems; (http://www.3gpp.org/ftp/Specs/archive/22_series/22.868/)
- 3GPP TR 33.812: Feasibility Study on the Security Aspects of Remote Provisioning and Change of Subscription for M2M Equipment; (http://www.3gpp.org/ftp/Specs/archive/33_series/33.812/)
- 3GPP's initial thoughts on Machine to Machine communication (http://docbox.etsi.org/workshop/2008/2008_06_M2MWORKSHOP/3GPPs_SWETINA_M2MWORKSHOP.pdf)
- M2M Activities in ETSI (http://www.pole-scs.org/index.php?m=6&l=en&x=file.download&h=0&fileid=57063)
- ETSI Workshop on M2M STANDARDIZATION 4th and 5th of June 2008: Agenda (http://docbox.etsi.org/Workshop/2008/2008_06_M2MWORKSHOP/00M2Magenda_FINALVERSION.pdf)
- ETSI Workshop on M2M STANDARDIZATION 4th and 5th of June 2008: Presentations (http://docbox.etsi.org//Workshop/2008/2008_06_M2MWORKSHOP/)
- M2M: the Internet of 50 billion devices, Jan 2010, Win-Win (http://www.huawei.com/publications/view.do?id=6083&cid=11392&pid=10664)
- 5 Myths about M2M (http://www.slideshare.net/blueslice/5-myths-about-m2m-presentation)
M2M will become really big
Thursday, 11 February 2010
UICC and USIM in 3GPP Release 8 and Release 9
In good old days of GSM, SIM was physical card with GSM "application" (GSM 11.11)
In the brave new world of 3G+, UICC is the physical card with basic logical functionality (based on 3GPP TS 31.101) and USIM is 3G application on a UICC (3GPP TS 31.102). The UICC can contain multiple applications like the SIM (for GSM), USIM and ISIM (for IMS). There is an interesting Telenor presentation on current and future of UICC which may be worth the read. See references below.
UICC was originally known as "UMTS IC card". The incorporation of the ETSI UMTS activities into the more global perspective of 3GPP required a change of this name. As a result this was changed to "Universal Integrated Circuit Card". Similarly USIM (UMTS Subscriber Identity Module) changed to Universal Subscriber Identity Module.
The following is from the 3G Americas Whitepaper on Mobile Broadband:
UICC (3GPP TS 31.101) remains the trusted operator anchor in the user domain for LTE/SAE, leading to evolved applications and security on the UICC. With the completion of Rel-8 features, the UICC now plays significant roles within the network.
Some of the Rel-8 achievements from standards (ETSI, 3GPP) are in the following areas:
USIM (TS 31.102)
With Rel-8, all USIM features have been updated to support LTE and new features to better support non-3GPP access systems, mobility management, and emergency situations have been adopted.
The USIM is mandatory for the authentication and secure access to EPC even for non-3GPP access systems. 3GPP has approved some important features in the USIM to enable efficient network selection mechanisms. With the addition of CDMA2000 and HRPD access technologies into the PLMN, the USIM PLMN lists now enable roaming selection among CDMA, UMTS, and LTE access systems.
Taking advantage of its high security, USIM now stores mobility management parameters for SAE/LTE. Critical information like location information or EPS security context is to be stored in USIM rather than the device.
USIM in LTE networks is not just a matter of digital security but also physical safety. The USIM now stores the ICE (In Case of Emergency) user information, which is now standardized. This feature allows first responders (police, firefighters, and emergency medical staff) to retrieve medical information such as blood type, allergies, and emergency contacts, even if the subscriber lies unconscious.
3GPP has also approved the storage of the eCall parameters in USIM. When activated, the eCall system establishes a voice connection with the emergency services and sends critical data including time, location, and vehicle identification, to speed up response times by emergency services. ECalls can be generated manually by vehicle occupants or automatically by in-vehicle sensors.
TOOLKIT FEATURES IMPROVEMENT (TS 31.111)
New toolkit features have been added in Rel-8 for the support of NFC, M2M, OMA-DS, DM and to enhance coverage information.
The contactless interface has now been completely integrated with the UICC to enable NFC use cases where UICC applications proactively trigger contactless interfaces.
Toolkit features have been updated for terminals with limited capabilities (e.g. datacard or M2M wireless modules). These features will be notably beneficial in the M2M market where terminals often lack a screen or a keyboard.
UICC applications will now be able to trigger OMA-DM and DS sessions to enable easier device support and data synchronization operations, as well as interact in DVB networks.
Toolkit features have been enriched to help operators in their network deployments, particularly with LTE. A toolkit event has been added to inform a UICC application of a network rejection, such as a registration attempt failure. This feature will provide important information to operators about network coverage. Additionally, a UICC proactive command now allows the reporting of the signal strength measurement from an LTE base station.
CONTACT MANAGER
Rel-8 defined a multimedia phone book (3GPP TS 31.220) for the USIM based on OMA-DS and its corresponding JavaCard API (3GPP TS 31.221).
REMOTE MANAGEMENT EVOLUTION (TS 31.115 AND TS 31.116)
With IP sessions becoming prominent, an additional capability to multiplex the remote application and file management over a single CAT_TP link in a BIP session has been completed. Remote sessions to update the UICC now benefit from additional flexibility and security with the latest addition of the AES algorithm rather than a simple DES algorithm.
CONFIDENTIAL APPLICATION MANAGEMENT IN UICC FOR THIRD PARTIES
The security model in the UICC has been improved to allow the hosting of confidential (e.g. third party) applications. This enhancement was necessary to support new business models arising in the marketplace, with third party MVNOs, M-Payment and Mobile TV applications. These new features notably enable UICC memory rental, remote secure management of this memory and its content by the third party vendor, and support new business models supported by the Trusted Service Manager concept.
SECURE CHANNEL BETWEEN THE UICC AND TERMINAL
A secure channel solution has been specified that enables a trusted and secure communication between the UICC and the terminal. The secure channel is also available between two applications residing respectively on the UICC and on the terminal. The secure channel is applicable to both ISO and USB interfaces.
RELEASE 9 ENHANCEMENTS: UICC: ENABLING M2M AND FEMTOCELLS
The role of femtocell USIM is increasing in provisioning information for Home eNodeB, the 3GPP name for femtocell. USIMs inside handsets provide a simple and automatic access to femtocells based on operator and user-controlled Closed Subscriber Group list.
Work is ongoing in 3GPP for the discovery of surrounding femtocells using toolkit commands. Contrarily to macro base stations deployed by network operators, a femtocell location is out of the control of the operator since a subscriber can purchase a Home eNodeB and plug it anywhere at any time. A solution based on USIM toolkit feature will allow the operator to identify the femtocells serving a given subscriber. Operators will be able to adapt their services based on the femtocells available.
The upcoming releases will develop and capitalize on the IP layer for UICC remote application management (RAM) over HTTP or HTTPS. The network can also send a push message to UICC to initiate a communication using TCP protocol.
Additional guidance is also expected from the future releases with regards to the M2M dedicated form factor for the UICC that is currently under discussion to accommodate environments with temperature or mechanical constraints surpassing those currently specified by the 3GPP standard.
Some work is also expected to complete the picture of a full IP UICC integrated in IP-enabled terminal with the migration of services over EEM/USB and the capability for the UICC to register on multicast based services (such as mobile TV).
Further Reading:
- Business perspective and Mobile service offer through Future SIM - Telenor (http://www.ux.uis.no/atc08/workshop/Larsen.pdf)
- The role of the UICC in Long Term Evolution all IP networks - Gemalto (http://www.gemalto.com/telecom/download/lte_gemalto_whitepaper.pdf)
- Technical White Paper: Smart Card in IMS - 3G Americas (http://www.3gamericas.org/documents/GEM_WP_IMS.pdf)
- 3GPP TS 31.101: UICC-terminal interface; Physical and logical characteristics (http://www.3gpp.org/ftp/Specs/archive/31_series/31.101/)
- 3GPP TS 31.102: Universal Subscriber Identity Module (USIM) application (http://www.3gpp.org/ftp/Specs/archive/31_series/31.102/)
- 3GPP TS 31.111: Universal Subscriber Identity Module (USIM) Application Toolkit (USAT) (http://www.3gpp.org/ftp/Specs/archive/31_series/31.111/)
- 3GPP TS 31.115: Secured packet structure for (Universal) Subscriber Identity Module (U)SIM Toolkit applications (http://www.3gpp.org/ftp/Specs/archive/31_series/31.115/)
- 3GPP TS 31.116: Remote APDU Structure for (U)SIM Toolkit applications (http://www.3gpp.org/ftp/Specs/archive/31_series/31.116/)
- 3GPP TS 31.220: Characteristics of the Contact Manager for 3GPP UICC applications (http://www.3gpp.org/ftp/Specs/archive/31_series/31.220/)
- 3GPP TS 31.221: Contact Manager Application Programming Interface (API); Contact Manager API for Java Card™ (http://www.3gpp.org/ftp/Specs/archive/31_series/31.221/)
Wednesday, 10 February 2010
Google real time speech translation mobile in couple of years
Live language translation on mobile phones could be just two years away, according to search giant Google. The company already offers text translation services and voice recognition, and Franz Och, head of translation services, says that work has already begun on combining the two.
The technology would work by translating phrases rather than individual words, and the company hopes that by looking at the huge amount of translated text already online, it can produce systems that are much more accurate than current versions. “If you look at the progress in machine translation and corresponding advances in voice recognition, there has been huge progress recently,” he said.
With over 6,000 languages spoken around the world, however, and only 52 currently on offer through Google’s existing translations services, the service is some way from meaning that language teaching in schools becomes redundant. “Clearly, for it to work smoothly, you need a combination of high-accuracy machine translation and high-accuracy voice recognition, and that's what we're working on,” said Mr Och.
So far, that is not yet possible, and language experts suggested that seamless technology is currently a distant prospect. David Crystal, honorary professor of linguistics at Bangor University, said the problems of dealing with speed of speech and range of accents could prove insurmountable.
'No system at the moment can handle that properly,' he added.
Tuesday, 9 February 2010
Coordinated Multi-Point (CoMP) transmission and reception
The following is from the 3G Americas report on CoMP:
Coordinated Multi-Point transmission/reception (CoMP) is considered by 3GPP as a tool to improve coverage, cell-edge throughput, and/or system efficiency.
The main idea of CoMP is as follows: when a UE is in the cell-edge region, it may be able to receive signals from multiple cell sites and the UE’s transmission may be received at multiple cell sites regardless of the system load. Given that, if the signaling transmitted from the multiple cell sites is coordinated, the DL performance can be increased significantly. This coordination can be simple as in the techniques that focus on interference avoidance or more complex as in the case where the same data is transmitted from multiple cell sites. For the UL, since the signal can be received by multiple cell sites, if the scheduling is coordinated from the different cell sites, the system can take advantage of this multiple reception to significantly improve the link performance. In the following sections, the CoMP architecture and the different CoMP schemes will be discussed.
CoMP communications can occur with intra-site or inter-site CoMP as shown in Figure 7.7.
With intra-site CoMP, the coordination is within a cell site. The characteristics of each type of CoMP architecture are summarized in Table 7.1.
An advantage of intra-site CoMP is that significant amount of exchange of information is possible since this communication is within a site and does not involve the backhaul (connection between base stations). Inter-site CoMP involves the coordination of multiple sites for CoMP transmission. Consequently, the exchange of information will involve backhaul transport. This type of CoMP may put additional burden and requirement upon the backhaul design.
An interesting CoMP architecture is the one associated with a distributed eNB depicted in Figure 7.8. In this particular illustration, the Radio Remote Units (RRU) of an eNB are located at different locations in space. With this architecture, although the CoMP coordination is within a single eNB, the CoMP transmission can behave like inter-site CoMP instead.
DL COMP
In terms of downlink CoMP, two different approaches are under consideration: Coordinated scheduling, or Coordinated Beamforming (CBF), and Joint Processing/Joint Transmission (JP/JT). In the first category, the transmission to a single UE is transmitted from the serving cell, exactly as in the case of non-CoMP transmission. However, the scheduling, including any Beamforming functionality, is dynamically coordinated between the cells in order to control and/or reduce the interference between different transmissions. In principle, the best serving set of users will be selected so that the transmitter beams are constructed to reduce the interference to other neighboring users, while increasing the served user’s signal strength.
For JP/JT, the transmission to a single UE is simultaneously transmitted from multiple transmission points, across cell sites. The multi-point transmissions will be coordinated as a single transmitter with antennas that are geographically separated. This scheme has the potential for higher performance, compared to coordination only in the scheduling, but comes at the expense of more stringent requirement on backhaul communication.
Depending on the geographical separation of the antennas, the coordinated multi-point processing method (e.g. coherent or non-coherent), and the coordinated zone definition (e.g. cell-centric or user-centric), network MIMO and collaborative MIMO have been proposed for the evolution of LTE. Depending on whether the same data to a UE is shared at different cell sites, collaborative MIMO includes single-cell antenna processing with multi-cell coordination, or multi-cell antenna processing. The first technique can be implemented via precoding with interference nulling by exploiting the additional degrees of spatial freedom at a cell site. The latter technique includes collaborative precoding and CL macro diversity. In collaborative precoding, each cell site performs multi-user precoding towards multiple UEs, and each UE receives multiple streams from multiple cell sites. In CL macro diversity, each cell site performs precoding independently and multiple cell sites jointly serve the same UE.
UL COMP
Uplink coordinated multi-point reception implies reception of the transmitted signal at multiple geographically separated points. Scheduling decisions can be coordinated among cells to control interference. It is important to understand that in different instances, the cooperating units can be separate eNBs’ remote radio units, relays, etc. Moreover, since UL CoMP mainly impacts the scheduler and receiver, it is mainly an implementation issues. The evolution of LTE, consequently, will likely just define the signaling needed to facilitate multi-point reception.
INTER-CELL INTERFERENCE COORDINATION
Another simple CoMP transmission scheme which relies on resource management cooperation among eNBs for controlling inter-cell interference is an efficient way to improve the cell edge spectral efficiency. The Inter-Cell Interference Coordination (ICIC) enhancement currently being studied for LTE-Advanced can be classified into dynamic Interference Coordination (D-ICIC) and Static Interference Coordination (S-ICIC). In D-ICIC, the utilization of frequency resource, spatial resource (beam pattern) or power resource is exchanged dynamically among eNBs. This scheme is flexible and adaptive to implement the resource balancing in unequal load situations. For S-ICIC, both static and semi-static spatial resource coordination among eNBs are being considered.
More information coule be found in:
- Coordinated Multipoint Trials in the Downlink - Fraunhofer Heinrich Hertz Institute
- 3GPP TR 36.814: Further Advancements for E-UTRA Physical Layer Aspects
Monday, 8 February 2010
3G Americas Publishes New Report on Technology choices for Mobile Broadband
Thursday, 4 February 2010
Bluetooth 3.0 to see the light of day soon
Remember Bluetooth 3.0? Its been a while and the world has changed in the mean time.
Samsung S8500 will launch next-generation Bluetooth 3.0, a protocol that will establish transfer speeds up to eight times faster than 2.0… 24mbps!
Samsung have not been officially announced yet to carry the Bluetooth 3.0 on the S8500 but the device has been leaked to carry 3.0 Bluetooth connectivity that will dwarf previous 3mbps speeds.
The listing from the Bluetooth Special Interest Group it is slim, compact, will come in several colours, and also contains quad-band GSM/EDGE radios. Other details are scarce, and it’s likely that the spec may change considerably before we get our hands on the actual handset
Broadcom is also focusing on Bluetooth 3.0, which allows Bluetooth-centric designers to use the 802.11 physical layer to provide Wi-Fi-speed data transfers in a Bluetooth environment. Bluetooth 3.0 supports bulk synchronization of music libraries between PCs and music players or phones, supports wireless transfer of photos to printers, and sends video files from cameras or phones to computers or televisions. An alternative for Wi-Fi-centric designers, says Ochikubo, is Wi-Fi Direct, which enables Wi-Fi devices to connect and share data without joining a traditional home, office, or hot-spot network. Whatever approach Broadcom’s customers choose to take, he says, he sees Broadcom’s recently announced InConcert Maestro software platform as making the operation simple and transparent for the end user.
In addition to focusing on the higher speeds that Bluetooth 3.0’s Wi-Fi physical layer affords, the Bluetooth Special Interest Group is also focusing on low-power applications with its “Bluetooth low-energy,” or Bluetooth 4.0, specification. Bluetooth low energy will address markets such as health care, sports and fitness, security, and home entertainment.