Tuesday, April 29, 2008
Wednesday, April 16, 2008
EDGE
EDGE is designed to enhance the existing GSM network and therefore should be cheaper to deploy than WCDMA. However, it doesn't offer the same kind of capacity improvements.
EDGE is an acronym for Enhanced Global Rates for Global Evolution. WCDMA stands for Wide Band Code Division Multiple Access, while GSM stands for Global Systems for Mobile Communications.
Enhanced Data rates for GSM Evolution (EDGE), Enhanced GPRS (EGPRS), or IMT Single Carrier (IMT-SC) is a digital mobile phone technology that allows increased data transmission rates and improved data transmission reliability.
EDGE (also known as Enhanced Data Rates for Global Evolution) is a radio signalling technology for 3G mobile networks. It boosts data transfer rates and volumes on existing GSM/GPRS networks by significantly increasing data transfer speeds.
How does EDGE work?
EDGE works by improving the signalling interface used to communicate over the radio waves. Typically, EDGE brings three times the performance of GPRS, achieving an average data rate of 80 to 160 kbps per user with mobile terminals supporting 2-4 timeslots. It is great for applications that transfer large amounts of data between a mobile phone and enterprise networks - such as rich email messages that include attachments.
About EDGE
Due to its high data transfer rates, EDGE has been adopted as part of ITU's (International Telecommunication Union) family of technologies. Currently, EDGE is standardized by the same 3GPP standardization body as the 3G technology, WCDMA, harmonizing the development of both EDGE and WCDMA.
EDGE benefits
* Faster connection
* Greater data volumes achieved
* Significant increase in functionality
* Can interoperate with GSM networks for global coverage
EDGE is an acronym for Enhanced Global Rates for Global Evolution. WCDMA stands for Wide Band Code Division Multiple Access, while GSM stands for Global Systems for Mobile Communications.
Enhanced Data rates for GSM Evolution (EDGE), Enhanced GPRS (EGPRS), or IMT Single Carrier (IMT-SC) is a digital mobile phone technology that allows increased data transmission rates and improved data transmission reliability.
EDGE (also known as Enhanced Data Rates for Global Evolution) is a radio signalling technology for 3G mobile networks. It boosts data transfer rates and volumes on existing GSM/GPRS networks by significantly increasing data transfer speeds.
How does EDGE work?
EDGE works by improving the signalling interface used to communicate over the radio waves. Typically, EDGE brings three times the performance of GPRS, achieving an average data rate of 80 to 160 kbps per user with mobile terminals supporting 2-4 timeslots. It is great for applications that transfer large amounts of data between a mobile phone and enterprise networks - such as rich email messages that include attachments.
About EDGE
Due to its high data transfer rates, EDGE has been adopted as part of ITU's (International Telecommunication Union) family of technologies. Currently, EDGE is standardized by the same 3GPP standardization body as the 3G technology, WCDMA, harmonizing the development of both EDGE and WCDMA.
EDGE benefits
* Faster connection
* Greater data volumes achieved
* Significant increase in functionality
* Can interoperate with GSM networks for global coverage
Push to talk
What is Push to talk?
Push to talk is a software technology for mobile phones that is designed to let you use your phone in real-time direct one-to-one and one-to-many voice communication. The primary technologies behind Push to talk are SIP (Session Initiation Protocol) and IP networks, such as GPRS, or WCDMA.
How does it work?
Push to talk technology channels voice communication through a data network for always-on* functionality. Mobile phones that are equipped with Push to talk software and that have been subscribed to a mobile network's Push to talk communication service can establish a telephone conference with one person or a group of people. Pushing a specific or dedicated button on the mobile phone opens a voice channel to all selected participants, whose phones will automatically play the caller's voice through the phone loudspeaker. Because it is similar to walkie-talkie, Push to talk allows only one participant to talk at a time.
What are the benefits of Push to talk?
* A quick telephone conference with a group of people
* Participants don't have to answer the phone, as the speaker's voice is automatically played through their phones' loudspeakers
Push-to-talk (PTT), also known as Press-to-Transmit, is a method of conversing on half-duplex communication lines, including two-way radio, using a momentary button to switch from voice reception mode to transmit mode.
PTT PoC or Push to Talk over Cellular is a feature similar to walkie-talkie that is provided over a cellular phone network. A typical Push to Talk connection connects almost instantly. One significant advantage of PoC is allowing a single person to reach an active talk group at a button press, thus users no longer need to make several calls to coordinate with a group.
Push-to-talk calls are half duplex communications — while one person speaks, the other(s) listen(s). Traditional mobile phone networks and devices utilize full-duplex communications, allowing customers to call other persons on a mobile or land-line network and be able to simultaneously talk and hear the other party. Such communications require a connection to be started by dialing a phone number and the other party answering the call, and the connection remains active until either party ends the call or the connection is dropped due to signal loss or a network outage. Such a system does not allow for casual transmissions to be sent to other parties on the network without first dialing them up, like is allowed on two-way radios. Full-duplex operation on mobile phone networks is made possible by using separate frequencies for transmission and reception.
Mobile Push-to-Talk service, offered by some mobile carriers, adds functionality for individual half-duplex transmissions to be sent to another party on the system without needing an existing connection to be already established. Since the system is half-duplex (utilizing a single frequency), only one user can transmit by PTT at a time; the other party is unable to transmit until the transmitting user unkeys their PTT button. Currently, PTT service is supported only between parties on the same mobile carrier service, and users with different carriers will be unable to transmit to each other by PTT. However, the advancement of this service will likely bring interconnectivity of PTT traffic between different networks in the near future.
Push to talk is a software technology for mobile phones that is designed to let you use your phone in real-time direct one-to-one and one-to-many voice communication. The primary technologies behind Push to talk are SIP (Session Initiation Protocol) and IP networks, such as GPRS, or WCDMA.
How does it work?
Push to talk technology channels voice communication through a data network for always-on* functionality. Mobile phones that are equipped with Push to talk software and that have been subscribed to a mobile network's Push to talk communication service can establish a telephone conference with one person or a group of people. Pushing a specific or dedicated button on the mobile phone opens a voice channel to all selected participants, whose phones will automatically play the caller's voice through the phone loudspeaker. Because it is similar to walkie-talkie, Push to talk allows only one participant to talk at a time.
What are the benefits of Push to talk?
* A quick telephone conference with a group of people
* Participants don't have to answer the phone, as the speaker's voice is automatically played through their phones' loudspeakers
Push-to-talk (PTT), also known as Press-to-Transmit, is a method of conversing on half-duplex communication lines, including two-way radio, using a momentary button to switch from voice reception mode to transmit mode.
PTT PoC or Push to Talk over Cellular is a feature similar to walkie-talkie that is provided over a cellular phone network. A typical Push to Talk connection connects almost instantly. One significant advantage of PoC is allowing a single person to reach an active talk group at a button press, thus users no longer need to make several calls to coordinate with a group.
Push-to-talk calls are half duplex communications — while one person speaks, the other(s) listen(s). Traditional mobile phone networks and devices utilize full-duplex communications, allowing customers to call other persons on a mobile or land-line network and be able to simultaneously talk and hear the other party. Such communications require a connection to be started by dialing a phone number and the other party answering the call, and the connection remains active until either party ends the call or the connection is dropped due to signal loss or a network outage. Such a system does not allow for casual transmissions to be sent to other parties on the network without first dialing them up, like is allowed on two-way radios. Full-duplex operation on mobile phone networks is made possible by using separate frequencies for transmission and reception.
Mobile Push-to-Talk service, offered by some mobile carriers, adds functionality for individual half-duplex transmissions to be sent to another party on the system without needing an existing connection to be already established. Since the system is half-duplex (utilizing a single frequency), only one user can transmit by PTT at a time; the other party is unable to transmit until the transmitting user unkeys their PTT button. Currently, PTT service is supported only between parties on the same mobile carrier service, and users with different carriers will be unable to transmit to each other by PTT. However, the advancement of this service will likely bring interconnectivity of PTT traffic between different networks in the near future.
Thursday, April 3, 2008
IMEI number - & its analysis
IMEI = "International Mobile Equipment Identity"
The International Mobile Equipment Identity - a unique 15-digit code used to identify an individual GSM mobile telephone to a mobile network. It can be displayed on most phones by dialling *#06#. It is also usually printed on the compliance plate under the battery.
ou can check all known information regarding manufacturer, model type, and country of approval of a handset.--http://www.numberingplans.com/?page=analysis&sub=imeinr
Retrieving IMEI Information from an older Sony or Sony Ericsson handset can be done by entering these keys: Right * Left Left * Left * (Other service menu items will be presented with this key combination).
The IMEI information can be retrieved from most older Nokia mobile phones by pressing *#92702689# (*#WAR0ANTY#), this opens the warranty menu in which the first item is the serial number (the IMEI). The warranty menu also shows other information such as the date the phone was made and the life timer of the phone.
Central Equipment Identity Register is a database of the IMEI numbers of blacklisted handsets. If a device's IMEI number is listed on CEIR, it is not supposed to work on any service provider.--http://www.gsmworld.com/using/security/index.shtml
A common usage of the CEIR is with stolen cellphones. Once a user reports to the operator about the theft, the cell phone's IMEI number goes to CEIR, supposedly making the device unusable in any network (although this does not always work).
At present, there are over 40 operators connected to the IMEI DB from the following countries:
The International Mobile Equipment Identity - a unique 15-digit code used to identify an individual GSM mobile telephone to a mobile network. It can be displayed on most phones by dialling *#06#. It is also usually printed on the compliance plate under the battery.
ou can check all known information regarding manufacturer, model type, and country of approval of a handset.--http://www.numberingplans.com/?page=analysis&sub=imeinr
Retrieving IMEI Information from an older Sony or Sony Ericsson handset can be done by entering these keys: Right * Left Left * Left * (Other service menu items will be presented with this key combination).
The IMEI information can be retrieved from most older Nokia mobile phones by pressing *#92702689# (*#WAR0ANTY#), this opens the warranty menu in which the first item is the serial number (the IMEI). The warranty menu also shows other information such as the date the phone was made and the life timer of the phone.
Central Equipment Identity Register is a database of the IMEI numbers of blacklisted handsets. If a device's IMEI number is listed on CEIR, it is not supposed to work on any service provider.--http://www.gsmworld.com/using/security/index.shtml
A common usage of the CEIR is with stolen cellphones. Once a user reports to the operator about the theft, the cell phone's IMEI number goes to CEIR, supposedly making the device unusable in any network (although this does not always work).
At present, there are over 40 operators connected to the IMEI DB from the following countries:
- Belgium
- Chile
- Cyprus
- Czech Republic
- Denmark
- Finland
- France
- Germany
- Greece
- Hungary
- Ireland
- Italy
- Kenya
- Malta
- Norway
- Portugal
- South Africa
- Spain
- Sweden
- United Kingdom
Wednesday, April 2, 2008
HSPA - Mobile Broadband Today
HSPA--High Speed Packet Access
HSPA is part of the GSM 3G network and is (predominately) a software upgrade of the network infrastructure. To use , you need
a mobile device.
HSPA has a great legacy, coming from the GSM family. It is the latest technology to enable even faster data rates for mobile
users available today. The evolution has seen familiar acroymns such as GPRS (the first packet technology giving around
128kb/s) to EDGE (an enhanced version offering around 240kb/s) and then the introduction of 3G networks increasing the data
rate to 384kb/s.
The various enhancements on the HSPA route are as follows:
HSDPA – High Speed Downlink Packet Access
– the ability to receive large files to your mobile device such as email attachments, PowerPoint presentations or web pages.
HSUPA – High Speed Uplink Packet Access – this is a further enhancement to increase the speed by which you communicate from
your mobile device. The upload speeds which were at 384kb/s with HSDPA are now increased to a maximum of 5.7Mb/s
HSUPA is available in a few countries today with 2008 really seeing this as common place.
HSPA Evolved – this is also known as HSPA+ is the next step and is more focused on delivering data services enabling
speeds of up to 42Mb/s in the downlink and 11Mb/s in the uplink. HSPA Evolved will be available in late 2008 early 2009.
All of these are acronyms mean Mobile Broadband, today!
Common terms used by mobile network operators to market the service are: 3G+, NextG, 3G Broadband, 3.5G and many
more. As Sri Lankans we faced this marketing showers...[Mobitel Vs. Dialog]
High-speed packet access (HSPA) and not WiMax is set to dominate mobile broadband in the coming years -- if hardware makers
get behind the technology.
A report by analyst Juniper Research predicts 70 percent of mobile-broadband subscribers will use the souped-up version of 3G
by 2012. Total mobile-broadband subscribers will number 1.2 billion by then, it said -- equivalent to nearly one in three
mobile subscribers worldwide.
HSPA -- high-speed packet access -- delivers mobile broadband speeds in excess of 500Kbps, and up to several Mbps. There are
currently around five million HSPA subscribers worldwide, according to international 3G advocate the UMTS (Universal Mobile
Telecommunications Services) Forum.
so guys you know now that HSDPA is years ahead of HSCSD
HSCSD (High Speed Circuit Switched Data) is a specification for data transfer over GSM networks. HSCSD utilizes up to four
9.6Kb or 14.4Kb time slots, for a total bandwidth of 38.4Kb or 57.6Kb.
14.4Kb time slots are only available on GSM networks that operate at 1,800MHz. 900Mhz GSM networks are limited to 9.6Kb time
slots. Therefore, HSCSD is limited to 38.4Kbps on 900Mhz GSM networks. HSCSD can nly achieve 57.6Kbps on 1,800Mhz GSM
networks.
HSPA is part of the GSM 3G network and is (predominately) a software upgrade of the network infrastructure. To use , you need
a mobile device.
HSPA has a great legacy, coming from the GSM family. It is the latest technology to enable even faster data rates for mobile
users available today. The evolution has seen familiar acroymns such as GPRS (the first packet technology giving around
128kb/s) to EDGE (an enhanced version offering around 240kb/s) and then the introduction of 3G networks increasing the data
rate to 384kb/s.
The various enhancements on the HSPA route are as follows:
HSDPA – High Speed Downlink Packet Access
– the ability to receive large files to your mobile device such as email attachments, PowerPoint presentations or web pages.
HSUPA – High Speed Uplink Packet Access – this is a further enhancement to increase the speed by which you communicate from
your mobile device. The upload speeds which were at 384kb/s with HSDPA are now increased to a maximum of 5.7Mb/s
HSUPA is available in a few countries today with 2008 really seeing this as common place.
HSPA Evolved – this is also known as HSPA+ is the next step and is more focused on delivering data services enabling
speeds of up to 42Mb/s in the downlink and 11Mb/s in the uplink. HSPA Evolved will be available in late 2008 early 2009.
All of these are acronyms mean Mobile Broadband, today!
Common terms used by mobile network operators to market the service are: 3G+, NextG, 3G Broadband, 3.5G and many
more. As Sri Lankans we faced this marketing showers...[Mobitel Vs. Dialog]
High-speed packet access (HSPA) and not WiMax is set to dominate mobile broadband in the coming years -- if hardware makers
get behind the technology.
A report by analyst Juniper Research predicts 70 percent of mobile-broadband subscribers will use the souped-up version of 3G
by 2012. Total mobile-broadband subscribers will number 1.2 billion by then, it said -- equivalent to nearly one in three
mobile subscribers worldwide.
HSPA -- high-speed packet access -- delivers mobile broadband speeds in excess of 500Kbps, and up to several Mbps. There are
currently around five million HSPA subscribers worldwide, according to international 3G advocate the UMTS (Universal Mobile
Telecommunications Services) Forum.
so guys you know now that HSDPA is years ahead of HSCSD
HSCSD (High Speed Circuit Switched Data) is a specification for data transfer over GSM networks. HSCSD utilizes up to four
9.6Kb or 14.4Kb time slots, for a total bandwidth of 38.4Kb or 57.6Kb.
14.4Kb time slots are only available on GSM networks that operate at 1,800MHz. 900Mhz GSM networks are limited to 9.6Kb time
slots. Therefore, HSCSD is limited to 38.4Kbps on 900Mhz GSM networks. HSCSD can nly achieve 57.6Kbps on 1,800Mhz GSM
networks.
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