Perhaps the issue is that most users will be switching between 3g and 4g coverage, at least initially. Making that seamless may require not allowing simultaneous use, at least at first.
Can wimax/Evo do simultaneous voice/data?
- Thread starter 6tr6tr
- Start date
The good people over at Engadget said today that the EVO will use the CDMA radio for voice, which would leave WiMAX radio free to do data. This is the theory of how it will work. This all assumes you have both 4G and 3G coverage at the same time.
I look forward to Sprint aggressively rolling out 4G coverage over the next 1-2 years. Whats funny is, even with Sprints small 4G coverage currently, given how lackluster ATTs 3G covreage is, Sprint is in theory on software patch away from taking the one thing ATT can say it does uniquely, and doing it better
Can't really share where this came from, maybe the person will speak up "ahem"
As of now, simultaneous voice and data will not be offered.
As of now, simultaneous voice and data will not be offered.
Lets just hope is possible sinc ethis is one of the few things (if not the only one) that matter to me in comparison with the crapy at&t services...
As of right now, no, but some have hinted that it may be up and working at launch. Technically, its possible. GSM phones have two separate antennas, one for voice, one for data. CDMA phones have 1 antenna for both. The evo has 1 antenna for voice and 3g/1x data and another antenna for 4G(wimax) so its possible. As of right now, Sprint is saying they are still testing the possibilities. Regardless you will only be able to do it in 4G service areas once it is possible.
This is going to get tricky as one might bounce back and forth between 3g and 4g.
As much as I would like to see it released with simultaneous surf and talk they would really need to explain that if you bounce from 4g to 3g your going to loose any active data session. Otherwise your going to have customers complaining they EVO doesn't work as advertised and Sprint doesn't need bad reviews on this device or 4g for that matter.
It wouldn't be tricky at all. The phone is always 3G, it never actually goes over wimax so if you lose the 4G, you'd never lose the call and the two would never interfere with each other. And if there's no 4G, then everything goes as normal - data over 3G with no call, no data if on a call. Nothing tough about that. It can all be done with about 5 lines of code.
As for customers, that's easily handled with a small alert icon (unintrusive like webos please) that tells you: "No 4G, cannot get data connection until phone call ends or you reenter a 4G area."
As for customers, that's easily handled with a small alert icon (unintrusive like webos please) that tells you: "No 4G, cannot get data connection until phone call ends or you reenter a 4G area."
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This makes sense. If you're on a call and using WiMAX and you lose 4G coverage, data will step down to EVDO and will have to stop while the call is still going. Once you hang up data can resume. Then when you're back in 4G coverage simultaneous voice and data can start working again. There might be some tweaking of the network and phone's software to make these hand offs graceful, but it shouldn't be that hard. Think of it like a phone switching between EVDO and 1xRTT depending on coverage.
bdizzel1982
Well-known member
I would say it all depends on Sprint and what they choose to do since technically 3G CDMA networks can support this feature its called SVDO, I have posted info and the web link below.
CDG : News & Events : CDG Press Releases
CDMA DEVELOPMENT GROUP ANNOUNCES THE COMPLETION OF CDMA2000 1X ADVANCED SPECIFICATIONS
Enhancements quadruple the voice capacity of existing CDMA2000 1X networks
COSTA MESA, CA — August 17, 2009 — The CDMA Development Group (CDG) today announced that the specifications for CDMA2000? 1X Advanced have been completed and published by the 3rd Generation Partnership Project 2 (3GPP2). 1X Advanced allows 3G CDMA operators to significantly increase the voice capacity of their CDMA2000 1X network by taking advantage of several interference cancellation and radio link enhancements. Among these improvements are base transceiver station (BTS) interference cancellation, improved power control, early frame termination, and smart blanking. 1X Advanced enhancements can be integrated all at once or in phases, offering operators an evolutionary approach to expanding existing networks based on their individual market needs. The complete set of 1X Advanced enhancements can theoretically quadruple the voice capacity of CDMA2000 1X systems in the same 1.25 MHz of spectrum.
“Both large and small CDMA2000 operators will benefit greatly from the voice capacity gains enabled by 1X Advanced,” said Perry LaForge, executive director of the CDG. “In addition to lowering the average cost per call for more affordable voice services, 1X Advanced also frees up channels to deliver 1xEV-DO broadband data services. Additionally, as operators consider augmenting their 3G CDMA networks with LTE and Mobile WiMAX, 1X Advanced will enable them to get more out of their existing circuit-switched voice networks for as long as needed.”
1X Advanced builds on the CDMA2000 1X technology platform, which has been providing superior voice quality and capacity for more than ten years. Operators can now transition to 1X Advanced gradually and economically, while sustaining backward compatibility. The spectral efficiency of the 3GPP2 standard has been recently enhanced with advanced voice codecs like Enhanced Variable Rate Codec-B (EVRC-B) and the use of quasi-linear interference cancellation (QLIC) techniques, which are already providing up to 50 percent higher voice capacity in today’s networks. The next step would be to move to 1X Advanced, which is a simple channel card upgrade (expected to be commercial in the second half of 2010) with new devices supporting mobile receive diversity, enabling them to more than double voice capacity immediately after the channel upgrade.
A complementary device enhancement known as simultaneous 1X Voice and EV-DO Data (SVDO) will also become available during the same timeframe and will enable CDMA2000 devices to access EV-DO packet data services while in an active 1X circuit-switch voice call. For example, users will be able to send emails or access the Web while on voice calls; phones with GPS can update maps or download real-time traffic information while on voice calls, etc. This device enhancement, which enables these concurrent voice and data services, is independent of the air link standard and infrastructure.
For more information, please visit CDMA Development Group.
About CDMA2000
CDMA2000 is a widely deployed 3G technology, with 288 operators in 103 countries and territories serving 472 million subscribers. Counting 2G cdmaOne™ subscribers, there are over 480 million CDMA users worldwide. CDMA2000 1xEV-DO is a widely-deployed 3G CDMA (IMT-2000) solution offering mobile broadband to 120 million people across a wide range of devices. CDMA2000 has been chosen by operators in both developed and emerging markets, and is deployable in the 450, 700, 800, 1700, 1900, AWS and 2100 MHz bands. More than 2,110 CDMA2000 devices from over 115 suppliers have been introduced to the market, including more than 528 Rel. 0 and 118 Rev. A devices on 107 CDMA2000 1xEV-DO Rel. 0 and 66 Rev. A systems. More information on CDMA2000 is available on the CDG Web site at CDMA Development Group.
About CDG
The CDMA Development Group is a trade association formed to foster the worldwide development, implementation and use of CDMA2000 technologies. The more than 140 member companies of the CDG include many of the world’s largest wireless carriers and equipment manufacturers. The primary activities of the CDG include development of CDMA2000 features and services, public relations, education and seminars, regulatory affairs and international support. Currently, there are more than 500 individuals working within various CDG subcommittees on CDMA2000-related matters.
# # #
Note to editors
cdmaOne is a registered trademark of the CDMA Development Group. CDMA2000 is a registered trademark of the Telecommunications Industry Association (TIA-USA). All other trademarks are the property of their respective owners.
CDG : News & Events : CDG Press Releases
CDMA DEVELOPMENT GROUP ANNOUNCES THE COMPLETION OF CDMA2000 1X ADVANCED SPECIFICATIONS
Enhancements quadruple the voice capacity of existing CDMA2000 1X networks
COSTA MESA, CA — August 17, 2009 — The CDMA Development Group (CDG) today announced that the specifications for CDMA2000? 1X Advanced have been completed and published by the 3rd Generation Partnership Project 2 (3GPP2). 1X Advanced allows 3G CDMA operators to significantly increase the voice capacity of their CDMA2000 1X network by taking advantage of several interference cancellation and radio link enhancements. Among these improvements are base transceiver station (BTS) interference cancellation, improved power control, early frame termination, and smart blanking. 1X Advanced enhancements can be integrated all at once or in phases, offering operators an evolutionary approach to expanding existing networks based on their individual market needs. The complete set of 1X Advanced enhancements can theoretically quadruple the voice capacity of CDMA2000 1X systems in the same 1.25 MHz of spectrum.
“Both large and small CDMA2000 operators will benefit greatly from the voice capacity gains enabled by 1X Advanced,” said Perry LaForge, executive director of the CDG. “In addition to lowering the average cost per call for more affordable voice services, 1X Advanced also frees up channels to deliver 1xEV-DO broadband data services. Additionally, as operators consider augmenting their 3G CDMA networks with LTE and Mobile WiMAX, 1X Advanced will enable them to get more out of their existing circuit-switched voice networks for as long as needed.”
1X Advanced builds on the CDMA2000 1X technology platform, which has been providing superior voice quality and capacity for more than ten years. Operators can now transition to 1X Advanced gradually and economically, while sustaining backward compatibility. The spectral efficiency of the 3GPP2 standard has been recently enhanced with advanced voice codecs like Enhanced Variable Rate Codec-B (EVRC-B) and the use of quasi-linear interference cancellation (QLIC) techniques, which are already providing up to 50 percent higher voice capacity in today’s networks. The next step would be to move to 1X Advanced, which is a simple channel card upgrade (expected to be commercial in the second half of 2010) with new devices supporting mobile receive diversity, enabling them to more than double voice capacity immediately after the channel upgrade.
A complementary device enhancement known as simultaneous 1X Voice and EV-DO Data (SVDO) will also become available during the same timeframe and will enable CDMA2000 devices to access EV-DO packet data services while in an active 1X circuit-switch voice call. For example, users will be able to send emails or access the Web while on voice calls; phones with GPS can update maps or download real-time traffic information while on voice calls, etc. This device enhancement, which enables these concurrent voice and data services, is independent of the air link standard and infrastructure.
For more information, please visit CDMA Development Group.
About CDMA2000
CDMA2000 is a widely deployed 3G technology, with 288 operators in 103 countries and territories serving 472 million subscribers. Counting 2G cdmaOne™ subscribers, there are over 480 million CDMA users worldwide. CDMA2000 1xEV-DO is a widely-deployed 3G CDMA (IMT-2000) solution offering mobile broadband to 120 million people across a wide range of devices. CDMA2000 has been chosen by operators in both developed and emerging markets, and is deployable in the 450, 700, 800, 1700, 1900, AWS and 2100 MHz bands. More than 2,110 CDMA2000 devices from over 115 suppliers have been introduced to the market, including more than 528 Rel. 0 and 118 Rev. A devices on 107 CDMA2000 1xEV-DO Rel. 0 and 66 Rev. A systems. More information on CDMA2000 is available on the CDG Web site at CDMA Development Group.
About CDG
The CDMA Development Group is a trade association formed to foster the worldwide development, implementation and use of CDMA2000 technologies. The more than 140 member companies of the CDG include many of the world’s largest wireless carriers and equipment manufacturers. The primary activities of the CDG include development of CDMA2000 features and services, public relations, education and seminars, regulatory affairs and international support. Currently, there are more than 500 individuals working within various CDG subcommittees on CDMA2000-related matters.
# # #
Note to editors
cdmaOne is a registered trademark of the CDMA Development Group. CDMA2000 is a registered trademark of the Telecommunications Industry Association (TIA-USA). All other trademarks are the property of their respective owners.
csierra72
Well-known member
HTC Evo 4G Will Do Voice & Web Surf Over 4G Free
HTC Evo 4G Will Do Voice & Web Surf Over 4G Free
We could have some good news for those interested in the HTC Evo 4G. Our source has just informed us that his contact at Sprint has given new information on the 4G's capabilities.
According to the source, Sprint will allow VOIP calls and web surfing simultaneously via their 4G network. Furthermore, the 4G data plan would be free in the beginning for Sprint customers who opt for their 2 year contract plan when buying the phone. The reason behind this is that since 4G coverage is still not 100 percent in the US, Sprint may hold back on charging customers for a while.
Dan from Sprint also mentioned that more about the HTC Evo 4G will be revealed on 12th May. While we all got the flyers for Sprint's Prince Of Persia Evo 4G afterparty, very few us got an invite. So it looks like the Web will be hit with all the juicy bits from Sprint's launch the very next day. Do check back with us on May 13 for Sprint's full disclosure on the HTC Evo 4G.
HTC Evo 4G Will Do Voice & Web Surf Over 4G Free
We could have some good news for those interested in the HTC Evo 4G. Our source has just informed us that his contact at Sprint has given new information on the 4G's capabilities.
According to the source, Sprint will allow VOIP calls and web surfing simultaneously via their 4G network. Furthermore, the 4G data plan would be free in the beginning for Sprint customers who opt for their 2 year contract plan when buying the phone. The reason behind this is that since 4G coverage is still not 100 percent in the US, Sprint may hold back on charging customers for a while.
Dan from Sprint also mentioned that more about the HTC Evo 4G will be revealed on 12th May. While we all got the flyers for Sprint's Prince Of Persia Evo 4G afterparty, very few us got an invite. So it looks like the Web will be hit with all the juicy bits from Sprint's launch the very next day. Do check back with us on May 13 for Sprint's full disclosure on the HTC Evo 4G.
It's true. They have figured it out and we will have data/voice over 4G. Only 4G though. Not EVDO.
bdizzel1982
Well-known member
Like Phil has said many times Ozcar is not accurate and quite frankly most of the stuff he post's is just B.S. also VOIP and Voice are far different for that matter you could make a VOIP call via skype and still surf the web just fine now on a 3g network.
Yeah that article just doesn't make any sense. The EVO only uses CDMA for voice calls. Unless Sprint gets a Skype app or similar, there's no VoIP. Some day in the future of 4G all voice calls will be voice that's transparent to the user (in the way Vonage is) but that won't happen for a while.
Not true. Voice will only go over CDMA, not WiMAX. The only way the EVO may be capable of simultaneous voice and data is for voice to go over CDMA while data goes over WiMAX.
Not true. Voice will only go over CDMA, not WiMAX. The only way the EVO may be capable of simultaneous voice and data is for voice to go over CDMA while data goes over WiMAX.
The EVO can do calls over CDMA and over VOIP (they made that clear back when they first announced the phone). So it's entirely possible that they wrote some new code so that calls on a 4G network are now VOIP. Personally, though, I doubt that. The problem is that if the 4G drops out, you'd lose your call even if CDMA is available as 3G/1x. More likely, they're keeping calls as CDMA and just using the 4G radio to do data.
It should be no different than doing WiFi and a phone call at same time. WiFi/WiMAX are separate radios from CDMA. Not sure why this would be an issue since it works with WiFi.
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