Jump to content

How are the handoffs (between frequencies) supposed to work?


Recommended Posts

Hey guys,

 

Long time lurker, first time poster.

 

I have a question about how the phones will handle the handoffs between the 800, 1900, and 2500 bands. Currently, the switch to 4G to 3G or 3G to 4G is anything but seamless. Websites and media stop loading during the handoffs. When NV is fully implemented, do we expect the phones to have stability between the frequencies?

Link to comment
Share on other sites

good question. I think between 800 and 1900 it should be. not sure about 2500 as it will probably generate different ip unless if it is 2500 hosted by sprint itself.I know there are chips which do seamless switch between FD and TD but in our scope TD is hosted by different company(subsidiary of sprint)

Link to comment
Share on other sites

eHRPD exists for CDMA to LTE hand-off, WiMax to EvDO is impossible because no hand-off technologies exist. 3G to WiMax and WiMax to 3G hand-off probably doesn't have a hand-off method/technology to my knowledge. 3G is ran by Sprint and WiMax is ran by Clearwire, there's latency and involved that could possibly cause problems. LTE should be able to handle hand-off from carrier to carrier without issue regardless of frequency.

Link to comment
Share on other sites

good question. I think between 800 and 1900 it should be. not sure about 2500 as it will probably generate different ip unless if it is 2500 hosted by sprint itself.I know there are chips which do seamless switch between FD and TD but in our scope TD is hosted by different company(subsidiary of sprint)

 

I've heard it both ways. A few on this forum have said it can't be done because of the different gateways/networks/etc.

 

However, the guys over at clearwire have said that it will be a "seemless" handoff (they've even said they will support VoLTE).

 

Personally, I am very interested how this is going to roll out.

Link to comment
Share on other sites

I've heard it both ways. A few on this forum have said it can't be done because of the different gateways/networks/etc.

 

However, the guys over at clearwire have said that it will be a "seemless" handoff (they've even said they will support VoLTE).

 

Personally, I am very interested how this is going to roll out.

if it is seamless

I dont know if TD works good while on the move..if it does not then there should be option to toggle switch on and off 2500.

Link to comment
Share on other sites

if it is seamless

I dont know if TD works good while on the move..if it does not then there should be option to toggle switch on and off 2500.

 

TDD works fine while moving. In the Sprint/Clearwire program documents for system planning between their FD-LTE and Clearwire's TD-LTE, the systems are being coordinated to handoff to each other while in motion. How successful it will work remains to be seen, but they are planning for it.

 

Robert via Kindle Fire using Forum Runner

  • Like 1
Link to comment
Share on other sites

While handoffs work much better when both share the same network, it can be made to work between completely different networks. The device must be registered on both networks. In this case, most of the device handoff logic resides on the device itself. CDMA 1x and EVDO have the capability, but the CDMA vendors have chosen not to implement it.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

  • large.unreadcontent.png.6ef00db54e758d06

  • gallery_1_23_9202.png

  • Posts

    • ...and I just this morning realized you meant Cumberland, MD.  It threw me because there's an Ashby in Cumberland County, VA, which I'm far more familiar with. - Trip
    • I don't have anything solid to offer on Cumberland, but I came down US-15 today and the water tower site in Weber City is now up and running with B2/12/4/71 (035ACCxx), I believe I saw new T-Mobile antennas on the tower at Sprouses Corner which I will try to confirm on Saturday (definitely not running if they're there), and I believe I may have connected to something that got converted in Farmville.  By process of elimination, my guess is Lancer Park, but I hope to find out tomorrow or Saturday. So upgrades are clearly coming.  You may want to see if your local government officials can tell you anything.  Probably not, but can't hurt to ask. - Trip
    • Interesting twist.  Today, I took off for southern Virginia and had my T-Mobile B71 phone (Revvlry on Android 10) and I noticed the GPS was bad as compared to my other two devices on SCP on the dash.  Couldn't get it to clear by toggling the Location Services box, so I quit and restarted SCP. When I did so, it first came up with the bad coordinates, then extremely rapidly zipped through from where it was stuck all the way up to where I was currently, like the coordinates were backlogged and then suddenly flushed out within a few short seconds.  More bizarrely, I noticed the same behavior on two other devices (Pixel 3a and Moto One 5G Ace, both on Android 11) and had to do the same thing to those.  I also dumped my trails on all three, assuming they were all bad by then.  The rest of my devices were correct. I was barreling down the highway at the time, so I couldn't investigate further.  Other than my quoted message above, I've never seen this behavior before, and now it seems to be widespread.  - Trip
    • Does anyone have any updates to the Cumberland/Mineral County area? Specifically looking to get TMHI in Ft. Ashby.
    • Actually, you are correct. It is possible Dish won't take it. Meanwhile both Dish and T-Mobile pretend they don't want it for negotiation purposes.
  • Recently Browsing

    • No registered users viewing this page.
×
×
  • Create New...