Jump to content

SMR vs cellular vs PCS vs AWS


dedub

Recommended Posts

I don't think I've ever seen anyone explain exactly what those mean or what the differences in those labels are for.

 

I know they refer to (or are related to) the bands 800, 850, 1900 and 2100/1700, but why aren't they all simply called cellular instead of SMR, or PCS or AWS etc?

Link to comment
Share on other sites

I don't think I've ever seen anyone explain exactly what those mean or what the differences in those labels are for.

 

I know they refer to (or are related to) the bands 800, 850, 1900 and 2100/1700, but why aren't they all simply called cellular instead of SMR, or PCS or AWS etc?

 

They are acronyms...

 

SMR = Specialized Mobile Radio

PCS = Personal Communications Service

AWS = Advanced Wireless Service

  • Like 2
Link to comment
Share on other sites

So essentially, they are different communication protocols that are used at a particular bands, much like http vs ftp vs tftp etc.

Link to comment
Share on other sites

So essentially, they are different communication protocols that are used at a particular bands, much like http vs ftp vs tftp etc.

 

I wouldn't say that. CDMA 1X is used across Cellular, SMR, PCS. LTE is being used across 700mhz, eventually Cellular I'd surmise, SMR, PCS, AWS. When the bands got auctioned off they got a moniker for a frequency range.

Link to comment
Share on other sites

So essentially, they are different communication protocols that are used at a particular bands, much like http vs ftp vs tftp etc.

 

 

They don't specify the protocol at all.They are just names given to bands(grouped segments) of spectrum.

  • Like 1
Link to comment
Share on other sites

So essentially, they are different communication protocols that are used at a particular bands, much like http vs ftp vs tftp etc.

 

Kinda, kinda not. Like you example, any service CDMA/GSM/LTE/EDGE/WCDMA/etc can be run over any of the RF Spectrum, they are basically buzz words that describe a spectrum band. They don't define what can or can't be used in the spectrum.

  • Like 1
Link to comment
Share on other sites

I don't think I've ever seen anyone explain exactly what those mean or what the differences in those labels are for.

 

I know they refer to (or are related to) the bands 800, 850, 1900 and 2100/1700, but why aren't they all simply called cellular instead of SMR, or PCS or AWS etc?

 

For people in the industry, it just helps describe the bands in conversation. 800mhz has traditionally been known as Cellular, 1900mhz was known as PCS (hence Sprint PCS), 850mhz was SMR (even though the range is actually much wider and narrower than 850), and 2100/1700mhz, or AWS.

 

When I am speaking to people here, it helps instead of speaking in frequencies :).

  • Like 2
Link to comment
Share on other sites

I don't think I've ever seen anyone explain exactly what those mean or what the differences in those labels are for.

 

I know they refer to (or are related to) the bands 800, 850, 1900 and 2100/1700, but why aren't they all simply called cellular instead of SMR, or PCS or AWS etc?

 

The names are for their original intended purpose but to be true to their current use they would all be called AWS or Advanced Wireless Services bands.

 

Cellular 850 was licensed for the original analogue AMPS cellular network but is now used for 3G and 2G all-digital services and can be used for 4G.

 

PCS (Personal Communication Services) 1900 was licensed to add capacity for cellular carriers that needed more spectrum and for new competitors to offer wireless services. It is used for all-digital 2G, 3G and 4G services today.

 

SMR (Specialized Mobile Radio) 800 was licensed to be used with two-way radios in commercial application but could also be used for cellular service. Originally it could only be used with small channels (like two-way radios used) but the FCC ammended the rules to allow wide-band operations. Effectively this rule change made SMR into an Advanced Wireless Services band in that it now supports wide-band operations like 3G and 4G.

 

AWS-1 (Advanced Wireless Services) (1700 Mhz uplink / 2100 downlink) - This band was specifically made for mobile broadband (3G, and 4G).

  • Like 3
Link to comment
Share on other sites

What is different about aws 1, that the ul and dl are on different bands?

 

The 1700 MHz uplink and 2100 MHz downlink are not different bands. They are paired together to form one FDD band. A band is any defined set of spectrum.

 

AJ

Link to comment
Share on other sites

 

 

The 1700 MHz uplink and 2100 MHz downlink are not different bands. They are paired together to form one FDD band. A band is any defined set of spectrum.

 

AJ

 

Thanx for the clarification. Then to rephrase, what makes that the 2 are paired together? If used as in a TDD, would pairing no longer be needed?

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.

  • large.unreadcontent.png.6ef00db54e758d06

  • gallery_1_23_9202.png

  • Posts

    • The S21U was very spotty with connecting to 6E. It would only see it on a router reboot. I thought it was more the router than the S21U, however my laptop would solidly connect to the 6E network, so it must have been the S21U. Since I'm on WiFi7 with the S24U, I haven't kept track of it. I will flip over and check it out later. 
    • Wi-fi 6e missing (6 GHz on one of two ultras). Perhaps coming from an app?  Wifi analyzer can see the 6ghz, just can't see them to connect.  May try wifi reset, although communications reset could have been the source of this problem.  Others have reported it, so not an isolated issue. Edit: Fixed: Rebooted into safe mode. Wifi 6e worked. Normal boot back. No wifi 6e in available nerworks.  Unistalled Asus Router app. Checked for Wifi 6e being visible in wifi available networks. Nothing. Deleted Netgear Genie app. Then saw networks. of mine I had not connected to in wifi available networks. Forgot the desired 2.4&5&6 SSID that did not show 6E. Connected to it again. 6e now works.
    • I noticed today while I was out and about in Louisville that b30 has been widened back to 10x10. They reduced it to 5x5 back in Sept 2018 presumably due to satellite radio interference. Not sure how long ago the change happened but it couldn't have been too terribly long ago. I noticed the different earfcn in the neighbor list, I don't usually see b30 as pcc much but I wonder if that will change now. I locked my phone to b30 only on my drive home from work and noticed the new(old?) earfcn on every site, so it wasn't just a 1 or 2 site fluke. It also looks like they've been doing some fiber or other cabling work around the b2/b46 small cell nodes, I wonder if they are about to start adding c-band radios to those. 
    • Should trade it for some low-band there or elsewhere. AT&T dominates lowband.    
    • I checked existing spectrum holdings and selling 5x5 PCS to each of VZW and AT&T in Kauai would get them to 20x20 apiece there, which should make them happy. In Maui it makes more sense to sell 5x5 each of PCS and AWS to get VZW 20x20 AWS and AT&T 15x15 PCS. I figure it would be a sale rather than a swap, as neither of the other two have spectrum T-Mobile would want that's high-frequency enough to avoid the spectrum screen. Honestly, T-Mobile is strong enough in Hawaii from a capacity perspective that cutting down PCS/AWS holdings won't hurt, particularly in exchange for finally unlocking 2.5 (though in Maui I saw 140 MHz n41 regularly in September if I remember correctly).
  • Recently Browsing

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