Patrick Leary, Telrad 727-501-3735
Dan, your understanding is exactly correct. The same setting existed in WiMAX. The general name for these are "fairness" algorithms. Equal rate is okay when the sector is under-loaded. It will add time slots for edge users to guarantee them equal capacity. As loading increases, one really has 2 options: add capacity (another base station) or switch to equal time, which as you note will lower capacity of edge users, but keep close in users running higher. In any rate, these were algorithms added to technologies designed for long outdoor connections. Wi-Fi-based systems are hampered because the design intent is to serve close together WLAN users, so there is no need to engineer around the near/far problem experienced when making Wi-Fi do what it is inherently not intended to do. - Patrick Telrad > On Nov 12, 2015, at 4:51 PM, Dan Petermann <[email protected]> wrote: > > LTE can be set for equal time or equal rate. Equal rate will drag down > the thruput of all users. > > Equal time will only impact the user with a poor signal. If everyones signal is great and one users radio signal is bad, that user only gets the thruput that can be crammed into his timeslot because his modulation is low. Everyone else continues as normal. > > At least that is my understanding. > > >> On Nov 12, 2015, at 3:01 PM, Adam Moffett <[email protected]> wrote: >> >> ....any system with 20mhz channels + two chains + 256QAM can claim 100mbps. >> Getting past that is going to be carrier aggregation (bigger >> channels) and MU-MIMO. >> >> 5x20mhz channels aggregated = 500mbps. >> >> MU-MIMO can theoretically double capacity. So there's your 1gig. >> I'm not clear on how far you can count on MU-MIMO. In theory it >> sounds promising. >> >> ....and yes, one person at MIMO-A QPSK is going eat up many times the capacity of a person at 256QAM MIMO-B no matter what wireless system you're using. The best defense against that will be don't install bad connections. Nothing new there. >> >> If you're going to use 100mhz, you could of course install 5 AP's of >> your choice and claim you have a 500mbps system. >> >>> On 11/12/2015 4:47 PM, Matt wrote: >>> Hear talk of these 50 - 100+ mbps speeds per user and eventually 1 >>> gbps. How can LTE do that in 10 to 20 mhz of spectrum? I assume if >>> you are offering 50 mbps package in a sector its safe to assume at >>> prime time there are going to be at the very least 10 people using >>> it in that sector at the same time? Also assume some have less then >>> perfect connections to the tower using more air time. > ************************************************************************************ This footnote confirms that this email message has been scanned by PineApp Mail-SeCure for the presence of malicious code, vandals & computer viruses. ************************************************************************************ ************************************************************************************ This footnote confirms that this email message has been scanned by PineApp Mail-SeCure for the presence of malicious code, vandals & computer viruses. ************************************************************************************
