1. http://www.sharetechnote.com/html/Handbook_LTE.html2. http://4g-portal.com/3. http://howltestuffworks.blogspot.kr/4. http://www.netmanias.com/5. http://lteinwireless.blogspot.kr/6. http://www.simpletechpost.com/

http://www.sharetechnote.com/html/Handbook_LTE_DRX.html Even while there is no traffic between the network and UE, UE has to keep listening to Network. At least it should be ready to decode PDCCH. It means UE has to be "ON" all the time even when there is no traffic. But being ON all the time would drain the battery.You may ask "Then why don't UE shut down (getting into a sleep mode) when there ..

http://know-lte.blogspot.kr/2016/07/cdrx-connected-mode-drx.html Connected Mode DRX (CDRX)In addition to Idle mode DRX, LTE had RRC mode DRX as well also known as Connected Mode DRX (CDRX), the purpose of both the DRX is same to conserve the battery power. During RRC connected state when there is no data transmission in either direction (UL/DL) UE goes into the DRX mode. It starts monitoring the..

EPS mobility management messagesMessage typeDirectionMessageReference0x4266to UEAttach accept8.2.10x4367to NetworkAttach complete8.2.20x4468to UEAttach reject8.2.30x4165to NetworkAttach request8.2.40x5c92to NetworkAuthentication failure8.2.50x5484to UEAuthentication reject8.2.60x5282to UEAuthentication request8.2.70x5383to NetworkAuthentication response8.2.80x64100to UECS Service notification8.2..

LTE Attach Procedure http://www.lteandbeyond.com/2012/01/lte-attach-procedure.html LTE Detach procedure http://howltestuffworks.blogspot.in/2011/12/detach-request-ue-initiated.html http://howltestuffworks.blogspot.in/2011/12/detach-request-network-initiated.html UMTS/GPRS Attach/Detach http://riazdaguru.files.wordpress.com/2007/08/gprs-attach_detach.pdf (nice and crisp)

In an emergency situation, like Earthquake or Tsunami, degradation of quality of service may be experienced. Degradation in service availability and performance can be accepted in such situations, but mechanisms are desirable to minimize such degradation and maximize the efficiency of the remaining resources. When Domain Specific Access Control (DSAC) mechanism was introduced for UMTS, the origi..