728x90 Mobile163 LTE Information Site 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/ 2016. 12. 30. LTE : DRX (Discontinuous Reception) - CDRX (Connected Mode DRX) 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 .. 2016. 12. 30. LTE: CDRX - Connected Mode DRX 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.. 2016. 12. 30. LTE Non Access Stratum protocol for Evolved Packet System (EPS) 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.. 2016. 6. 22. [SIM/USIM/ICC] Response APDU structure Contents of Response APDU CodeLengthDescriptionM/ODataLrResponse data stringOptionalSW11Status byte 1MandatorySW21Status byte 2Mandatory SW1, SW2를 Status Word라 부르며, 다음과 같은 응답값을 가진다. Normal processing SW1SW2Description 9000- Normal ending of the command91XX- Normal ending of the command, with extra information from the proactive UICC containing a command for the terminal. Length 'XX' of the respo.. 2016. 4. 14. UMTS Attach Procedure / UMTS Detach Procedure http://victor8481.tistory.com/608 2015. 12. 7. LTE Attach Procedure / LTE Detach Procedure 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) 2015. 12. 7. Service Specific Access Control (SSAC) in 3GPP Release 9 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.. 2015. 9. 8. Cell Update Procedure and Causes to occur Cell Update in UMTS Uplink data transmission:For FDD, if the variable H_RNTI is not set, and for TDD:if the UE is in URA_PCH or CELL_PCH state; and UE has uplink RLC data PDU or uplink RLC control PDU on RB1 or upwards to transmit: perform cell update using the cause *"uplink data transmission"*. Paging response:if the criteria for performing cell update with the cause specified above. are not met; and if the UE in.. 2015. 6. 5. 3GPP LTE Frequency Bands (LTE FDD / LTE TDD) LTE BandUplink Operating BandDownlink Operating BandDuplex ModeF(UL) Low – F(UL) HighF(DL) Low – F(DL) High11920 MHz – 1980 MHz2110 MHz – 2170 MHzFDD21850 MHz – 1910 MHz1930 MHz – 1990 MHzFDD31710 MHz – 1785 MHz1805 MHz – 1880 MHzFDD41710 MHz – 1755 MHz2110 MHz – 2155 MHzFDD5824 MHz – 849 MHz869 MHz – 894 MHzFDD6830 MHz – 840 MHz875 MHz – 885 MHzFDD72500 MHz – 2570 MHz2620 MHz – 2690 MHzFDD8880 .. 2015. 4. 27. 3GPP releases summary Release 8 - LTE Introduced Release frozen in Dec 2008 It was 3GPP release 8 when LTE was introduced for the very first time. All the releases following only enhanced the technology. Based on release 8 standardization, following were the main achievementsHigh peak data rates : Up to 300 Mbps in downlink and 75 Mbps in uplink when using 4x4 MIMO and 20 MHz bandwidth, High spectral efficiency Flexi.. 2015. 4. 27. Best Chinese 2015 MediaTek Android smartphones MediaTek is a fabless chip maker from China that has quickly grown to become one of the largest providers of silicon for the booming Asian phone industry, but with a confusing naming scheme, it's hard to make sense of the countless chips that MediaTek is offering. With more and more first-tier smartphone makers like HTC and Sony adopting MediaTek chips in their phones, it's worth keeping tabs on.. 2015. 4. 24. 이전 1 2 3 4 5 6 7 ··· 14 다음 728x90
