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hi Vinodh I guess you are talking about Test Case 9.2.1.1.2 in 36.523. There is no conflict between 36.523 and 23.401. As specified in 3GPP 24.301, UE identity in Paging message can be either S-TMSI or IMSI. Paging with IMSI is an abnormal procedure , and it is used for Error Recovery. The network may...
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Hi Garv 1. ZC Sequency is not SC-FDMA modulated. 2. For FDD, maximum 1 RACH is supported in one subframe, Subcarrier Spacing for RACH is 1.25 KHZ as you know, thus, 864 *1.25/15 =72 normal Sub Carrier= 6 RB, it makes 100 RBs in Total. The Resources for RACH is reserved , and no PUSCH can be transmitted...
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Hi Janardhan DCI format 1A and 1C , normally scrambled by P-RNTI,SI-RNTI,RA-RNTI (DCI format 1A also can be scrambled by C-RNTI in case CFRA procedure) For DCI format 1C , there is a special TBS table in which can be found in 3GPP 36.213, the max TBS is 1736 bits For DCI format 1A, if It's scrambled...
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Hi C-RNTI MAC Control Element should always be except the transmission is made for CCCH. When UE tries to attach to the system , the First C-RNTI MAC Control Element sent by UE is in MSG4, RRCConnectionSetupComplete. BRs//Lei.
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Hi Vinodh I think the reason that the range of systeminforvaluetag from 0 to 31 is because of DRX. In RRC-Connected mode, the maximum long DRX cycle in is 2560 ms Also in RRC-Idle mode, the maximum DRX cycle (refer to defaultpagingcycle) is 2560 ms. And the period of SIB1 is 80 ms. That's why we...
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Hi Experts, Can anyone please explain me what is the reason LTE has to use viurtal resource block? My understanding from 36.211 is VRB is the same size as PRB. There are 2 types of VRBs (localized and distrbuted). Why can we just use physical resource blocks? Thanks, Qi
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One of the key goals of LTE systems is to improve the end-user experience while keeping the overall cost low for the service provider. One way to achieve this goal is to improve the spectral efficiency of the system. The use of multiple antenna techniques allows us to improve the efficiency and performance...
Posted to
Neerav Dalal
by
ndalal
on 02-24-2010
Filed under: lte, MIMO, cell capacity, multiple antenna techniques, peak data rate
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You may hear it many times that the peak data rate of LTE is about 300Mbps? How is the number calculated? What are the assumptions behind? Let's estimate it in a simple way. Assume 20 MHz channel bandwidth, normal CP, 4x4 MIMO. First, calculate the number of resource elements (RE) in a subframe with...
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Hello gents, According TS 36.306 Table 4.1-3, Total layer 2 buffer size for UE CAT 3 is 1 400 000 Bytes. This buffer size is used for storing RLC TX Windows/ RLC RX Windows & Reordering for all radio bearer (TS 36.306 § 4.2.5). When I compute the max RLC AM_Window_Size in bits for a mobile CAT3...
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Since the website face-lift a year ago, 3GPP is actively involved in more than just producing Technical Specs and Reports. I regularly read the 3GPP News column and the latest one from Nov. 4 th has the conspicuous title “Dispelling LTE Myths” . I wonder if these so called Myths are the product...
Posted to
Hooman Razani
by
Hooman Razani
on 11-23-2009
Filed under: 3gpp, lte, Emergency call, SMS, SRVCC, VoIP, RCS, Voice, Myths, SGs, IMS
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After all, we are just trying to transport a simple Ethernet frame from the base station (BTS, NodeB, eNB) to the base station controller (BTS, RNC, S-GW, ASN-GW). As the cellular industry moves toward "all IP networks", they are laying the groundwork for an effective unified backhaul solution...
Posted to
Articles
by
bbest
on 10-08-2009
Filed under: lte, ethernet, 4G, backhaul, cellular, rube goldberg machine, cet, metro ethernet, all IP networks, carrier ethernet
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After all, we are just trying to transport a simple Ethernet frame from the base station (BTS, NodeB, eNB) to the base station controller (BTS, RNC, S-GW, ASN-GW). As the cellular industry moves toward "all IP networks", they are laying the groundwork for an effective unified backhaul solution...
Posted to
Bob Best
by
bbest
on 10-08-2009
Filed under: ethernet, lte, 4G, backhaul, cet, metro ethernet, cellular, rube goldberg machine, all IP networks, carrier ethernet
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Agilent Technologies Inc. has partnered with China's Southeast University for R&D on 3GPP-LTE systems performance. The company is providing test instruments and funding for researching ways to obtain higher data rates and high-quality services with increased spectrum and power efficiency. Mike...
Posted to
LTE News
by
Award News
on 07-31-2009
Filed under: lte, agilent, china university
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Huawei announced today the opening of a Long Term Evolution (LTE) laboratory in Richardson, Texas. Initially established with prototype equipment in fall 2008, the facility has been upgraded to support commercial product releases for North America. The lab recently implemented Huawei’s first commercial...
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Telecom equipment provider ZTE Corp. (0763.HK, 000063.SZ) expects to build more than 60,000 BBU+RRU (Baseband Unit + Remote Radio) base stations to support 2G, 3G and 4G networks in India by the end of fiscal 2010, C114.net reported July 28 citing foreign media reports. ZTE plans to recruit 1,000 new...
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cdma2000™ Leading the Industry with Innovation CDMA has continuously led the industry in innovation since the late 1980s. Today, cdma2000™ is an accepted standard for 3Gnetworks. However there was a time when the concept of basing an air interface on code-division, rather than traditional...
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On December 12, 2008, Alcatel-Lucent announced its strategic plan to enable service providers, enterprises and end-users to take greater advantage and gain more value out of todays web environment as well as its next evolution.
Posted to
LTE Videos
by
Award News
on 12-17-2008
Filed under: lte, video, alcatel-lucent, equipment, ceo
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Application Note This application note describes the Long Term Evolution (LTE) of the universal mobile telecommunication system (UMTS), which is being developed by the 3rd Generation Partnership Project (3GPP). Particular attention is given to LTE’s use of multiple antenna techniques and to a new...
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Ericsson developed film promoting mobile broadband benefits for society for individuals, enterprises and governments. Global UN meeting uses video conferencing (telepresence) and secure file transfer over a high performance Fiber (fixed broadband) connection.
Posted to
LTE Videos
by
Award News
on 12-03-2008
Filed under: lte, video, mobile broadband, ericsson
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Dr. Erik Dahlman Expert Radio Access Technologies Ericsson Research
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A White Paper from the UMTS Forum Towards Global Mobile Broadband Standardising the future of mobile communications with LTE (Long Term Evolution) February 2008