Understanding LTE Model Internals and Interfaces
Understanding LTE Model Internals and Interfaces
Understanding LTE Model Internals and Interfaces
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1581 <strong>Underst<strong>and</strong>ing</strong> <strong>LTE</strong> <strong>Model</strong> <strong>Internals</strong> <strong>and</strong> <strong>Interfaces</strong><strong>LTE</strong> Channel Capacity• Capacity depends upon:• Modulation <strong>and</strong> coding index (MCS) – the higher the MCS index, the more the capacity• Number of free resource elements per transport block – for the downlink, this number can vary ineach subframe• The st<strong>and</strong>ard (36.213) provides a table (7.1.7.2.1-1) of mapping between number of RBs<strong>and</strong> capacity in bits using 120 resource elements per block (REs) as a baseline• A Downlink channel with 2 transmitters <strong>and</strong> 3 columns taken by the PDCCH would have 120 REsper block• If the REs of a block are different, the bit carrying capacity is scaled proportionally• At the end of the simulation, for each eNodeB, a table is created to give you an estimate ofthe channel capacity• A capacity estimate used by the admission control module is also given separatelyCONFIDENTIAL ─ RESTRICTED ACCESS: This information may not be disclosed, copied, or transmitted in any format without the prior written consent of OPNET Technologies, Inc. © 2010 OPNET Technologies, Inc.30
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