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>UL Frame Generator at the eNodeB• Very similar to the DL frame generator• Called in the same 3 phases• Uses the same scheduler <strong>and</strong> callback functions• Does not deal with RLC, since it is the UE’s job• Only creates grants, <strong>and</strong> underst<strong>and</strong>s how many bits could fill the spaceallocated in a grant – The eNodeB knows the UE’s needs from BSRs• Conditionally reuses some grants created by the DL Frame Generator forHARQ acknowledgment purposes• In case the scheduler does not choose such UEs, the UL frame generator isaware that 1 allocation block would eventually be given to the above UE.• Does not use the space allocated to the control channels, such as PUCCH <strong>and</strong>RACH• Function: lte_enb_as_ul_frame_generate()CONFIDENTIAL ─ 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.52
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