5 Advanced Modelling Components for IMT-2020 Channel Model This section describes the detailed realization of advanced features given in § 2 of this Annex. The procedure of each advanced modeling components is added after each step of main procedure as substeps. Since each advanced modelling component is related to several steps of the main procedure, the correspondence main steps modified for each of the advanced modelling components are listed in Table A1-24. The use of the following advanced modeling components is optional and up to the proponents to decide. TABLE A1-24 A summary of advanced modelling components Corresponding Subsection Advanced modelling steps in main Recommended condition Number component procedure 5.1 Oxygen absorption Step 11 From 52 to 68 GHz 5.2.1 Large bandwidth and Step 11 When the bandwidth B is greater than c/D Hz, large antenna array where – Modelling of  D is the maximum antenna aperture in either propagation delay azimuth or elevation (m)  c is the speed of light (m/s) 5.2.2 bandwidth and Step 7 When inverse of bandwidth is smaller than the large antenna delay spread or angular resolution of the Modeling of antenna array is better than per-cluster anglular angular and spread. delay spread 5.3.1 Spatial consistency Steps 5-11 To ensure that the channel evolves smoothly procedure without discontinuities which can be important when evaluating the system performance, including 5.3.2 Spatial consistent UT 5, 6, 7 beam tracking or Multi-user MIMO (MU-MIMO) mobility modeling performance etc. 5.3.3 Spatial consistent Steps 2-12 LOS/NLOS, indoor states and O-I parameters 5.4 Blockage Step between 9 When the transmitter and receiver are blocked by and 10 the stationary or moving objects, especially for the higher frequency bands. 5.5 of Step 1, 2, 4, 5, For simulations in multiple frequency band correlation of 6, 7, 8-11 simultaneously. large scale parameters 5.6 Time-varying Doppler Step 11 For nonlinear UT movement or when direction of frequencies arrival is time-varying, such as when using the feature in 5.3. 5.7 UT rotation Step 1 For simulation that UT rotation is considered. 5.8 Ground reflection Step 11 To increase the model accuracy in LOS conditions, especially in higher frequency band. 5.9 Random cluster number Steps 5, 7 To better capture the cluster characteristics of the channel.
5 Advanced Modelling Components for IMT-2020 Channel Model This section describes the detailed realization of advanced features given in § 2 of this Annex. The procedure of each advanced modeling components is added after each step of main procedure as substeps. Since each advanced modelling component is related to several steps of the main procedure, the correspondence main steps modified for each of the advanced modelling components are listed in Table A1-24. The use of the following advanced modeling components is optional and up to the proponents to decide. TABLE A1-24 A summary of advanced modelling components Subsection Number Advanced modelling component Corresponding steps in main procedure Recommended condition 5.1 Oxygen absorption Step 11 From 52 to 68 GHz 5.2.1 Large bandwidth and large antenna array – Modelling of propagation delay Step 11 When the bandwidth B is greater than c/D Hz, where  D is the maximum antenna aperture in either azimuth or elevation (m)  c is the speed of light (m/s) 5.2.2 bandwidth and large antenna of angular and delay spread Step 7 When inverse of bandwidth is smaller than the delay spread or angular resolution of the antenna array is better than per-cluster anglular spread. 5.3.1 Spatial consistency procedure Steps 5-11 To ensure that the channel evolves smoothly without discontinuities which can be important when evaluating the system performance, including beam tracking or Multi-user MIMO (MU-MIMO) performance etc. 5.3.2 Spatial consistent UT mobility modeling 5, 6, 7 5.3.3 Spatial consistent LOS/NLOS, indoor states and O-I parameters Steps 2-12 5.4 Blockage Step between 9 and 10 When the transmitter and receiver are blocked by the stationary or moving objects, especially for the higher frequency bands. 5.5 Modeling of correlation of large scale parameters Step 1, 2, 4, 5, 6, 7, 8-11 For simulations in multiple frequency band simultaneously. 5.6 Time-varying Doppler frequencies Step 11 For nonlinear UT movement or when direction of arrival is time-varying, such as when using the feature in 5.3. 5.7 UT rotation Step 1 For simulation that UT rotation is considered. 5.8 Ground reflection Step 11 To increase the model accuracy in LOS conditions, especially in higher frequency band. 5.9 Random cluster number Steps 5, 7 To better capture the cluster characteristics of the channel.
R-REP-M.2412-2017-MSW-E.docx