AS201281 Wiki - studies:re56

anonymous@undisclosed.example.com (Anonymous) — Mon, 04 Jan 2021 20:41:02 +0000

The base station permanently but not continuously receives data (bits stored in a queue). Each bit (fifo) is stored in a buffer when this buffer has free space. This buffer may be either a simple array, in this case each bit has to be “tagged” as belonging to a given user, or several arrays each belonging to one user. Let's take one array per user. Those datas are then available to the

Max-CQI scheduler

anonymous@undisclosed.example.com (Anonymous) — Mon, 04 Jan 2021 20:41:02 +0000

Max-CQI scheduler user = { CQI, RBG } data = { UE_ID } rbg = { RB[] } data[] buffer data[] ue_data rbg [] blocks user[] users user get_ue_max_cqi () ue = users[0] for i in users do if ue.CQI < i.CQI then ue = i fi done end while is_there_free_ressources_block_group do ue = get_ue_max_cqi () if buffer.has_data_for ( ue ) not null rbg = get_free_ressources_block_group () ue.RBG.add ( rbg ) fi done for ue in users do for b in nb_bits_per_sequence do …

anonymous@undisclosed.example.com (Anonymous) — Mon, 04 Jan 2021 20:41:02 +0000

Proportional fair This scheduler algorithm is a mix between the 2 previous algorithms : round-robin & max-CQI. It combines the equity principle of round-robin and the throughput optimization principle of max-CQI. Proportional fair allocates resources to the UE which maximize the metric following :

anonymous@undisclosed.example.com (Anonymous) — Mon, 04 Jan 2021 20:41:02 +0000

DATA { INT ind_user; } RGB { RB rbs[] } USER { RGB rgbs[]; DATA datas_to_transmit[]; } # in the case of a lonely array as a buffer DATA buffer[] # previously initialized # and continuously filled by the incoming datas RGB all_rgbs[] DATA u_data[nb_bits_per_sequence] USER users[] INT nb_bits_per_sequence # scheduler size FOR u IN users DO #FOR i in nb_bits_per_sequence DO # u_data[i] = buffer.get_bit(u) #ENDFOR u_data[0] = buffer.get_bit(u) IF u_data.[0] IS NOT None u.rgbs += GET…

anonymous@undisclosed.example.com (Anonymous) — Mon, 04 Jan 2021 20:41:02 +0000

1. PURPOSE OF THE SYSTEM FUNCTION (10 lines) The purpose of our system function is to simulate the sub-carriers allocation for packets transmission in the case of LTE communication. The system will focus on ressources allocation scheduling in the case of downlink communications. Several parts will be implemented: