B.8 Burst transmission models for Frame structure type 3

36.1013GPPEvolved Universal Terrestrial Radio Access (E-UTRA)Release 18TSUser Equipment (UE) radio transmission and reception

This clause provides a description for burst transmission models for Frame structure type 3.

B.8.1 Burst transmission model for one LAA SCell

One burst is defined as downlink transmissions which occupy one or more consecutive subframes. The burst transmission format is determined according to the steps below:

1) Select the number of subframes randomly from a given set of the number of subframes with equal probability as the total length of burst transmission format. The length includes both occupied OFDM symbols and non-occupied OFDM symbols within the burst format. is given per test case.

2) If is equal to 1, the subframe is set as fully occupied, otherwise:

– For demodulation test, the starting position for the first subframe is randomly selected from OFDM symbol 0 and OFDM symbol 7 with equal probability. For CSI test, the starting position for the first subframe is OFDM symbol 0.

– The configuration of occupied OFDM symbols in the last subframe is randomly selected from configuration set . is given per test case.

A uniform random variable from [0, 1] is generated. If the random variable is less than p which is given per test case,

– If both the last subframe of previous burst and first subframe of new burst format are fully occupied, start burst transmission after deferring one subframe from the last subframe of previous burst. Otherwise, start burst transmission at the end of last subframe of previous burst.

Otherwise, the burst transmission is muted and the muting duration is the same as the number of subframes for determined burst format.

B.8.2 Burst transmission model for multiple LAA SCell(s)

This clause provides a description for burst transmission models for Frame structure type 3 when there are multiple LAA Scell(s) in the test.

One burst is defined as downlink transmissions which occupy one or more consecutive subframes. Assuming M carriers are configured, the burst transmission format is determined according to the steps below:

1) For each carrier c_m (m=0,⋯, M-1), select the number of subframes N_m randomly from a given set of the number of subframes S₁ with equal probability as the total length of burst transmission format used for carrier c_m. The length includes both occupied OFDM symbols and non-occupied OFDM symbols within the burst format. S₁ is given per test case.

2) If any N_m is equal to 1, the first subframe is set as fully occupied for all carriers, otherwise:

– For demodulation test, the starting position for the first subframe is randomly selected from OFDM symbol 0 and OFDM symbol 7 with equal probability. For CSI test, the starting position for the first subframe is OFDM symbol 0. The starting position is common for all carriers.

– The configuration of occupied OFDM symbols in the last subframe is randomly selected from configuration set S₂ for each carrier c_m. S₂ is given per test case.

A uniform random variable p_m from [0, 1] is generated for each carrier c_m to determine whether the burst is transmitted or not on each carrier.

For each carrier c_m, if p_m is less than p which is given per test case,

– If both the last subframe of previous longest transmitted burst over M carriers and first subframe of new burst format are fully occupied, start burst transmission according to the determined burst transmission format for this carrier after deferring one subframe from the last subframe of previous longest transmitted burst. Otherwise, start burst transmission for this carrier at the end of last subframe of previous longest transmitted burst

Otherwise, the burst transmission is muted and the muting duration is N_max and N_max is the maximum of N_j wherein j∈{0,1,⋯,M-1} and p_j is less than p.

Annex C (normative):
Downlink Physical Channels