B.1 Data transfer when no uplink feedback channel is established

3GPP43.246Multimedia Broadcast/Multicast Service (MBMS) in the GERANRelease 17Stage 2TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

B.1.1 PBCCH not deployed, transmission with frequency hopping

Figure B.1

Figure B.1 shows that it is possible to have the simultaneous reception of paging or broadcast channel and MBMS data if MBMS sessions are received on up to 4 timeslots.

NOTE: In this scenario, it would be possible to receive multiple MBMS sessions on up to 5 timeslots, still meeting the requirement of T_ra = 1; however, this exceeds the required multislot capabilities of an MBMS capable mobile station.

It is assumed that channel combination iv (BCCH+CCCH+FCCH+SCH) is allocated on TN 0 of the BCCH carrier. If the CCCH is located on other timeslots in addition to timeslot 0, the number of timeslots that MBMS can be received on is reduced. For example, if a second timeslot is allocated to the CCCH (i.e. BS_CC_CHANS = 2), then it necessarily has to be timeslot 2 (see 3GPP TS 45.002 [8]). Therefore only timeslots 4, 5 and 6 can be used for the transmission of MBMS, and the maximum number of timeslots is reduced to 3.

B.1.2 PBCCH not deployed, transmission without frequency hopping

Figure B.2

Figure B.2 shows that in this scenario the maximum number of timeslots that one or more MBMS sessions can be received upon is 4.

NOTE: It would be possible to receive multiple MBMS sessions on up to 6 timeslots, still meeting the requirement of T_ra = 1, but this exceeds the required multislot capabilities of an MBMS capable mobile station.

B.1.3 PBCCH deployed, transmission with frequency hopping

Figure B.3

Figure B.3 shows that in this scenario the maximum number of timeslots that one or more MBMS sessions can be received upon is 4.

NOTE 1: It would be possible to receive multiple MBMS sessions on up to 6 timeslots, still meeting the requirement of T_ra = 1, but this exceeds the required multislot capabilities of an MBMS capable mobile station.

It is assumed that channel combination xi (PBCCH+PCCCH+PDTCH/F+PACCH/F+PTCCH/F) is present on TN 0 and that all the PCCCH blocks are located on the same timeslot as the PBCCH (i.e. no PCCCH blocks are located on other timeslots).

NOTE 2: As paging coordination is mandatory in the network for MBMS, the mobile station does not need to read the BCCH and the CCCH.

It is also assumed that both the PBCCH and the MBMS traffic channels use frequency hopping, that the hopping pattern is the same and that, in every frame, the PBCCH and the MBMS traffic channels are transmitted on the same frequency. If the hopping pattern is not the same, the maximum number of timeslots that one or more MBMS sessions can be received upon is still 4.