B.2 Data transfer when an uplink feedback channel is established

3GPP43.246Multimedia Broadcast/Multicast Service (MBMS) in the GERANRelease 16Stage 2TS

B.2.1 PBCCH not deployed, transmission with frequency hopping

Figure B.4

In this configuration, it is assumed that the BCCH and the CCCH are located on timeslot 0 (with no additional timeslots assigned to CCCH). As shown in Figure B.4, the mobile station is able to transmit also when the BCCH or the CCCH need to be read, if one or more MBMS sessions are received on up to 3 timeslots.

NOTE 1: If in a frame the MS needs to read the BCCH or CCCH and transmit on the uplink, the MS will need to perform three switchings within that frame.

NOTE 2: After receving a (pre-)notification for a new session while listening to an ongoing session, the mobile station enters non-DRX mode and listens to all the paging blocks on the CCCH to receive a(n) (notification)assignment. As the time elapsing until the assignment received on the mobile station side (see subclauses 6.1.1.2, 6.1.1.3, 6.1.1.4) could last for a considerable length of time (up to the value of T3214, which is equal to 60 seconds, see 3GPP TS 44.018 and 3GPP TS 44.060), the worst case is in those frames where the mobile station is required to: read 1 timeslot for BCCH or CCCH, use 1 timeslot for switching from the reception of BCCH/CCCH to the reception of MBMS, read 3 timeslots for MBMS and transmit on 1 timeslot to send feedback. In this scenario the sum of RX and TX is equal to 6; this leaves only 2 timeslots for switching. As the mobile station needs to be able to perform neighbour cell measurements during these periods, it follows that Ttb = 1 and Tra = 1.

B.2.2 PBCCH not deployed, transmission without frequency hopping

Figure B.5

In this scenario, the maximum number of timeslots that one or more MBMS sessions can be received upon is 4. This assumes that both the BCCH and the CCCH are located on timeslot 0.

NOTE: After receving a (pre-)notification for a new session while listening to an ongoing session, the mobile station enters non-DRX mode and listens to all the paging blocks on the CCCH to receive a(n) (notification)assignment. As the time elapsing until the assignment received on the mobile station side (see subclauses 6.1.1.2, 6.1.1.3, 6.1.1.4) could last for a considerable length of time (up to the value of T3214, which is equal to 60 seconds, see 3GPP TS 44.018 and 3GPP TS 44.060), the worst case is in those frames where the mobile station is required to: read 1 timeslot for BCCH or CCCH, read 4 timeslots for MBMS and transmit on 1 timeslot to send feedback. In this scenario the sum of RX and TX is equal to 6; this leaves only 2 timeslots for switching. As the mobile station needs to be able to perform neighbour cell measurements during these periods, it follows that Ttb = 1 and Tra = 1.

B.2.3 PBCCH deployed, transmission with frequency hopping

Figure B.6

Figure B.6 shows that in this scenario the maximum number of timeslots that one or more MBMS sessions can be received upon is 4.

It is assumed that the PBCCH and the PCCCH are located on a single timeslot. If the PCCCH is transmitted on more than one timeslot, then the number of timeslots that one or more MBMS sessions can be received upon is reduced accordingly.

NOTE 1: As paging coordination is mandatory in the network for MBMS, the mobile station does not need to read the BCCH and the CCCH.

NOTE 2: After receving a (pre-)notification for a new session while listening to an ongoing session, the mobile station enters non-DRX mode and listens to all the paging blocks on the PCCCH to receive a(n) (notification)assignment. As the time elapsing until the assignment received on the mobile station side (see subclauses 6.1.1.2, 6.1.1.3, 6.1.1.4) could last for a considerable length of time (up to the value of T3214, which is equal to 60 seconds, see 3GPP TS 44.060), the worst case is in those frames where the mobile station is required to: read 1 timeslot for PBCCH or PCCCH, read 4 timeslots for MBMS and transmit on 1 timeslot to send feedback. In this scenario the sum of RX and TX is equal to 6; this leaves only 2 timeslots for switching. As the mobile station needs to be able to perform neighbour cell measurements during these periods, it follows that Ttb = 1 and Tra = 1.

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 multiple MBMS sessions can be received upon is reduced to 3.

NOTE 3: If the hopping pattern is not the same and in a frame the MS needs to read the PBCCH or PCCCH and transmit on the uplink, the MS will need to perform three switchings within that frame.

Annex C (informative):
Change history

Change history

Date

TSG #

TSG Doc.

CR

Rev

Subject/Comment

Old

New

2004-08

GP-21

GP-042241

Approved for Release 6

6.0.0

2004-11

GP-22

GP-042782

001

1

MBMS cell reselection

6.0.0

6.1.0

2004-11

GP-22

GP-042800

002

1

Definition of MPRACH

6.0.0

6.1.0

2004-11

GP-22

GP-042778

003

1

Clarification on RLC protocol behaviour

6.0.0

6.1.0

2004-11

GP-22

GP-042801

004

2

Editorial corrections

6.0.0

6.1.0

2004-11

GP-22

GP-042908

007

3

Suspension & Resumption of the reception of an MBMS session

6.0.0

6.1.0

2004-11

GP-22

GP-042566

008

Addition of flexible reconfiguration for MBMS_BEARER_ID and MS_ID

6.0.0

6.1.0

2004-11

GP-22

GP-042678

009

1

Addition of reception of multiple sessions

6.0.0

6.1.0

2004-11

GP-22

GP-042679

010

1

Addition of the cause indication whereby an MBMS p-t-m bearer is not established in a cell inside the MBMS ASSIGNMENT message

6.0.0

6.1.0

2004-11

GP-22

GP-042805

011

1

Prioritzing MBMS Neighbouring Cell Information

6.0.0

6.1.0

2004-11

GP-22

GP-042807

012

1

Introduction of prenotification

6.0.0

6.1.0

2004-11

GP-22

GP-042681

013

1

Modifications to description of MBMS Channels

6.0.0

6.1.0

2004-11

GP-22

GP-042898

014

3

Use of the MBMS NEIGHBOURING CELL INFORMATION message

6.0.0

6.1.0

2004-11

GP-22

GP-042896

015

2

MBMS notification for MS in packet transfer mode

6.0.0

6.1.0

2004-11

GP-22

GP-042897

016

2

MBMS notification for MS in dedicated mode

6.0.0

6.1.0

2005-01

GP-23

GP-050309

019

Repeated notifications of an ongoing session

6.1.0

6.2.0

2005-01

GP-23

GP-050310

020

Definition of when MBMS ASSIGNMENT is a distribution or non-distribution message

6.1.0

6.2.0

2005-01

GP-23

GP-050438

021

1

Update of sub-clause 6.1.1.3

6.1.0

6.2.0

2005-01

GP-23

GP-050439

022

1

Access limitation definitions

6.1.0

6.2.0

2005-01

GP-23

GP-050369

023

Deletion of MS ID

6.1.0

6.2.0

2005-01

GP-23

GP-050598

024

2

Clean-up to the MBMS stage 2

6.1.0

6.2.0

2005-01

GP-23

GP-050564

025

Corrections related to cell reselection

6.1.0

6.2.0

2005-04

GP-24

GP-050985

026

1

Clarification of usage of ARQ and block repetition

6.2.0

6.3.0

2005-04

GP-24

GP-050634

027

Removal of multiple MBMS radio bearers per MBMS service per cell

6.2.0

6.3.0

2005-04

GP-24

GP-050988

028

1

Align Resource Management Procedure with Stage 3

6.2.0

6.3.0

2005-04

GP-24

GP-050891

029

Clarification of PACKET POLLING REQUEST message in MBMS broadcast/multicast mode

6.2.0

6.3.0

2005-04

GP-24

GP-051128

030

2

MBMS notification for MSs in dedicated mode

6.2.0

6.3.0

2005-06

GP-25

GP-051359

031

Clarification to counting requirement for higher priority MBMS sessions during multiple sessions

6.3.0

6.4.0

2005-06

GP-25

GP-051677

032

1

Clarification of the session duration timer

6.3.0

6.4.0

2005-06

GP-25

GP-051493

033

Corrections to Annex B

6.3.0

6.4.0

2005-09

GP-26

GP-052235

0034

2

Introduction of MBMS DOWNLINK ACK/NACK message

6.4.0

6.5.0

2005-09

GP-26

GP-052232

0035

1

Introduction of ARP for MBMS

6.4.0

6.5.0

2005-11

GP-27

GP-052461

0036

Correction to MBMS notification for mobile stations in DTM or MAC-DTM state

6.5.0

6.6.0

2005-11

GP-27

GP-052462

0037

Correction to passive mode

6.5.0

6.6.0

2005-11

GP-27

GP-052878

0038

3

MBMS Transfer Mode

6.5.0

6.6.0

2006-04

GP-29

GP-060710

0040

Correction to reconfiguration for an MBMS radio bearer

6.6.0

6.7.0

2006-04

GP-29

GP-060858

0043

1

Clarification for T3195

6.6.0

6.7.0

2006-04

GP-29

GP-060777

0039

2

MBMS cell reselection enhancement

6.7.0

7.0.0

2006-06

GP-30

GP-061337

0045

1

Correction to MS_ID release procedure

7.0.0

7.1.0

2006-09

GP-31

GP-061864

0047

2

Differentiation of the MBMS multislot capability requirements

7.1.0

7.2.0

2006-09

GP-31

GP-061762

0049

1

Correction to the MBMS assignment on the CCCH

7.1.0

7.2.0

2006-11

GP-32

GP-062099

0050

Introduction of the MBMS Session Update procedure

7.2.0

7.3.0

2006-11

GP-32

GP-062412

0052

2

Introduction of NPM Transfer Time

7.2.0

7.3.0

2008-12

GP-40

Version for Release 8

7.3.0

8.0.0

2009-12

GP-44

Version for Release 9

8.0.0

9.0.0

2011-03

GP-49

Version for Release 10

9.0.0

10.0.0

2012-09

GP-55

Version for Release 11

10.0.0

11.0.0

2014-09

GP-63

Version for Release 12 (frozen at SP-65)

11.0.0

12.0.0

2015-12

GP-68

Version for Release 13 (frozen at SP-70)

12.0.0

13.0.0

Change history

Date

Meeting

TDoc

CR

Rev

Cat

Subject/Comment

New version

2017-03

RP-75

Release 14 version (frozen at TSG-75)

14.0.0

2018-06

RP-80

Release 15 version (frozen at TSG-80)

15.0.0

2020-07

RP-88e

Upgrade to Rel-16 version without technical change

16.0.0