TR 36.868
Study on Group Communication for E-UTRA

V12.0.0 (Wzip) 2014/03 23 p.

full Table of Contents for TR 36.868 Word version: 12.0.0

Scope p. 5

References p. 5

Definitions and abbreviations p. 5

3.1	Definitions p. 5
3.2	Abbreviations p. 6

Focus group communication requirements for evaluation of E-UTRA p. 6

Evaluation of E-UTRA procedures for group communication p. 7

5.1

Group communication using unicast bearers p. 7

5.1.1

Latency analysis p. 7

5.1.1.1	End to end setup time p. 7
5.1.1.2	Time for joining an ongoing group communication p. 9
5.1.1.3	End to end delay for media transport p. 11

5.1.2

Scalability p. 11

5.1.3

Use of Bearer Type p. 12

5.2

Group communication using MBMS p. 13

5.2.1

Latency analysis p. 13

5.2.1.1

Use of pre-established MBMS Point to Multipoint Radio Bearer (MRB) p. 13

5.2.1.1.1	End to end setup time p. 14
5.2.1.1.2	Time for joining an ongoing group communication p. 14
5.2.1.1.3	End to end delay for media transport p. 15
5.2.1.1.4	Aspects of pre-established MRBs p. 15

5.2.1.2

Use of unicast bearer for data transmission to Receiving Group Members while establishing MRB p. 15

5.2.2

Scalability p. 16

5.2.2.1	Capacity evaluation p. 16
5.2.2.2	Use of RoHC for group communication p. 16

5.2.3

Service continuity p. 17

5.2.3.1	Service continuity scenarios p. 17
5.2.3.2	Service continuity support p. 20

Conclusions p. 21

6.1	Possible specification enhancements p. 22

Change History p. 23