Tech-invite 3GPPspace IETFspace

21 22 23 24 25 26 27 28 29 31 32 33 34 35 36 37 38 4‑5x

Content for TR 23.854 Word version: 11.0.0

1… 5…

5 Architectural requirements p. 9

5.1 General Architecture principles for Multimedia Priority Services p. 9

5.1.1 MPS High Level Principles p. 9

5.1.2 MPS Bearer Management Principles p. 10

5.2 IMS Multimedia Priority Services p. 10

5.2.1 General p. 10

5.3 Priority EPS Bearer Service p. 10

5.4 CS Fallback p. 11

5.4.1 CS Fallback to GERAN/UTRAN p. 11

5.4.1.1 Mobile-terminated GERAN/UTRAN CS Fallback call for a user in E-UTRAN p. 11

5.4.1.2 Mobile-originated GERAN/UTRAN CS Fallback call by a Service User p. 11

5.4.2 CS Fallback to 1xRTT p. 11

5.4.2.1 Mobile-terminated 1xCSFB call originated by service-user in 1xRTT p. 11

5.4.2.2 Mobile-originated 1xCSFB call by a service-user p. 11

5.5 SRVCC p. 12

6 Key Issues for MPS p. 12

6.1 IMS Multimedia Priority Services p. 12

6.1.1 Key Issue 1 - Mobile Originated MPS Voice Session p. 12

6.1.1.1 Description p. 12

6.1.1.2 Solution p. 12

6.1.1.3 Impacted entities in the System p. 14

6.1.2 Key issue 2 - QoS handling for IMS multimedia priority Service p. 14

6.1.2.1 Description p. 14

6.1.2.2 Solution p. 14

6.1.2.3 Impacted entities in the System p. 15

6.1.3 Key issue 3 - Mobile-terminating IMS multimedia service to a user in E-UTRAN p. 15

6.1.3.1 Description p. 15

6.1.3.2 Solution p. 15

6.1.3.2.1 Terminating MPS session to users when the existing ARP of the default bearer and IMS signalling bearer is not consistent with MPS use p. 15

6.1.3.2.2 Terminating MPS session to users when the existing ARP of the default bearer and IMS signalling bearer is already consistent with MPS use p. 17

6.1.4 Key Issue 4 - Priority information download procedure p. 19

6.1.4.1 Description p. 19

6.1.4.2 Solution p. 19

6.1.5 Key Issue 5 - Priority resource handling in SRVCC p. 21

6.1.5.1 Description p. 21

6.1.5.2 Solution p. 22

6.2 Priority EPS Bearer Service p. 23

6.2.1 Key issue1 - QoS of Default Bearer Assignment for an Always-On MPS Subscription p. 23

6.2.1.1 Description p. 23

6.2.1.2 Solution p. 23

6.2.2 Key issue2 - Priority Invocation/Revocation p. 25

6.2.2.1 Description p. 25

6.2.2.2 Solution p. 25

6.2.2.2.1 Solution 1: Upgrading/Downgrading priority (MPS) for Invoke/Revoke of On demand MPS p. 25

6.2.2.2.2 Solution-2: Always On MPS Activation p. 25

6.2.2.3 Impacted entities in the System p. 26

6.2.2.3.1 Solution-1: Upgrading/Downgrading priority (MPS) for Invoke/Revoke of On demand MPS p. 26

6.2.2.3.2 Solution-2: Always On MPS Activation p. 26

6.3 CS Fallback p. 27

6.3.1 CS Fallback to GERAN/UTRAN p. 27

6.3.1.1 Key Issue1 - Priority handling of mobile terminating call p. 27

6.3.1.1.1 Description p. 27

6.3.1.1.2 Solution p. 27

6.3.1.1.3 Impacted functions in the System p. 30

6.3.1.2 Key Issue2 - Priority radio resource handling in CS fallback p. 31

6.3.1.2.1 Description p. 31

6.3.1.2.2 Solution p. 31

6.3.1.2.3 Impacted functions in the System p. 33

6.3.1.3 Key Issue 3 - Priority handling of mobile originating call p. 33

6.3.1.3.1 Description p. 33

6.3.1.3.2 Solution p. 33

6.3.1.3.3 Impacted functions in the System p. 35

6.3.2 CS Fallback to 1xRTT p. 35

6.3.2.1 Key Issue1 - Procedure Flow for Priority handling of mobile terminating call p. 35

6.3.2.1.1 Description p. 35

6.3.2.1.2 Solution p. 36

6.3.2.1.3 Impacted functions in the System p. 37

6.3.2.2 Key Issue 2 - Procedure flow for Priority handling of mobile originated call p. 37

6.3.2.2.1 Description p. 37

6.3.2.2.2 Solution p. 37

6.3.2.3 Impacted functions in the System p. 39

7 Overall Solution p. 39

7.1 IMS Multimedia Priority Services p. 39

7.2 Priority EPS Bearer Service p. 39

7.3 CS Fallback p. 39

8 Conclusions p. 39

$ Change history p. 41