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Content for TS 23.087 Word version: 18.0.0

1… 5… 6… 9…

5.1 Timers 5.2 Information flows of UUS services 5.3 Messages and their contents
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5 Handling of User-to-user signalling p. 8

5.1 Timers p. 8

5.2 Information flows of UUS services p. 9

5.2.1 Service 1 (UUS1) p. 9

5.2.1.1 Flow control p. 9

5.2.1.2 Information flows p. 10

5.2.1.2.1 Implicit activation p. 11

5.2.1.2.2 Explicit activation p. 12

5.2.2 Service 2 (UUS2) p. 13

5.2.2.1 Flow control p. 13

5.2.2.2 Information flows p. 13

5.2.3 Service 3 (UUS3) p. 15

5.2.3.1 Flow control p. 15

5.2.3.2 Information flows p. 16

5.3 Messages and their contents p. 19

5.3.1 Information elements used in the messages p. 19

5.3.2 Messages between MS and MSC p. 19

5.3.3 Messages between MSC and VLR (B interface) p. 20

5.3.4 Messages between MSC - MSC (E interface) p. 20