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precondition

2017-06-23 10:09:19   0  举报

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precondition for ims call flow

ims

作者其他创作

大纲/内容

PRACK

200 OK (PRACK)

SDP4

SDP2

200 OK (UPDATE)

a=curr:qos local sendrecva=curr:qos remote nonea=des:qos optional local sendrecva=des:qos mandatory remote sendrecv

RESERVITION

SDP3

200 OK (INVITE)

UEB

current-status = \"a=curr:\" precondition-type SP status-type SP direction-tag desired-status = \"a=des:\" precondition-type SP strength-tag SP status-type SP direction-tag confirm-status = \"a=conf:\" precondition-type SP status-type SP direction-tag precondition-type = \"qos\" | token strength-tag = (\"mandatory\" | \"optional\" | \"none\" = | \"failure\" | \"unknown\") status-type = (\"e2e\" | \"local\" | \"remote\") direction-tag = (\"none\" | \"send\" | \"recv\" | \"sendrecv\") SP Single Space

183 Session Progress

a=curr:qos local sendrecva=curr:qos remote sendrecva=des:qos optional local sendrecva=des:qos mandatory remote sendrecv

UPDATE

a=curr:qos local sendrecva=curr:qos remote sendrecva=des:qos mandatory local sendrecva=des:qos optional remote sendrecv

SDP1

INVITE

UEA

180 Ringing

ACK