6 RTP Payload Format Conformance for AMR

26.1303GPPRelease 18Speech/Audio Codec RTP Payload Format Conformance for UE TestingTS

6.1 Applicability

[The requirements and test methods in this clause shall apply when UE is used to provide narrowband telephony, either as a stand-alone service, or as part of a multimedia service.]

6.2 [Test cases in sending]

6.2.1 [Q-bit verification]

6.2.1.1 [Requirement]

[The Q-bit shall always bit set to 1 in the RTP payload.

NOTE: The Q-bit is the frame quality indicator [RFC 4867]. If set to 0, it indicates that the corresponding frame is severely damaged, and the receiver should set the RX_TYPE to either SPEECH_BAD or SID_BAD depending on the frame type (FT).]

6.2.1.2 [Test method]

[Editor’s note: test setup to be fully defined first, the principle of the test method could be to setup MT call(s) with AMR at predefined modes and analyse captured PCAP files at the IP level. ]

6.2.2 [Handling of CMR (open offer)]

6.2.2.1 [Requirement]

[The AMR bit rate (mode) in sending shall be according to the CMR inserted in receiving after [X] ms.]

6.2.2.2 [Test method]

[Editor’s note: test setup to be fully defined first, the principle of the test method could be to setup MT call(s) with AMR at predefined modes and analyse captured PCAP files at the IP level. ]

6.2.3 [Handling of CMR (restricted offer)]

6.2.3.1 [Requirement]

[The AMR bit rate (mode) in sending shall be according to the CMR inserted in receiving after [X] ms when this CMR is within the negotiated codec set.

A CMR outside the negotiated codec set shall be ignored, i.e. the AMR bit rate (mode) in sending shall not be changed after receiving a CMR outside the restricted offer and inserted in receiving.]

6.2.3.2 [Test method]

[Editor’s note: test setup to be fully defined first, the principle of the test method could be to setup MT call(s) with AMR at predefined modes and analyse captured PCAP files at the IP level. ]

6.2.4 [RTCP bandwidth verification]

6.2.4.1 [Requirement]

[RTCP conformance is defined in 3GPP TS 26.139.

Requirement to be defined]

7.2.4.2 [Test method]

[Editor’s note: test setup to be fully defined first, the principle of the test method could be to setup MT call(s) with AMR at predefined modes and analyse captured PCAP files at the IP level. ]

6.3 [Test cases in receiving]

tbd