12.2 Extending pss and mbms User Services for optimized Mobile tv uid_34043

Resources: S4

References

Document	Title/Contents
WID(s)
SP-070757	WID on Extending PSS and MBMS User Services for optimized Mobile TV
Impacted Specifications
TS 26.234	Transparent end-to-end Packet-switched Streaming Service (PSS); Protocols and codecs
TS 26.346	Multimedia Broadcast/Multicast Service (MBMS); Protocols and codecs
TS 26.946	Multimedia Broadcast/Multicast Service (MBMS) user service guidelines
New Dedicated Specifications/Reports
-	-

Supporting Individual Members: Ericsson, Apple, Vidiator, Nokia, Digital Fountain, RealNetworks.

UID	Name	Resource	Acronym	Hyperlink	TS_TR
34043	Extending PSS and MBMS User Services for optimized Mobile TV	S4	PSS_MBMS_OMTV	SP-070757	26.234, 26.346, 26.946

Mobile TV is an important service for MBMS in particular for E-UTRAN access, covered in SA1 TS 22.246 clause 5.1.

Packet Switching Streaming (PSS) enabler was enhanced in Rel-7 allowing fast content switching and start up. Rel-7 PSS offers Mobile TV with sufficiently fast channel switching performance even on unicast. PSS and MBMS User Services (MBMSUSE) are foreseen to be used in combination for offering best possible experience to mobile end-user in a network resource efficient way. Therefore, SA4 sees PSS and MBMSUSE as a single entity to be optimized for Mobile TV which includes also downloaded content e.g. to realize Push TV services. Objectives to extend PSS and MBMSUSE for Mobile TV:

• Tune-in time reduction for MBMS based services;

• Fast Channel Switching for FEC protected channels;

• Guidelines/Improvements PSS to MBMSUSE (and vice versa) channel switching;

• General improvements and additions for MBMSUSE and PSS;

• Time-shifting of live PSS offerings;

• Recording file format in the client;

• Support for more advanced Audiovisual Codecs;

• Server file formats.

12.3 Encoding formats, transport formats and media description signalling for interworking, QoE, and other enhancements to mtsi-mhi uid_400028

Resources: S4,C3,C4

References

Document	Title/Contents
WID(s)
SP-080443	S4 Feature WID on Encoding formats, transport formats and media description signalling for interworking, QoE, and other enhancements to MTSI-MHI (MTSI_eMHI)
Impacted Specifications
-	See below
New Dedicated Specifications/Reports
-	See below

Supporting Individual Members: Ericsson, Qualcomm, Nokia, France Telecom, Orange, Telecom Italia, T-Mobile International, Samsung, Huawei.

UID	Name	Resource	Hyperlink	TS_TR
400028	Encoding formats, transport formats and media description signalling for interworking, QoE, and other enhancements to MTSI-MHI	-	SP-080443	-
34041	MTSI Video - Dynamic Rate Adaptation/Signalling of Image Size	S4	SP-080246	26.114
400018	CT3 part of Enhancement of interworking between MTSI and CS networks	C3	CP-080774	29.163
400020	CT4 part of Enhancement of interworking between MTSI and CS networks	C4	CP-080774	29.332

This Feature has the following Building Blocks:

• MTSI Video: Dynamic Rate Adaptation/Signalling of Image Size (MTSIV_DRASIS) UID_34041

• CT-wide WID on Enhancement of interworking between MTSI and CS networks UID_400019, 400018, 400020)

Rel-7 TS 26.114 defined Media Handling and Interaction (MHI) procedures for Multimedia Telephony Service for IMS (MTSI), enabling telephony-grade services over QoS controlled bearers. Due to Rel-7 closure only a minimum set of requirements could be completed.

In the Common IMS work, it has been decided that codecs are not included and that 3GPP is responsible for ensuring that necessary procedures are defined so that inter-working with other systems is ensured.

SA4 and CT1 realized that the session media configuration in TS 26.114 is suboptimal for many interworking scenarios and for call scenarios requiring forking.

MTSI terminals are deployed and need to interoperate with the existing base of CS 3GPP terminals. For MTSI video, this requires interworking with the deployed base of 3GPP H.324M video telephony terminals.

Interworking between PS and CS conversational video services introduces challenges that can result in increase of end-to-end latency and/or degradation of video quality. In order to enable good inter-working, MTSI should include features and tool-sets capable of allowing the service to interwork efficiently with CS video telephony terminals.

For these reasons SA4 TS 26.114 MTSI-MHI was enhanced to:

• Introduce higher bit rate, profiles and/or levels for video coding.

• Introduce coding support for generic signal types including non-speech signals (e.g. ring-back signals and music-on-hold).

• Implement necessary media functionality for interworking to ensure that a 3GPP service can interoperate with other similar services, applications and clients defined by 3GPP or other bodies. This includes all media handling aspects e.g.: encoding / transport formats and session description signalling. Most important interworking scenarios:

• CS/PS voice and/or video telephony services defined by 3GPP (CS GERAN; CS UTRAN and CSoHS).

• Video interworking with 3G-324M

  • define new SDP attribute(s) to enhance interworking between MTSI video and H.324M terminals;

  • provide guidance on usage of defined SDP attribute(s) by terminals and interworking gateways;

  • provide guidance on usage of RTCP AVPF messages (e.g., Picture Loss Indication and Codec Control Messages) in interworking gateways.

• CS/PS voice, video and/or Multimedia Telephony services defined by ETSI.

• VoIP and/or Multimedia Telephony services defined in ITU, 3GPP2, PacketCable, etc.

• Improve session media configuration for inter-working with other networks, applications and clients.

• Introduce support for service performance monitoring.

Backwards compatibility with Rel-7 was ensured. User experience and service efficiency was enhanced. Interoperability with other similar services was improved.

Interworking was enhanced in close cooperation with CT1, CT3, CT4, TISPAN, etc.

MTSI Video - Dynamic Rate Adaptation/Signalling of Image Size (MTSIV_DRASIS) UID_34041

Resources: S4