BP6 Unified Communications in a virtual desktop Hans Schermer Rob Sanders Systems Engineer, Citrix Systems GmbH Systems Engineer, Citrix Systems
2 New ways of communicating
Challenges with UC in a virtual desktop Device support Codecs HDX Gateway HDX XenDesktop Network conditions Scalability
HDX: High Definition Experience HDX Broadcast ICA and RDP protocol support for access from any device, anywhere HDX Plug-n-Play Access to local resources and peripherals HDX MediaStream Video and audio playback HDX RichGraphics 2D and 3D graphics incl. Adaptive Display, HDX 3D, HDX 3D Pro and RemoteFX HDX RealTime Voice and video for real-time collaboration HDX WAN Optimization Performance and bandwidth optimizations for branch offices HDX SmartAccess Simplified secure access HDX Adaptive Orchestration Best user experience based on server, network connection and user device
HDX RealTime VoIP-over-ICA
Audio codecs High definition audio Speech-optimized audio 96 kbps per channel XenDesktop default 16-32 kbps per channel Recommended for VoIP
HDX RealTime VoIP-over-ICA Lower latency audio path Multi-stream ICA for full QoS support, plus UDP/RTP for audio on XenDesktop (VDI) Packet tagging (DSCP and WMM) Audio plug-n-play and audio device routing Improved echo cancellation (speakers/mic) Client jitter buffer in Receiver 3.x for smoother audio when network latency is variable XenDesktop 5.5 VDI & Hosted Shared (XenApp 6.5)
Multi-Stream ICA for true HDX Network QoS Citrix Receiver for Windows ICA Real Time ICA Interactive ICA Bulk ICA Background Router ICA Real Time ICA Interactive ICA Bulk ICA Background ICA UDP/RTP Audio * ICA UDP Audio * XenDesktop Windows 7 or XenApp WS08 R2* HTTP HTTP HTTP Server * UDP/RTP initially only in VDI FlexCast model (XenDesktop 5.5)
Webcam video compression Collaborate in real-time to improve productivity Originally introduced for Microsoft Lync / Office Communicator New: Support for GoToMeeting HDFaces, Skype and Adobe Connect (and more to come) Add l apps supported by Generic USB Redirection Citrix Receiver for Windows and Citrix Receiver for Linux Support for almost all webcams (any that support DirectShow capture filters) Excellent latency tolerance 300 to 600 Kbps 800 Kbps 1 Mbps Good performance Good performance even with up to 200ms latency latency!
HDX RealTime: Complementary approaches Generic: Media-over-ICA Unmodified softphone ᵒ Very broad app compatibility Audio-video traffic transported over ICA Citrix audio/video codecs, echo cancellation, jitter buffering, etc., to maximize audio-video quality Optimized: Peer-to-peer Softphone modified or hooked to offload media processing to user device ᵒ Maximum server scalability Real-time audio-video traffic bypasses Citrix server ᵒ Zero degradation (no hairpinning )
HDX RealTime: Complementary approaches Generic: Media-over-ICA Optimized: Peer-to-peer server User Interface Business Logic Media Engine unmodified softphone architecture user device Media Engine modified softphone architecture User Interface Business Logic virtual channel
Optimization Pack for Microsoft Lync 2010 Optimized Unified Communications solution for Microsoft Lync Provides local-like voice and video experience in a virtual environment Highly scalable for large enterprise deployments of Lync Integrates seamlessly with existing Lync infrastructure Citrix Confidential - Do Not
Software Components HDX RealTime Connector Installed on XenDesktop or XenApp base image Integrates with Lync UI to provide seamless user experience (final UI in May beta release) Interacts with client-side Media Engine for call control and mid-call features
Software Components HDX RealTime Media Engine Installed on user device (Windows and Linux to start) as a plug-in or addon Responsible for all media processing and call control Interacts with RealTime Connector for invoking various UC functionalities
System Architecture
Features of optimized Lync support Audio Video Support Up to 720p30 transmit and receive resolutions Selectable 4:3 and 16:9 aspect ratios for transmitted video RT Video, H.264, H.263, H.263+, and H.263++ video codecs RT Audio, G.711, G.722, G.722.1, G.722.1c audio codecs Call Control Features Ad-hoc multi-party calling Mid-call Features Full Screen Mode and PIP 3rd Party Endpoint support Works with native Lync as well as standards-based UC clients registered with Lync Integration with Outlook, Office
Local Lync to local lync 1. Lync - call initiation 2. Lync - call established Lync Gateway Lync Server Rich Client - Win7 Local Lync Client Internet Rich Client - Win7 Local Lync Client
Local Lync to Lync in Virtual Desktop 1. Lync - call initiation 2. Lync - call established Lync Gateway Lync Server Rich Client - Win7 Local Lync Client Internet Citrix Access Gateway Virtual Desktop - Win7 Lync client Rich Client - Win7 Local Lync Client Citrix Receiver
Lync in Virtual Desktop to Lync in Virtual Desktop 1. Lync - call initiation 2. Lync - call established Lync Gateway Virtual Desktop - Win7 Lync client Lync Lync Server Lync Rich Client - Win7 Local Lync Client Citrix Receiver Internet Lync Citrix Access Gateway Virtual Desktop - Win7 Lync client Rich Client - Win7 Local Lync Client Citrix Receiver
Lync in Virtual Desktop to Lync in Virtual Desktop With Citrix Optimization for Lync 1. Lync - call initiation 2. Lync - call established Lync Gateway Virtual Desktop - Win7 Lync client HDX RealTime Connector Lync Lync Server Rich Client - Win7 Local Lync Client Citrix Receiver HDX RealTime Media Engine Internet Lync Rich Client - Win7 Local Lync Client Citrix Receiver HDX RealTime Media Engine Citrix Access Gateway Virtual Desktop - Win7 Lync client HDX RealTime Connector
High Level Call Flow XD/XA XD/XA 1 Initialize Media Engine Lync User A (with HDX Connector) Place Call 3 Lync Server SIP Registration 2 Receive Call 4 Lync User B (with HDX Connector) 1 Initialize Media Engine User Device (with HDX Media Engine) Call Established 5 User Device (with HDX Media Engine) ICA Signaling (SIP) Media (RTP)
Cisco VXI Solution Optimized for XenDesktop Data Center VM-User 1 ICA Uncompromised user experience Signalling (SIP) Signalling (SIP) VXC 6215 Routes voice and video point-to-point (no hairpinning) Optimized resources CUCM Signalling (SIP) VXI Cloud Signalling (SIP) Media Flow Bandwidth reduction from megabytes to kilobytes Reduced processing in data center (high scalability) VM-User 2 ICA VXC 4000 Enterprise-grade voice and video based on Cisco UC
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