US20130191570A1 - MULTI-MEDIA USB DATA TRANSFER OVER DIGITAL INTERACTION INTERFACE FOR VIDEO AND AUDIO (DiiVA) - Google Patents

MULTI-MEDIA USB DATA TRANSFER OVER DIGITAL INTERACTION INTERFACE FOR VIDEO AND AUDIO (DiiVA) Download PDF

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US20130191570A1
US20130191570A1 US13/521,739 US201113521739A US2013191570A1 US 20130191570 A1 US20130191570 A1 US 20130191570A1 US 201113521739 A US201113521739 A US 201113521739A US 2013191570 A1 US2013191570 A1 US 2013191570A1
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United States
Prior art keywords
usb
packet
port
usb port
upstream
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US13/521,739
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English (en)
Inventor
Dongyun Lee
Edward Pak
John Hahn
Mayank Gupta
Byoung Woon Kim
Paul Heninwolf
Sangwan KIM
Sukjae Cho
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UNIVERSAL CONNECTIVITY TECHNOLOGIES INC.
SYNERCHIP Co Ltd
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SYNERCHIP Co Ltd
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Priority to US13/521,739 priority Critical patent/US20130191570A1/en
Assigned to SILICON IMAGE, INC. reassignment SILICON IMAGE, INC. NUNC PRO TUNC ASSIGNMENT (SEE DOCUMENT FOR DETAILS). Assignors: SYNERCHIP CO., LTD.
Assigned to Synerchip Co. Ltd. reassignment Synerchip Co. Ltd. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHO, SUKJAE, KIM, BYOUNG WOON, GUPTA, MAYANK, HAHN, JOHN, HENINWOLF, PAUL, KIM, SANGWAN, LEE, DONGYUN, PAK, EDWARD
Publication of US20130191570A1 publication Critical patent/US20130191570A1/en
Assigned to JEFFERIES FINANCE LLC reassignment JEFFERIES FINANCE LLC SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DVDO, INC., LATTICE SEMICONDUCTOR CORPORATION, SIBEAM, INC., SILICON IMAGE, INC.
Assigned to LATTICE SEMICONDUCTOR CORPORATION reassignment LATTICE SEMICONDUCTOR CORPORATION MERGER (SEE DOCUMENT FOR DETAILS). Assignors: SILICON IMAGE, INC.
Assigned to LATTICE SEMICONDUCTOR CORPORATION, SILICON IMAGE, INC., DVDO, INC., SIBEAM, INC. reassignment LATTICE SEMICONDUCTOR CORPORATION RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: JEFFERIES FINANCE LLC
Assigned to UNIVERSAL CONNECTIVITY TECHNOLOGIES INC. reassignment UNIVERSAL CONNECTIVITY TECHNOLOGIES INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LATTICE SEMICONDUCTOR CORPORATION
Abandoned legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/43615—Interfacing a Home Network, e.g. for connecting the client to a plurality of peripherals
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
    • G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
    • G06F13/4286—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus using a handshaking protocol, e.g. RS232C link
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
    • H04N21/43632—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wired protocol, e.g. IEEE 1394
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
    • H04N21/43632—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wired protocol, e.g. IEEE 1394
    • H04N21/43635—HDMI
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2370/00—Aspects of data communication
    • G09G2370/04—Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller
    • G09G2370/045—Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller using multiple communication channels, e.g. parallel and serial
    • G09G2370/047—Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller using multiple communication channels, e.g. parallel and serial using display data channel standard [DDC] communication
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2370/00—Aspects of data communication
    • G09G2370/12—Use of DVI or HDMI protocol in interfaces along the display data pipeline
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2803—Home automation networks
    • H04L12/2838—Distribution of signals within a home automation network, e.g. involving splitting/multiplexing signals to/from different paths
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2803—Home automation networks
    • H04L2012/2847—Home automation networks characterised by the type of home appliance used
    • H04L2012/2849—Audio/video appliances

Definitions

  • DiiVA Digital Interactive Interface For Video And Audio
  • DiiVA is a bi-directional audio/video interface that allows uncompressed high-definition video, as well as multi-channel audio, high-bandwidth, and bi-directional data to be transferred over a single cable.
  • DiiVA implements a bi-directional hybrid data channel capable of transporting different types of data, including but not limited to audio data, control data, Ethernet data, and bulk data.
  • USB Universal Serial Bus
  • FIG. 1 illustrates one example of a USB connection with a DiiVA network, in accordance with one embodiment of the present disclosure.
  • FIG. 2 is a block diagram of a system configured to communicate USB data over a DiiVA network, in accordance with one embodiment of the present disclosure.
  • FIG. 3 illustrates turn-around time constraint in USB, in accordance with one embodiment of the present disclosure.
  • FIG. 4A illustrates one example of a Hybrid Link USB packet, in accordance with one embodiment of the present disclosure.
  • FIG. 4B is a table illustrating the SSINFO Field of the Hybrid Link USB packet shown in FIG. 3
  • FIG. 5 schematically illustrates one example of high-speed USB enumeration, in accordance with one embodiment of the present disclosure.
  • FIG. 6 illustrates an example of control transfer in DiiVA USB, in accordance with one embodiment of the present disclosure.
  • DiiVA which includes a bi-directional hybrid link as well as uni-directional links.
  • DiiVA is a bi-directional audio/video interface that can allows uncompressed high-definition video, multi-channel audio, and high-bandwidth, bi-directional data to be all transferred over a single cable.
  • DiiVA implements a bi-directional hybrid link capable of carrying audio, control, and bulk (Ethernet and USB) data, and status information.
  • DiiVA also includes uni-directional video links dedicated to carrying noncompressed video pixel data and synchronization.
  • DiiVA cable contain four twisted pairs, one of which is the hybrid link, and the remaining three of which comprise the uni-directional video links.
  • DiiVA allows users to connect, configure and control a plurality of consumer electronic devices (including without limitation DVD players, digital video recorders, set top boxes, personal computers, camcorders, cameras, and home stereo systems, just by way of example) from their digital TV or other DiiVA node.
  • USB 2.0 specification and “USB 3.0 specification,” which are publicly available through the internet, and which are incorporated herein by reference in their entireties.
  • the techniques disclosed in the present disclosure may be used for the transfer of multi-media data and network management in any other system (i.e., system other than DiiVA) that includes the capability of both uni-directional and bi-directional data transfer over a single cable.
  • system other than DiiVA system other than DiiVA
  • FIG. 1 schematically illustrates one example of a USB connection in a DiiVA network.
  • one or more DiiVA Hybrids Link serve to extend the USB connection through a DiiVA network 110 .
  • USB in DiiVA can seamlessly connect a USB host 120 to at least one USB device 130 to the DiiVA network 110 .
  • the DiiVA network 110 can function as if there were only a USB cable between the USB host 120 and the USB device 130 .
  • the DiiVA network as a whole, inclusive of the USB device 130 can function as if there were only a USB device 130 connected to the USB host 120 through a USB cable and a USB upstream port, i.e., a USB port that faces upstream.
  • FIG. 2 is a schematic block diagram of a system 200 configured to communicate USB data over a DiiVA network 210 , in accordance with one embodiment of the present disclosure.
  • the system 200 includes a USB host controller 220 (for example a personal computer) connected to at least one USB device 230 (examples of which include without limitation a webcam or a memory stick) through a USB connection.
  • the USB connection requires two DiiVA devices, DiiVA device A (shown with reference numeral 205 ) and DiiVA device B (shown with reference numeral 206 ), one connected to the USB host 220 and the other connected to the USB device 230 .
  • USB host 220 is connected to a USB upstream port 225 of DiiVA device A ( 205 ), and USB device 230 is connected to USB downstream port 226 of DiiVA device B ( 206 ).
  • a DiiVA device can have multiple USB upstream ports or multiple USB downstream ports, as seen in FIG. 2 .
  • the system 200 thus includes a first DiiVA device 205 connected to the USB host controller 220 through an upstream USB port 225 , a second DiiVA device 206 connected to the USB device 230 through a downstream USB port 226 ; and a DiiVA network 210 connecting the two DiiVA devices 205 and 206 .
  • the DiiVA network 210 includes at least one bi-directional DiiVA hybrid link 240 , and transfers data through the link between the first DiiVA device 205 and the second DiiVA device 206 , according to USB protocol.
  • the elements in the DiiVA network 210 including but not limited to the hybrid link 240 , and the first and second DiiVA device 205 and 206 , all include hardware such as a processor or controller configured to carry out the functions described in the present disclosure.
  • the network 210 is responsive to the USB host controller 220 to deliver contents for the USB protocol by transmitting through the hybrid link 240 at least one line state information packet and at least one USB data packet, between the upstream USB port 225 and the downstream USB port 226 .
  • the first 205 and second 206 DiiVA device each include a USB PHY (physical layer) 232 connected to logical module 234 through an interface 236 .
  • the logical module 234 may be a transceiver having bi-directional connection and configured to carry and share multi-protocol data.
  • the interface 236 is UTMI (USB 2.0. Transceiver Microcell Interface) or ULPI (UTMI+Low Pin Interface). In other embodiments, interfaces other than UTMI or ULPI may be used.
  • USB protocol relies on line state information, or the state of D+ and D ⁇ , and has limitations on turn-around time and the cable length.
  • a DiiVA network does not guarantee delivery time and thus take a long time.
  • FIG. 3 illustrates such a turn-around time constraint in USB, in accordance with one embodiment of the present disclosure.
  • USB protocol defines the bus turn-around time limitation and it is considered as error if the response does not arrive within given time.
  • DiiVA protocol itself does not guarantee the Hybrid Link Packet delay.
  • USB in DiiVA uses USB flow-control protocol with NAK for Bulk/Control/Interrupt Transfer.
  • USB protocol defines both minimum and maximum period of the turn-around time and the inter-packet delay.
  • the minimum period can be controlled by buffering the USB data packet.
  • the maximum period cannot be easily met because DiiVA network has inherent network delay and also does not guarantee the inter-packet delay. This issue affects the bus turn-around timing in two ways. One is when USB host waits and the other is when USB device waits as shown in FIG. 3 .
  • DiiVA specific protocols for USB are described that overcome these limitations. Examples include without limitation The line state emulation, flow-control mechanism, and speculative ACK/NAK. By using these protocols, any USB host to any USB device point-to-point connection can be made through a DiiVA network. Multiple point-to-point connections also are possible under DCL management.
  • USB line state information is available only when the USB host and the USB device are physically connected. As shown in FIG. 2 , however, the DiiVA network 210 , the USB host 220 and the USB device 230 are not directly connected, so line state information is not readily available.
  • line state information at the UTMI (or ULPI) interface 260 of USB host 220 and USB device 230 is delivered over the DiiVA network 210 by a hybrid link USB packet to the other side of the USB host 220 and the USB device 230 .
  • the line state information packet transmitted through the hybrid link 240 contains packetized line state information about one or more events.
  • FIG. 4A illustrates one example of such a hybrid link USB packet 400 , in accordance with one embodiment of the present disclosure.
  • Source and destination information i.e. the exact USB port, can be specified with a combination of CH_ID and Service ID information.
  • the hybrid link USB packet contains a variety of USB related information.
  • the SSINFO field of Hybrid Link USB Packet carries this information.
  • FIG. 4B is a table illustrating the line state events for which information is contained the SSINFO field of the hybrid link USB packet shown in FIG. 4A .
  • the prefix UU_ indicates the packet direction from USB Upstream-facing port to USB Downstream-facing port.
  • UD_prefix indicates the reverse direction.
  • J state and K state definitions in FIG. 4B follow those for full-speed USB as set forth in the USB 2.0 specification.
  • Address and Endpoint fields, between bits 16 and 27 indicate the generic USB Packet USB address and USB endpoint.
  • a transmitting USB port packetizes all line state information and transmits the packetized information to a receiving USB port.
  • the receiving USB port sets the UTMI or ULPI interface to emulate the line state behavior of the transmitting USB port.
  • the upstream USB port 225 is the transmitting USB port and the downstream USB port 226 is the receiving USB port. In other embodiments, the upstream USB port 225 is the receiving USB port and the downstream USB port 226 is the transmitting USB port.
  • Enumeration in USB is a process of determining what device has just been connected to the bus, and what parameters (such as power consumption, number of endpoints etc.) it requires.
  • the USB device enumeration process thus starts when a USB device is first connected to a USB host.
  • the USB host assigns the device a unique address and sets up a configuration that allows the device to transfer data on the bus.
  • FIG. 5 schematically illustrates one example of a method 500 of performing high-speed USB enumeration in a DiiVA network, in accordance with one embodiment of the present disclosure.
  • a high-speed USB device is attached to a USB downstream port 515 , as illustrated in step 510 , namely USB device attach.
  • a UD_FS_DEVICE_READY packet 518 is then sent to a USB upstream port 516 .
  • the USB host is attached, as shown in the step 520 , namely USB host Plug In. VBus assertion in the USB upstream port 516 is detected.
  • the USB upstream port 516 sends UU_VBUS_DETECT 524 to the USB downstream port 515 and the USB downstream port 515 deasserts VBus, as shown in the deassertion step, 525 .
  • the USB upstream port 516 sends UU_VBUS_ENABLE 532 to the USB downstream port 515 and the USB downstream port 515 asserts Bus, step 522 .
  • the USB downstream port 515 detects J state, step 534 , and sends UD_J_STATE 536 to the USB upstream port 516 .
  • the USB upstream port 516 detects USB Reset from the USB host, step 540 , and sends UU_USB_RESET 542 .
  • the USB downstream port 515 then detects K Chip in step 546 , and sends UD_K_STATE 544 .
  • the USB downstream port 515 detects SE0 state and send UD_SEO_STATE 548 .
  • step 550 toggling K-J Chirps are detected and UU_K_STATE 552 and UU_J_STATE 554 are sent to the USB downstream port 515 .
  • SOF is detected from the USB host in step 560 , and high-speed enumeration is complete.
  • USB Full Speed enumeration and/or USB Low Speed enumeration may be performed.
  • performing Full Speed enumeration may comprise the acts of:
  • Low Speed enumeration may be performed.
  • performing Low Speed enumeration may comprise the acts of:
  • the upstream USB port sends VBus Enable event packet to the downstream USB port, and the downstream USB port asserting Vbus;
  • the downstream USB port detecting K State, and sending K State event packet; the upstream USB port detecting USB Reset from the USB host controller and sending USB Reset event packet;
  • the upstream USB port detecting K state, and sending the K State Event packet to the downstream USB port;
  • a USB Suspend and Resume operation may be performed.
  • the following acts may be performed:
  • upstream USB port detects K State, upstream USB port generating K State event packet and going to Resume state.
  • USB host During an IN transaction, USB host expects Data packet or handshake after IN is issued within maximum bus turn-around time.
  • the OUT transaction requires the same constraint on the handshake after OUT/SETUP and Data is transmitted.
  • the USB Upstream-facing port in DiiVA device uses NAK with a flow control mechanism illustrated in FIG. 6 , in one embodiment of the present disclosure.
  • an USB upstream port 625 receives SETUP and delivers the SETUP USB packet to a USB downstream port 626 .
  • the downstream USB port 626 buffers this SETUP until next DATA is available on the downstream USB port. Meanwhile, the upstream USB port 625 sends a speculative ACK even if ACK from USB device is not available.
  • the downstream USB port 626 starts to send SETUP and DATA and receives ACK.
  • the IN transaction and OUT transaction occur as follows: the upstream USB port 625 receives IN and delivers to the downstream USB port 626 .
  • the downstream USB port 626 sends IN and get the response from the USB device.
  • the upstream USB port 625 first sends NAK for IN or OUT/DATA until DATA or handshake are available from the USB device.
  • the USB upstream port 625 unblocks the next coming IN or OUT/DATA and delivers to the USB downstream port 626 to send IN or OUT/DATA to the USB device again with NAK handshake to the USB host. If the USB device sends DATA for IN or ACK for OUT/DATA and DATA or ACK arrives at the USB upstream port 625 , the USB downstream port 626 responds with ACK for IN transaction and delivers this DATA for IN or ACK for OUT to the USB upstream port 625 . The USB upstream port 625 sends DATA for next IN available or ACK for next OUT/DATA available.
  • the USB upstream port 625 always responds with ACK for SETUP transaction because it is required to receive SETUP and DATA and responds with ACK according to USB Specification.
  • the USB downstream port 626 buffers OUT or SETUP until next coming DATA is available in the USB downstream port 626 to guarantee the inter-packet delay between OUT/SETUP and DATA.
  • USB supports a number of different types of data transfers: isochronous, interrupt, bulk, and control transfers.
  • Isochronous transfers occur at some guaranteed data rate but with possible data loss, for example for real time audio or video.
  • Interrupt transfers are used for devices that need guaranteed quick responses (bounded latency), such as pointing devices and keyboards.
  • Bulk transfers are large sporadic transfers that use all remaining available bandwidth, but have no guarantees on bandwidth or latency, such as file transfers.
  • Control transfers are typically used for short, simple commands to the device, and a status response, used, for example, by the bus control pipe number 0.
  • isochronous transfers use zero data and pipelines IN transaction scheme.
  • the USB upstream port responds with zero data, which is legitimate in the USB specification.
  • This first IN is delivered to a USB downstream port and gets the DATA from an isochronous USB device.
  • This first DATA is used to reply to the next isochronous IN when it arrives at USB upstream module. In this way, the USB host receives the delayed and pipelined isochronous DATA from the USB device.
  • USB host stops to send isochronous IN, the last remaining DATA packets are dropped.
  • An isochronous OUT transaction is delivered to the USB downstream port without NAK.
  • the inter-packet delay between OUT and DATA should be maintained by buffering OUT until DATA is available in the USB downstream port.
  • the USB upstream port should know which USB address and USB endpoint are used for isochronous transfer. To obtain this information, DiiVA USB should have the capability to decode the descriptor from the USB device.
  • Decoding descriptor can be done by analyzing the hybrid link USB packet, or the USB downstream port may have USB Host capability to enumerate and read out the descriptor from the USB device before connecting a USB upstream port to a USB downstream port.
  • the descriptor decoding method is implementation-dependent and other implementations are possible.
  • DiiVA USB supports high bandwidth isochronous IN endpoints by the following method: only the first isochronous IN per micro frame is delivered.
  • the USB downstream port receives the DATA for isochronous IN, it itself should decide how many INs need to be sent based on the DATA PID. If first Data PID is DATA0, the USB downstream port behaves like above pipelined isochronous transfer scheme. If the first Data PID is DATA2, the USB downstream port generates two more same INs in the same micro frame. If the first Data PID is DATA1, the USB downstream port generates one more same IN.
  • the USB upstream port should have enough buffer to accommodate the maximum DATA size per frame in high bandwidth isochronous endpoint.
  • a method of delivering USB data through a hybrid link with an isochronous IN token may comprise the following acts:
  • an upstream port responding with one or more zero data packets
  • USB host stops sending isochronous IN packets, dropping the last and remaining DATA;
  • the upstream USB port finding out which endpoint and address are used for isochronous endpoint, by monitoring and decoding USB descriptor from DATA packet stream.
  • a method of delivering USB data through a hybrid link with an isochronous OUT token may comprise:
  • the upstream USB port finding out which endpoint and address are used for isochronous endpoint by monitoring and decoding USB descriptor from DATA packet stream.
  • non-isochronous transfers of USB data may also be performed using DiiVA specific protocols.
  • USB data may be delivered with a non-isochronous IN token, by performing the following acts:
  • USB device sends a DATA0 or aDATA1 packet and the DATA0 or the DATA1 packet arrives in upstream USB port, the downstream port responding with an ACK packet and delivers the DATA0 or the DATA1 packet to the upstream port;
  • the upstream port sending the DATA0 or DATA1 packet for the next available IN packet.
  • USB data may be delivered with a non-isochronous OUT token, by performing the following acts:
  • an upstream USB port receiving an OUT packet and either a DATA0 or a DATA1 packet and delivering to a downstream USB port;
  • the downstream USB port buffering the OUT packet until the DATA0 or the DATA1 packet is available, and when the DATA0 or the DATA1 packet is available, sending the OUT packet and the DATA0 or the DATA1 packet to a USB device;
  • the upstream USB port sending a NAK packet for the OUT transaction and not delivering the next incoming OUT packet and DATA0 or DATA1 packet until the response from downstream USB port is available;
  • USB device sends a NAK packet for the OUT transaction and downstream USB port sends a NAK packet to the upstream USB port, the upstream USB port delivering the next incoming OUT packet and the DATA0 or DATA1 packet to the downstream port again;
  • the upstream port sending ACK for the next OUT transaction.
  • transfer of USB data may be performed using PING packets.
  • PING protocol is implemented when the USB host gets NAK for OUT transaction.
  • the USB upstream port responds with NAK and does not deliver the PING packet to the USB downstream port.
  • the USB upstream port blocks PING and keeps sending NAK until the response for OUT transaction from the USB device is available.
  • the USB upstream port responds with ACK for the next PING and also responds with ACK for next OUT transaction. This last OUT transaction is not delivered to the USB downstream port because the USB device already accepted the first OUT transaction.
  • the USB upstream port delivers the next PING to the USB downstream port.
  • the USB upstream module responds with ACK for next PING and responds with ACK for next OUT transaction. This last OUT transaction is delivered to the USB device and is expected to be responded with ACK.
  • the USB upstream port responds with NAK for next PING and PING is delivered to the USB device again. This step is repeated until the USB device responds with ACK for PING. And the scenario follows the above step when the USB device responds with ACK.
  • a method of delivering data through a hybrid link using a USB PING packet may comprise:
  • an upstream USB port responds with NAK packet to OUT transaction
  • the upstream USB port not delivering PING packet, and continuing to send NAK packet until the response from USB device is available;
  • a USB device responds with ACK packet for OUT transaction, the upstream USB port responding with ACK packet for the next incoming PING packet and responding with ACK packet for the next OUT transaction; wherein the last OUT transaction is not delivered to the downstream USB port;
  • the USB device if the USB device responds with NAK packet for OUT transaction and NAK packet is delivered to upstream USB port, the upstream USB port delivering next PING packet to the downstream USB port;
  • the upstream USB port delivering the next PING packet to the downstream USB port;
  • USB device responds with ACK packet with PING packet and ACK packet is delivered to upstream USB port, the upstream USB port responding with ACK packet for next PING packet;
  • PING is used without a preceding OUT transaction.
  • the USB upstream port responds with NAK and delivers PING to the USB downstream port.
  • the USB upstream port does not deliver PING and keeps sending NAK until the response from the USB device is available.
  • the USB upstream port responds with ACK for next PING and also responds with ACK for next OUT transaction.
  • this last OUT transaction is delivered to the USB downstream port unlike the first scenario because no OUT transaction is delivered to the USB device yet.
  • USB upstream port responds with NAK for next PING and delivers PING to the USB downstream port. This step is repeated until the USB downstream port gets ACK from the USB device.
  • the acts when USB device responds with ACK, as described above, are then followed.
  • the DiiVA USB module When the USB device responds with NYET for OUT Transaction, the DiiVA USB module considers NYET as ACK and the USB upstream port always sends ACK instead of NYET.
  • a method of delivering data through a hybrid link using a USB PING packet may comprise:
  • the upstream USB port not delivering PING packet and continuing to send NAK packet until response from USB device is available;
  • USB device responds with ACK packet for PING packet and ACK packet is delivered to upstream USB port, the upstream USB port responding with ACK packet for the next PING packet and responding with ACK for the next OUT transaction;
  • USB address management in a DiiVA network may be performed as follows.
  • a USB upstream port can be attached to any hub downstream port, and packets with various USB addresses can be broadcasted to the USB upstream port.
  • the USB upstream port should be able to recognize which USB address is assigned to the USB upstream port and it should not respond to generic USB packets for any other USB Device.
  • USB upstream port accepts only generic USB packet with USB Address 0.
  • USB upstream port recognizes which USB address is assigned to the USB device in the USB downstream port.
  • USB upstream port After detecting SET_ADDRESS standard USB Device request, the USB upstream port only responds with generic USB packets with the newly assigned USB address. If USB Reset is detected in the USB upstream port, it resets the assigned USB address to 0 and waits for SET_ADDRESS standard USB device request again. Decoding SET_ADDRESS Device request is implementation specific.
  • a method of USB address management in a DiiVA network may comprise:
  • the upstream port recognizing which USB address is assigned to the USB device in the downstream port by monitoring and decoding SET_ADDRESS standard USB device request;
  • the upstream port after detecting SET_ADDRESS standard USB device request, the upstream port only responding with packets with new USB address which is assigned with SET_ADDRESS standard USB device request;
  • USB Reset resetting the assigned USB address to 0 and waiting for SET_ADDRESS standard USB device request again.
  • Keep-Alive forwarding in a DiiVA network may be performed as follows.
  • the USB upstream port starts to monitor line state.
  • first toggling of line state is detected, it is considered as first Keep-Alive signaling.
  • the USB upstream port sets the internal timer for T_KEEP_ALIVE and when it is expired, it starts to monitor line state toggling again to detect Keep-Alive.
  • T_KEEP_ALIVE is set to 0.98 ms.
  • Keep-Alive signaling is delivered to USB Downstream Module through UU_KEEP_ALIVE.
  • a method of performing USB low speed Keep-Alive signaling in a DiiVA network may comprise:
  • the upstream USB port setting the internal timer for T_KEEP_ALIVE and when it is expired, the upstream USB port monitoring whether line state is toggling again, to detect Keep-Alive and deliver Keep Alive event packet to downstream USB port.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Information Transfer Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Small-Scale Networks (AREA)
US13/521,739 2010-01-12 2011-01-12 MULTI-MEDIA USB DATA TRANSFER OVER DIGITAL INTERACTION INTERFACE FOR VIDEO AND AUDIO (DiiVA) Abandoned US20130191570A1 (en)

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PCT/US2011/021031 WO2011088154A2 (fr) 2010-01-12 2011-01-12 Transfert de données usb multimédia sur une interface d'interaction numérique pour la vidéo et l'audio (diiva)

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JP2013517693A (ja) 2013-05-16
JP5789269B2 (ja) 2015-10-07
CN102835091A (zh) 2012-12-19
WO2011088153A2 (fr) 2011-07-21
EP2556631A2 (fr) 2013-02-13
WO2011088153A3 (fr) 2011-11-24
US20130191872A1 (en) 2013-07-25
KR20120135231A (ko) 2012-12-12
EP2556631A4 (fr) 2013-12-18
CN102835091B (zh) 2017-07-04
EP2556648A2 (fr) 2013-02-13
WO2011088154A2 (fr) 2011-07-21
US9398329B2 (en) 2016-07-19
CN102860030A (zh) 2013-01-02
KR101884255B1 (ko) 2018-08-01
EP2556648A4 (fr) 2013-12-11
KR20120123086A (ko) 2012-11-07
WO2011088154A3 (fr) 2011-12-01
JP2013517694A (ja) 2013-05-16
CN102860030B (zh) 2017-02-08
JP5663037B2 (ja) 2015-02-04

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