JP2011512738A - Method and system for wireless USB transfer of isochronous data using bulk data transfer type - Google Patents

Abstract

Methods and systems are provided for transferring data in a wireless USB system having a first USB enabled device and a second USB enabled device. The method includes providing first data having a first data transfer type, converting first data to second data having a second data transfer type, and the second data. Wirelessly transferring the second data from the first USB enabled device to the second USB enabled device using the transfer type, and transferring the wirelessly transferred second data to the first data Converting to third data having a type.
[Selection] Figure 1

Description

Reference to related applications

  This patent application claims priority based on US Provisional Application No. 61 / 026,969 dated February 7, 2008, entitled "Method and System for Wireless USB Transfer of Isochronous Data using Bulk Data Transfer Type" The US provisional application is assigned to the applicant of the present application and is expressly incorporated into the specification of the present application by reference.

  The Wired Universal Serial Bus (USB) specification supports four basic types of data transfer: control, bulk data, interrupt data, and isochronous data transfer. Control data transfers are used for bursty, aperiodic, host software initiated request / response communications, and are typically used for command / state operations. Bulk data transfer is a non-periodic, large packet burst communication that can typically use any available bandwidth and be delayed until bandwidth becomes available. Can also be used for data. For example, a printer that receives data in one large packet uses the bulk transfer data type. Interrupt data transfer is used for low frequency, limited latency communication. For example, devices such as a mouse or keyboard that send very little data will use the interrupt data transfer type. The isochronous data transfer type, also known as streaming real-time transfer, is used for periodic, continuous communication between the host and the device and is typically used for time-related information. The Streaming devices such as audio speakers use the isochronous data transfer type.

  The Wireless Universal Serial Bus (WUSB) specification includes a description and specification of a device known as a wire adapter. These devices are wired or wireless USB adapters that allow “traditional” wired USB hosts and devices to be interconnected with WUSB devices in an extended USB system that includes both wired and wireless links. is there. There are two types of wire adapters. These are the host wire adapter (HWA) and device wire adapter (DWA), which work together. The HWA has a wired “upstream” USB port and a wireless “downstream” WUSB port that allow a wired USB host to communicate with the WUSB device. The DWA has a wireless “upstream” WUSB port and one or more wired “downstream” USB ports that allow the wired USB device to communicate with the WUSB host. Thus, WUSB systems with “traditional” wired USB hosts and devices employ HWA and DWA.

  The WUSB specification supports the same data transfer types as wired USB. In particular, WUSB supports control, bulk data, interrupt data, and isochronous data transfer types. WUSB bulk data transfer maintains its simplicity from wired USB bulk data transfer. However, due to the nature of wireless communication, WUSB isochronous data transfer requires additional complexity compared to wired USB isochronous data transfer. Accordingly, it would be desirable to have a method and system for providing isochronous data transfer to “traditional” wired USB devices using bulk transfer over a wireless USB link.

  Methods and systems are provided for transferring data in a WUSB system having a first USB enabled device and a second USB enabled device. The method includes providing first data having a first data transfer type, converting the first data to second data having a second data transfer type, and the second data Wirelessly transferring the second data from the first USB enabled device to the second USB enabled device using a data transfer type; and the wirelessly transferred second data Converting to third data having the first data transfer type.

  The system comprises a first conversion module configured to convert the first data having the first data transfer type into second data having a second data transfer type; and the first And a first USB compatible device including a first transceiver suitable for wirelessly transferring data from the first USB compatible device to the second USB. The system includes a second conversion module configured to convert the wirelessly transferred second data to third data having the first data transfer type; and the first USB And a second USB-compatible device including a second transceiver suitable for wirelessly receiving the second data from a compatible device.

  Certain embodiments provide a method for transferring data. The method generally includes embedding a plurality of equal data packets within the bulk data packet and wirelessly transferring the bulk data packet.

  Certain embodiments provide a method for transferring data. The method includes receiving a bulk data packet, extracting an isochronous data packet from the bulk data packet, and transferring the isochronous data packet to a universal serial bus (USB) compatible device. And generally.

  Certain embodiments provide an apparatus for transferring data. The apparatus generally includes a conversion device for embedding a plurality of isochronous data packets within a bulk data packet, and a transmitter for wirelessly transferring the bulk data packet.

  Certain embodiments provide an apparatus for transferring data. The device includes a receiver for receiving a bulk data packet, a conversion device for extracting an isochronous data packet from the bulk data packet, and a universal serial bus (USB) compatible with the isochronous data packet. And a transmitter for forwarding to other devices.

  Certain embodiments provide an apparatus for transferring data. The apparatus generally includes means for embedding a plurality of isochronous data packets within the bulk data packet and means for wirelessly transferring the bulk data packet.

  Certain embodiments provide an apparatus for transferring data. The apparatus includes: means for receiving a bulk data packet; means for extracting an isochronous data packet from the bulk data packet; and the isochronous data packet to a universal serial bus (USB) compatible device. And generally means for transferring.

  One embodiment transfers data comprising a computer readable medium encoded with instructions executable to embed a plurality of isochronous data packets within a bulk data packet and transfer the bulk data packet wirelessly To provide computer program products.

  An embodiment is executable to receive a bulk data packet, extract an isochronous data packet from the bulk data packet, and forward the isochronous data packet to a universal serial bus (USB) compatible device. A computer program product for transferring data comprising a computer readable medium encoded with a simple instruction is provided.

  Certain embodiments provide a wireless adapter. The wireless adapter includes an antenna, a converter for embedding a plurality of isochronous data packets in the bulk data packet, and a transmitter for wirelessly transferring the bulk data packet using the antenna. In general.

  Certain embodiments provide a wireless adapter. The wireless adapter includes an antenna, a receiver for receiving a bulk data packet via the antenna, a conversion device for extracting an isochronous data packet from the bulk data packet, and the isochronous data packet And a transmitter for transferring to a universal serial bus (USB) compatible device.

The present disclosure is best understood from the following detailed description when read in conjunction with the accompanying drawings. It is emphasized that according to standard practice in industry, the various features are not drawn to scale. Indeed, the dimensions of the various features may be arbitrarily expanded or reduced for clarity of discussion. Further, not all features may be shown in all figures for simplicity.
FIG. 1 is a diagram of a system in which the embodiments disclosed herein can be implemented. FIG. 2 is a diagram of transferred data that can be implemented in the WUSB system of FIG. FIG. 3 is a flowchart illustrating a data transfer method that can be implemented in the WUSB system of FIG. FIG. 4 is a flowchart of a data conversion method that can be implemented in the method of FIG. FIG. 5 is a flowchart of an alternative method for data conversion that may be implemented in the method of FIG. FIG. 6A illustrates an example of isochronous data transfer and corresponding bulk data transfer, respectively, in accordance with certain aspects of the present disclosure. FIG. 6B illustrates an example of isochronous data transfer and corresponding bulk data transfer, respectively, in accordance with certain aspects of the present disclosure. FIG. 7 illustrates an example of operations for isochronous (output) data transfer from a host to a device via wireless USB bulk data transfer in accordance with certain aspects of the present disclosure. FIG. 8 illustrates a diagram of isochronous (output) data transfer from a host to a device with wireless USB bulk data transfer in accordance with certain aspects of the present disclosure. FIG. 9 illustrates an example of operations for isochronous (input) data transfer from a device to a host via wireless USB bulk data transfer in accordance with certain aspects of the present disclosure. FIG. 10 illustrates a diagram of isochronous (input) data transfer from a host to a device with wireless USB bulk data transfer in accordance with certain aspects of the present disclosure.

Detailed Description of the Invention

  Various aspects of the invention are described more fully hereinafter with reference to the accompanying drawings. However, the present invention can be embodied in many different forms and should not be construed as limited to any particular structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Based on the teachings herein, one of ordinary skill in the art will recognize whether the scope of the invention is implemented or combined independently of any other aspect of the invention, as disclosed herein. It should be appreciated that it is intended to cover any aspect of the invention. For example, an apparatus or method may be implemented or performed using any number of aspects described herein. In addition, the scope of the invention is such that it is implemented in addition to or using other structures, functionality, or structures and functionality in addition to the various aspects of the invention described herein. It is intended to cover the apparatus or method. It should be understood that any aspect of the invention disclosed herein can be embodied by one or more elements of a claim.

  The word “exemplary” is used herein to mean “providing an example, instance, or illustration”. Any aspect described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other aspects.

  The present disclosure generally relates to the transfer of isochronous data using the bulk data transfer type in a wireless USB (WUSB) system. However, it is understood that the following disclosure provides many different embodiments, or examples, for implementing different features of the present disclosure. To simplify the present disclosure, specific examples of components and arrays are described below. Of course, these are merely examples and are not intended to be limiting. In addition, the present disclosure may repeat reference numerals and / or letters in various examples. This repetition is for simplicity and clarity and does not in itself define the relationship between the various disclosed embodiments and / or configurations.

  With reference to FIG. 1, system 100 is an example of a WUSB system that may benefit from one or more embodiments of the present disclosure. The system 100 includes a USB enabled host device 110 such as a computer or laptop having at least one USB port. The host 110 is connected to a host wire adapter (HWA) 112 through a USB port. The host 110 and the HWA 112 communicate over the USB wire 114. The HWA 112 provides WUSB functionality to the host 110.

  The host 110 includes an HWA driver 116 that provides software that facilitates communication requiring the HWA 112. HWA 112 includes a wireless transceiver 118. The HWA 112 uses a transceiver 118 for communicating wirelessly with a device wire adapter (DWA) 120 over a wireless link 122. The HWA 112 communicates with the DWA 120 using the WUSB protocol. The wireless link 122 is established over an ultra wideband (UWB) spectrum.

  Those skilled in the art will recognize that separate components can be utilized for transmitting (eg, a transmitter) and receiving (eg, a receiver) rather than utilizing a transceiver. .

  Host 110 further includes a DWA driver 124 that facilitates communications requiring DWA 120. The DWA 120 has a wireless transceiver 126 that is used to communicate with the HWA 112 via the HWA transceiver 118. The DWA 120 is connected to a USB compatible isochronous device 128 such as a USB audio speaker. Isochronous device 128 and DWA 120 include isochronous endpoints 132 and 134, respectively. Isochronous endpoints 132 and 134 facilitate isochronous transfer between DWA 120 and isochronous device 128. The DWA 120 further includes an isochronous scheduler 136 that facilitates isochronous transfer from the DWA 120 to the isochronous device 128. In particular, scheduler 136 delivers isochronous data transfers in a time-based manner.

  Referring also to FIG. 2, a diagram illustrating data transferred according to an embodiment is illustrated. For example, the drawing 200 can be implemented in the WUSB system 100 of FIG. Similar features in FIGS. 1 and 2 are numbered the same for clarity. Initially, the DWA driver 124 recognizes and enumerates the USB isochronous device 128. Therefore, the DWA driver 124 maps the wire adapter remote pipe declared as isochronous transfer type to the isochronous endpoint 132 of the DWA 120 associated with the USB isochronous device 128. In addition, the DWA 120 sets the isochronous endpoint 134 on the DWA 120 as an isochronous scheduled endpoint.

  A USB-compatible host device 110 such as a laptop can request isochronous data transfer 210 from a USB-compatible isochronous device 128. When the host 110 makes an isochronous data transfer request, an isochronous data transfer having an isochronous data transfer type 210 is provided to the DWA driver 124. The isochronous data transfer 210 includes an isochronous data packet 212. The DWA driver 124 converts the isochronous data packet 212 into isochronous data having a bulk data transfer type 214.

  The DWA driver 124 determines the packet length 216 corresponding to each isochronous data packet 212. Next, the DWA driver 124 combines the packet length 216 and the isochronous data packet 212. The resulting data is isochronous data with bulk data transfer type 214. In the embodiment of the present disclosure, the combination of the packet length 216 and the corresponding isochronous data packet 212 is a concatenation of the packet length 216 and the corresponding isochronous data packet 212.

  This concatenation is repeated iteratively for each isochronous data packet 212 in isochronous data transfer 210. In certain embodiments, in accordance with the present disclosure, DWA driver 124 combines packet length 216 and isochronous data packet 212 in such a way that each packet length precedes the corresponding isochronous data packet. Isochronous data having a bulk transfer type 214 is provided to the HWA driver 116 for distribution to the HWA 112.

  The HWA 112 then wirelessly transfers the isochronous data 214 to the DWA 120 over the UWB link 122 using bulk data transfer. After the DWA 120 receives the isochronous data 214, the DWA 120 converts the data 214 back into an isochronous data packet 212, making the data packet 212 suitable for delivery to the USB compatible isochronous device 128.

  In one embodiment of the present disclosure, DWA 120 understands that isochronous data having bulk data transfer type 214 is a bulk transfer of aggregated isochronous data packets 212. Thus, DWA 120 separates isochronous data packet 212 from isochronous data having bulk data transfer type 214. The DWA 120 measures the delivery of the isochronous data packet 212 based on the isochronous scheduler 136 by delivering the resulting isochronous data packet 212 to the isochronous endpoint 134 on the DWA 120. In accordance with an embodiment, scheduler 136 can meter the delivery of isochronous data packets according to quality of service and / or traffic parameters defined by the isochronous endpoint to which the data is directed.

  In particular, DWA 120 separates the original isochronous data packet 212 from the isochronous data transfer having bulk data transfer type 214. After the DWA 120 completes the conversion of the received isochronous data 214 into the isochronous data packet 212, the DWA 120 can deliver the original isochronous data packet 212 to the USB compatible isochronous device 128.

  Referring also to FIG. 3, there is illustrated a flowchart diagram of a method 300 for wirelessly transferring data according to an embodiment that may be implemented in the system 100 of FIG. According to one embodiment, the operations of FIG. 3 perform USB bulk data transfer operations as if they were transferred using an isochronous data transfer operation with a direct (wired) link between the host and the device. It can be used to wirelessly transfer data between the host and USB device.

  FIG. 6 illustrates an example diagram of packet exchange between a host device and a USB enabled device over a wireless link between HWA and DWA. The example diagram of the packet exchange may correspond to the operations illustrated in FIG.

  The method 300 begins at block 310 and provides first data (eg, isochronous data) having a first data transfer type (eg, isochronous data transfer type). At block 320, the method 300 continues with converting the first data to second data (eg, isochronous data) having a second data transfer type (eg, bulk transfer type). The method 300 continues at block 330 and uses the second data transfer type to transfer the second data from the first USB enabled device (eg, HWA) to the second USB enabled device (eg, DWA). Transfer to wireless. Method 300 continues while converting wirelessly transferred second data to third data (eg, isochronous data) having a first data transfer type.

  Referring also to FIG. 4, a flowchart of a data conversion method that can be used in block 320 of FIG. 3 is illustrated. The method begins at block 410 to determine an isochronous data packet length corresponding to each of the plurality of isochronous data packets. The method continues at block 420 and combines the isochronous data packet length and the plurality of isochronous data packets such that each isochronous data packet length precedes the corresponding isochronous data packet.

  Referring also to FIG. 5, a flowchart diagram illustrating a data conversion method that can be used in block 340 of FIG. 3 is illustrated. The method includes separating a plurality of isochronous data packets from second data (eg, isochronous data having a bulk transfer type).

  In an alternative embodiment, referring again to FIG. 2, isochronous data with bulk data transfer type 214 can be marked with a higher priority, faster than other data transfer types in WUSB. Encourage them to deliver. For example, the bulk data transfer 218 illustrated in FIG. 2 is provided to the DWA driver 124. As discussed above, isochronous data transfer with isochronous data transfer type 210 is also provided to DWA driver 124. After converting isochronous data transfer 210 to isochronous data with bulk data transfer type 214, DWA driver 124 transfers other data to the resulting isochronous data 214 for distribution in WUSB data transfer 200. Mark higher priority than type. Both bulk data 220 and isochronous data with bulk data transfer type 214 are provided to HWA driver 116. The HWA driver 116 recognizes the priority of the isochronous data 214 and, as a result, prompts the isochronous data having the bulk data transfer type 214 to be distributed to the DWA 120 before the bulk data 220.

  According to certain embodiments, a wire adapter (eg, DWA driver 124 and / or HWA driver 116) may ensure that bulk data including isochronous data is given higher priority than other bulk data. it can. For example, when using a wire adapter, the wire adapter driver can implement a scheduling function to determine which traffic is scheduled next. Thus, during this scheduling, the wire adapter driver can implement prioritization by scheduling bulk data packets containing isochronous data to be forwarded before other bulk data.

  In accordance with certain embodiments, bulk data packets containing isochronous data can be given higher priority by inserting them into a high priority queue provided before other queues. In accordance with certain embodiments, in order to provide further assurance for prioritization, the WUSB host may also allow prioritization of bulk data packets containing isochronous data in its scheduling algorithm.

  In accordance with certain embodiments, queue priority may be achieved by actually delaying transfers from one or more queues. For example, (normal) bulk data queues (used to transfer bulk data that does not contain isochronous data packets) should not be transferred from time to time by monitoring memory usage in the DWA and / or HWA . When memory usage is detected, the bulk data queue can be delayed for the transfer of bulk data packets (potentially smaller bulk data packets containing isochronous data) from the high priority queue. Free up bandwidth.

  Certain types of data transfers may not be rearranged or split. Thus, for certain embodiments, the DWA driver can collect isochronous data payloads without bypassing any data packets in the bulk data queue (eg, bypassing results in splitting). . For example, in some cases, if a bulk data queue has previously sent a transfer request header for a DWA-initiated data packet, the transaction will be sent from its data payload according to the wire adapter protocol. May not be divided into DWAs. Thus, in such a case, two markers can be used to send a packet from the DWA driver to the HWA driver. These are a first marker to indicate priority and a second marker to indicate the ability to split.

  According to an embodiment, all bulk data transfers sent to the HWA driver can have an I / O request packet (IRP) that includes context information for bulk data transfer. In accordance with an embodiment, certain fields in the IRP that are reserved for use as priority fields can be set to indicate high priority for bulk data transfers involving isochronous data packets.

  An alternative embodiment of the present disclosure can include a WUSB system as illustrated in FIG. 1, which has a USB enabled isochronous device that is an audio microphone. Other embodiments may include USB enabled devices that support streaming real-time data transfer. Additionally, in an alternative embodiment, the USB enabled host 110 in the WUSB system illustrated in FIG. 1 can optionally include a native WUSB enabled host, thus eliminating the need for the HWA 112. Can do. Further, in another alternative embodiment in accordance with the present disclosure, the USB-compatible isochronous device 128 of the WUSB system 100 illustrated in FIG. 1 includes a native WUSB-compatible isochronous device, thus requiring the DWA 120. Sex can be lost.

  Further, in another alternative embodiment, the UWB system 100 of FIG. 1 uses isochronous data transfer with the DWA 120 as a signal source and uses bulk data transfer to transfer isochronous data to the HWA 112 wirelessly. Supports isochronous data transfer.

As noted in the packet conversion example , due to the nature of wireless communication, WUSB isochronous data transfer may require additional complexity compared to wired USB isochronous data transfer. However, certain embodiments of the present disclosure may enable isochronous data transfer between a host and a USB device using a wireless USB bulk data transfer operation.

  Using the technology presented herein, wireless USB bulk data transfer is host-to-USB compatible as if the host and USB-compatible isochronous device were connected directly via a wired USB connection. Can be used to achieve isochronous data transfer to and from other isochronous devices.

  As described above, in certain embodiments, when preparing to convert data from an isochronous transfer type to a bulk data transfer type, the data packet length is determined by their respective isochronous data packets in the bulk data stream. Can be concatenated with. Isochronous data packets and their respective lengths can then be transferred utilizing wireless USB bulk data transfer. When receiving a bulk data transfer comprising an isochronous data packet embedded in the bulk data transfer, the data packet length may allow the receiving entity to extract the corresponding isochronous data packet. For example, the receiving entity can read the data packet length and can read the sub-sequential number of bytes of the corresponding data packet.

  6A and 6B illustrate how an isochronous data packet can be converted into a data packet suitable for bulk data transfer. FIG. 6A illustrates an isochronous data transfer 210 of the data packet 212. As illustrated, each data packet 212 has a corresponding length L (eg, data packet D1 has length L1, data packet D2 has length L2, etc.). The data packet can be forwarded to the host wire adapter using, for example, normal isochronous data transfer with an output token preceding the data packet (D1 to DN). The length of each data packet may change due to isochronous data transfer.

  As illustrated in FIG. 6B, the isochronous data packet 212 (D1 to DN) can be converted to a bulk data stream 214 comprising a data packet length 216 concatenated with the isochronous data packet 212.

The isochronous data packet 212 can then be transferred by bulk data transfer of the packet (eg, D1 ′). With bulk data transfer, the maximum data packet length (L _MAX ) can be used for each transfer when possible. A packet smaller than the maximum data packet length can signal the end of bulk data transfer. Thus, the number of bulk data transfers required to transmit isochronous data packets 212 and their corresponding data packet lengths can vary depending on LMAX and the actual length of the various data packets 212.

  For certain embodiments, the receiving device may generate an ACK packet to confirm receipt of the bulk data transfer. However, to support the isochronous nature of data transfer, rules that require retransmission of packets with bit errors (eg, as indicated by a non-compliance with CRC) can be ignored, A packet or some part of a known packet (eg, corresponding to silence in audio or voice data transfer) can be processed anyway.

  As noted above, for certain embodiments, bulk data transfers involving isochronous data packets are performed at a rate sufficient for the data to meet the bandwidth and latency requirements negotiated between the host and the device. In an effort to ensure that it is transferred, it can be marked with a higher priority than other bulk data. According to an embodiment, all bulk data transfers sent to the HWA driver can have an I / O request packet (IRP) that includes context information for bulk data transfer. In accordance with an embodiment, certain fields in the IRP received for use as priority fields can be set to indicate high priority for bulk data transfers involving isochronous data packets. . Further, in some embodiments, other bulk data can be included in a bulk data transfer that includes an isochronous data packet. In such embodiments, any suitable technique can be utilized to distinguish between isochronous data packets and other bulk data packets.

  FIG. 7 illustrates an example of operations for isochronous (output) data transfer from a host to a device via wireless USB bulk data transfer in accordance with certain aspects of the present disclosure. The operations may be performed on a host device (eg, by a DWA driver, HWA driver, or HWA), operations 602-604, and on a USB enabled device (eg, by a DWA or DWA scheduler). Operations 612-616 are included.

  The operation begins at 602 and obtains an isochronous data packet. The isochronous data packet can be obtained, for example, by an isochronous device driver (which may be running on the DWA driver) that obtains the isochronous data packet from the application. Such an isochronous data packet may correspond to, for example, streaming audio (eg, a music player or telephony application) or video. At 604, the isochronous data packet and the data packet length are transferred using wireless USB bulk data transfer.

  At 612, a bulk data transfer is received, and at 614, isochronous data packets are extracted from the bulk data transfer using the data packet length. For example, the receiving device can read the data packet length, extract the number of subsequent corresponding bytes as an isochronous data packet, and repeat this process, thus repeating the remaining packets. At 616, the isochronous data packet is transferred to the device using (normal) wired USB isochronous data transfer.

  FIG. 8 illustrates a diagram of an example of isochronous (output) data transfer from a host to a device with a wireless USB bulk data transfer operation corresponding to the operation of FIG. As illustrated, isochronous data packet 212 stream 210 may be converted to isochronous data packet 212 and bulk data transfer stream 214 having a corresponding data packet length 216 concatenated with data packet 212. it can. The HWA 112 can transfer the bulk data transfer stream 214 to the DWA 120. In the DWA 120, the isochronous data packet 212 can be extracted and transferred to the USB compatible isochronous device 128. For example, the scheduler 136 of the DWA 120 illustrated in FIG. 1 can buffer isochronous data packets received by wireless USB bulk data transfer and forward them to the USB-enabled isochronous device 12 according to the agreed rate. can do.

  FIG. 9 illustrates an example of operations for isochronous (input) data transfer from a device to a host by wireless USB bulk data transfer according to certain aspects of the present disclosure. The operations may be performed on a USB enabled device (eg, by a DWA or DWA scheduler) operations 802-804, and operations may be performed on a host device (eg, by an HWA) 812-816. Can be implemented.

  The operation begins at 802 and transfers isochronous data packets using wired USB isochronous data transfer. At 804, the isochronous data packet and the data packet length are transferred using wireless USB bulk data transfer.

  At 812, a bulk data transfer is received, and at 814, an isochronous data packet is extracted from the bulk data transfer using the data packet length. At 816, the isochronous data packet is transferred to the device using (normal) wired USB isochronous data transfer.

  FIG. 10 illustrates an example of isochronous (output) data transfer from the device to the host by the wireless USB bulk data transfer operation corresponding to the operation of FIG. As illustrated, isochronous data packet 212 stream 210 from device 128 is converted to isochronous data packet 212 and bulk data transfer stream 214 having a data packet length 216 concatenated with isochronous data packet 212. Can. The DWA 120 can transfer the bulk data transfer stream 214 to the HWA 112. The HWA 112 can pass the bulk data transfer 214 to the HWA driver and DWA driver, for example, the DWA driver can extract the isochronous data packet 212 to be passed to the host 120. The isochronous data packet can be passed to the host 120 by a calculation method by a scheduler application, for example, buffering the isochronous data packet received by wireless USB bulk data transfer, and the isochronous data packet is sent to the host 120 according to the agreed rate -Data packets can be transferred.

  Although the embodiments of the present disclosure have been described in detail, the technician may make various changes, substitutions, and modifications in the present specification without departing from the spirit and scope of the present disclosure. You should understand what you can do. For example, although particular embodiments illustrate specific process steps or procedures, many alternative implementations are possible and may be made with simple design choices. Some process steps can be performed in a different order than the specific description herein, eg, based on function, purpose, criteria matching, conventional structure, user interface design, and the like. The embodiments disclosed herein are provided for UWB systems. However, implementations of the embodiments disclosed herein are not limited to any particular radio frequency system. There are also several advantages that differ from these and other embodiments. In addition to providing an effective and cost effective method and system for transferring isochronous data using bulk data transfer in a wireless USB system, the method and system disclosed herein includes a DWA And it can be easily implemented by modifying the device driver of DWA. Also, by converting isochronous data transfer to bulk data transfer type in the device driver, the need for extra endpoints and / or handling in the HWA can be eliminated. In addition, the DWA can meter its delivery synchronization independently of any other timing mechanism such as the start of frame synchronization at the USB level within itself.

  In accordance with an embodiment, the wire adapter can meter the transfer of isochronous data packets to the isochronous endpoint according to quality of service (QoS) and traffic parameters defined by the isochronous endpoint.

  Various operations of the methods described above may be performed by any suitable means capable of performing the corresponding function. Such means include, but are not limited to, various hardware and / or software components and / or modules, including circuits, application specific integrated circuits (ASICs), or processors. be able to. In general, for the operations illustrated in the drawings, the operations can be performed by corresponding number of means plus functional components with similar numbering. For example, blocks 300, 320, 340, 600, and 800 illustrated in FIGS. 3, 4, 5, 7, and 9, respectively, can be implemented by corresponding circuit blocks.

  As used herein, the term “determing” includes a wide variety of actions. For example, "determining" means calculating, computing, computing, processing, deriving, investigating, searching and investigating. It may include looking up (eg, a quick look, database or other data structure), ascertaining, and the like. Also, “determining” may include receiving (eg, receiving information), accessing (eg, accessing data in a memory) and the like. Good. Also, “determining” may include resolving, selecting, selecting, establishing, and the like.

  The various operations of the methods described above are any suitable means by which operations such as various hardware and / or software component (s), circuitry, and / or module (s) can be performed. Can be implemented. In general, any operation illustrated in the drawings may be performed by corresponding functional means capable of performing the operation.

  Various exemplary logic blocks, modules and circuits described in connection with the present disclosure and set forth in the following claims include general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), Designed to perform field programmable gate array signals (FPGA) or other programmable logic devices (PLD), discrete gate or transistor logic, discrete hardware components or functions described herein Can be implemented or implemented by any combination thereof. A general purpose processor may be a microprocessor, but in the alternative, the processor may be a commercially available processor, controller, microcontroller, or state machine. The processor is also implemented as a combination of computer computing devices (eg, a DSP and microprocessor combination, multiple microprocessors, one or more microprocessors combined with a DSP core, or any other such configuration). May be.

  The method or algorithm steps described in connection with the present disclosure may be directly embodied in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in any form of storage medium that is known in the art. Some examples of storage media that can be used are random access memory (RAM), read only memory (ROM), flash memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-RPM Etc. A software module can comprise a single instruction, or multiple instructions, and can be distributed in several different code segments, between different programs, and across multiple storage media. A storage medium may be coupled to the processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor.

  The methods disclosed herein comprise one or more steps or actions for achieving the described method. The method steps and / or actions may be interchanged without departing from the scope of the claims. In other words, unless a unique order or operation of steps is specified, the use of the order and / or unique steps and / or actions can be modified without departing from the scope of the claims.

  The described functionality may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions can be stored as one or more instructions on a computer-readable medium. A storage media may be any available media that can be accessed by a computer. By way of example and not limitation, such computer readable media may be RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage device, or Any other medium that can be used to carry or store the desired program code in the form of instructions or data structures that can be accessed by a computer can be provided. As used herein, discs (Disks and discs) are compact discs (CDs), laser discs (registered trademarks), optical discs, digital universal discs (DVDs), flexible discs, and discs optically by laser The disc includes a Blu-ray (registered trademark) disc that normally reproduces the data magnetically while reproducing the data.

  Thus, certain aspects may comprise a computer program product for performing the operations presented herein. For example, such a computer program product can comprise a computer-readable medium having stored (and / or encoded) instructions, which instructions perform the operations described herein. Executable by one or more processors for implementation. For certain aspects, the computer program product may include packaging material.

  Software or instructions can also be transmitted over a transmission medium. For example, if the software is a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or website, server, or other remote that uses wireless technologies such as infrared, wireless, and microwave If source, coaxial cables, fiber optic cables, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of transmission media.

  In addition, modules and / or other suitable means for performing the methods and techniques described herein may be downloaded by user terminals and / or base stations as applicable and / or so. Otherwise it can be acquired. For example, such a device can be coupled to a server to facilitate a transfer means for performing the methods described herein. Alternatively, the various methods described herein are stored such that the user terminal and / or base station can obtain various methods in coupling or providing storage means to the device. The medium can be provided via a medium (for example, a physical storage medium such as a RAM, a ROM, a compact disk (CD), or a flexible disk). Moreover, any other suitable technique for providing the devices with the methods and techniques described herein may be utilized.

  It is understood that the claims are not limited to the precise configuration and components illustrated above. Various modifications, changes and variations may be made in the arrangement, operation and detailed description of the methods and apparatus described above without departing from the scope of the claims.

Claims (58)

A method for transferring data in a wireless USB system having a first USB enabled device and a second USB enabled device, comprising:
Providing first data having a first data transfer type;
Converting the first data into second data having a second data transfer type;
Wirelessly transferring the second data from the first USB enabled device to the second USB enabled device using the second data transfer type; and the wirelessly transferred second Converting the second data into third data having the first data transfer type.   The method of claim 1, further comprising transferring the third data to a third USB enabled device using the first data transfer type. The method of claim 1, wherein the device supports audio.   The method of claim 1, further comprising prioritizing the second data to be wirelessly transferred before the fourth data.   The method of claim 1, wherein the providing the first data having the first data transfer type comprises providing the first data having an isochronous data transfer type.   5. The method of claim 4, wherein the converting the first data includes converting the first data to the second data having a bulk data transfer type. The first data includes a plurality of isochronous data packets, and the converting the first data into the second data includes:
Determining an isochronous data packet length corresponding to each of the plurality of isochronous data packets; and so that each isochronous data packet length precedes the corresponding each of the plurality of isochronous data packets. 5. The method of claim 4, comprising combining an isochronous data packet length and the plurality of isochronous data packets.   The method of claim 4, wherein the converting the second data into the third data includes separating the plurality of isochronous data packets from the second data.   8. The method of claim 7, further comprising delivering the plurality of isochronous data packets to an endpoint associated with the second USB enabled device, wherein the endpoint is the isochronous data. The method of claim 7, wherein the method supports a transfer type.   9. The method of claim 8, further comprising metering each of the plurality of isochronous data packets for transfer, wherein the metering is performed by an isochronous scheduler. The method described in 1. A wireless USB system for transferring data,
A first conversion module configured to convert first data having a first data transfer type into second data having a second data transfer type; and converting the second data to the first data A first USB enabled device comprising: a transmitter adapted to wirelessly transfer from one USB enabled device to the second USB;
A second conversion module configured to convert the wirelessly transferred second data to third data having the first data transfer type; and the second data to the first data And a receiver adapted to wirelessly receive from a USB compatible device of the second USB compatible device. The first data includes a plurality of first data packets, and the first conversion module configured to perform conversion includes:
Determining a data packet length corresponding to each of the plurality of first data packets;
The system of claim 10, wherein the system is configured to combine the data packet length and the plurality of first data packets to form the second data.   The combination of the data packet length and the plurality of first data packets is such that each of the plurality of first data packet lengths precedes each corresponding one of the plurality of first data packets. 12. The system of claim 11, wherein: The first data transfer type includes an isochronous data transfer type,
The second data transfer type includes a bulk data transfer type, and the second conversion module configured to perform conversion separates the plurality of first data packets from the second data The system of claim 10, wherein the system is configured to: The first USB compatible device includes a USB compatible host device;
11. The system of claim 10, wherein the second USB enabled device includes a host wire adapter, and the third USB enabled device includes a device wire adapter.   11. The system of claim 10, wherein the USB enabled host device includes a module configured to prioritize the second data to be transferred wirelessly before fourth data. A method for transferring data comprising:
Embedding a plurality of isochronous data packets in the bulk data packet; and wirelessly transferring the bulk data packet.   The method of claim 16, further comprising receiving the isochronous data packet transferred using a universal serial bus (USB) isochronous data transfer protocol.   17. The method of claim 16, wherein transferring the bulk data packet wirelessly comprises transferring the bulk data packet using a universal serial bus (USB) bulk data transfer protocol.   17. The method of claim 16, further comprising prioritizing the bulk data packet that includes the isochronous data packet to be transmitted wirelessly before other bulk data packets. Prioritizing the bulk data packet including the isochronous data packet to be transmitted wirelessly before other bulk data packets is
20. The method of claim 19, comprising writing the isochronous data packet to a high priority buffer to which data is being transferred with a higher priority than a low priority buffer. Prioritizing the bulk data packet containing the isochronous data packet to be transferred wirelessly before other bulk data packets is
20. The method of claim 19, comprising setting a priority field in an input / output request packet (IRP) to a value indicating high priority. Embedding multiple isochronous USB data transfer type isochronous data packets in a universal serial bus (USB) bulk data transfer type bulk data packet
17. The method of claim 16, comprising: determining an isochronous data packet length corresponding to each of the plurality of isochronous data packets; and including the isochronous data packet length in the bulk data packet. . A method for transferring data comprising:
Receiving a bulk data packet;
Extracting the isochronous data packet from the bulk data packet; and transferring the isochronous data packet to a universal serial bus (USB) compatible device.   To transfer the isochronous data packet to the universal serial bus (USB) compatible device, the isochronous data packet is transferred using a universal serial bus (USB) isochronous data transfer protocol. 24. The method of claim 23, comprising:   24. The method of claim 23, wherein receiving the bulk data packet comprises receiving the bulk data packet that is transferred using a universal serial bus (USB) bulk data transfer protocol.   24. The method of claim 23, further comprising weighing each of the plurality of isochronous data packets for transfer to the universal serial bus (USB) enabled device.   24. The method of claim 23, wherein the metering is performed according to quality of service (QoS) and traffic parameters defined by an isochronous endpoint to which the isochronous data packet is forwarded. Extracting isochronous data packets from the bulk data packets
Obtaining the length of each isochronous data packet from the bulk data packet and extracting the number of bytes of each isochronous data packet corresponding to the length obtained for each isochronous data packet 24. The method of claim 23, comprising: A device for transferring data,
An apparatus comprising: a conversion device for embedding a plurality of isochronous data packets in a bulk data packet; and a transmitter for wirelessly transferring the bulk data packet.   30. The apparatus of claim 28, further comprising a receiver for receiving the isochronous data packet transmitted using a universal serial bus (USB) isochronous data transfer protocol.   The transmitter is configured to wirelessly transfer the bulk data packet and comprises transferring the bulk data packet using a universal serial bus (USB) bulk data transfer protocol. Item 28. The apparatus according to Item 28.   29. The apparatus of claim 28, wherein the conversion apparatus is configured to prioritize the bulk data packet having the isochronous data packet to be wirelessly transferred before other bulk data packets. The converter is
By writing the isochronous data packet to the high priority buffer to which data is transferred with higher priority than the low priority buffer, the bulk data packet including the isochronous data packet is transferred to other bulk data. 32. The apparatus of claim 31, wherein the apparatus is configured to prioritize for wireless transfer prior to a packet. The converter is
By setting the priority field in the input / output request packet (IRP) to a value indicating high priority, the bulk data packet including the isochronous data packet is transmitted wirelessly before other bulk data packets. 32. The device of claim 31, wherein the device is configured to be prioritized. The converter is
30. The apparatus of claim 28, configured to determine an isochronous data packet length corresponding to each of the plurality of isochronous data packets and to include the isochronous data packet length in the bulk data packet. A device for transferring data,
A receiver for receiving bulk data packets;
An apparatus comprising: a conversion device for extracting an isochronous data packet from the bulk data packet; and a transmitter for transferring the isochronous data packet to a universal serial bus (USB) compatible device.   36. The apparatus of claim 35, wherein the transmitter is configured to transfer the isochronous data packet using a universal serial bus (USB) isochronous data transfer protocol.   36. The apparatus of claim 35, wherein the receiver is configured to receive bulk data packets transferred using a universal serial bus (USB) bulk data transfer protocol.   36. The apparatus of claim 35, wherein the transmitter is configured to meter each of the plurality of isochronous data packets for transfer to the universal serial bus (USB) enabled device.   The transmitter measures each of the plurality of isochronous data packets according to quality of service (QoS) and traffic parameters defined by an isochronous endpoint to which the isochronous data packets are transferred. 40. The apparatus of claim 38, wherein the apparatus is configured. The converter is
Configured to obtain the length of each isochronous data packet from the bulk data packet and to extract the number of bytes of each isochronous data packet corresponding to the length obtained for each isochronous data packet 32. The apparatus of claim 31, wherein: A device for transferring data,
An apparatus comprising: means for embedding a plurality of isochronous data packets in a bulk data packet; and means for wirelessly transferring said bulk data packet.   42. The apparatus of claim 41, further comprising means for receiving the isochronous data packet transmitted using a universal serial bus (USB) isochronous data transfer protocol.   The means for transferring wirelessly is configured to transfer the bulk data packet wirelessly and transmitting the bulk data packet using a universal serial bus (USB) bulk data transfer protocol; 42. The apparatus of claim 41, comprising:   42. The apparatus of claim 41, wherein the means for embedding is configured to prioritize the bulk data packet containing the isochronous data packet to be forwarded wirelessly before other bulk data packets. The means for embedding is
By writing the isochronous data packet to the high priority buffer to which data is transferred with higher priority than the low priority buffer, the bulk data packet including the isochronous data packet is transferred to other bulk data. 45. The apparatus of claim 44, wherein the apparatus is configured to prioritize for wireless transmission prior to a packet. The means for embedding is
By setting the priority field in the input / output request packet (IRP) to a value indicating high priority, the bulk data packet including the isochronous data packet is transmitted wirelessly before other bulk data packets. 45. The apparatus of claim 44, wherein the apparatus is configured to be prioritized. The means for embedding is configured to determine an isochronous data packet length corresponding to each of the plurality of isochronous data packets, and to include the isochronous data packet length in the bulk data packet. Item 42. The apparatus according to Item 41. A device for transferring data,
Means for receiving a bulk data packet;
An apparatus comprising: means for extracting an isochronous data packet from the bulk data packet; and means for transferring the isochronous data packet to a universal serial bus (USB) compatible device.   49. The apparatus of claim 48, wherein the means for transferring is configured to transfer the isochronous data packet using a universal serial bus (USB) isochronous data transfer protocol.   49. The apparatus of claim 48, wherein the means for receiving is configured to receive a bulk data packet that is transferred using a universal serial bus (USB) bulk data transfer protocol.   49. The means of claim 48, wherein the means for transferring is configured to meter each of the plurality of isochronous data packets for transfer to the universal serial bus (USB) enabled device. apparatus.   The means for forwarding measures each of the plurality of isochronous data packets according to quality of service (QoS) and traffic parameters defined by the isochronous endpoint to which the isochronous data packets are forwarded. 52. The apparatus of claim 51, wherein the apparatus is configured to: The means for extracting obtains the length of each isochronous data packet from the bulk data packet, and the bytes of each isochronous data packet corresponding to the length obtained for each isochronous data packet 49. The apparatus of claim 48, configured to extract the number of. A computer program product for transferring data,
A computer program product comprising a computer readable medium encoded with instructions executable to embed a plurality of isochronous data packets in a bulk data packet and to transfer said bulk data packet wirelessly. A computer program product for transferring data,
Receive bulk data packets,
A computer readable medium encoded with instructions executable to extract an isochronous data packet from the bulk data packet and transfer the isochronous data packet to a universal serial bus (USB) compatible device Computer program product to do. A wireless adapter,
An antenna,
A wireless adapter comprising: a converter for embedding a plurality of isochronous data packets in a bulk data packet; and a transmitter for wirelessly transferring the bulk data packet using the antenna. A wireless adapter,
An antenna,
A receiver for receiving a bulk data packet via the antenna; a converter for extracting an isochronous data packet from the bulk data packet; and a device for universal serial bus (USB) said isochronous A wireless adapter comprising a transmitter for transferring data packets.

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