KR101188772B1 - Method and system for wireless usb transfer of isochronous data using bulk data transfer type - Google Patents

Abstract

A method and system are provided for transferring data in a wireless USB system having a first USB capable device and a second USB capable device. The method includes providing first data having a first data transmission type, converting the first data to second data having a second data transmission type, and using the first data transmission type. Wirelessly transmitting the second data from a USB capable device to the second USB capable device, and converting the wirelessly transmitted second data into third data having the first data transfer type. .

Description

TECHNICAL AND SYSTEM FOR WIRELESS USB TRANSFER OF ISOCHRONOUS DATA USING BULK DATA TRANSFER TYPE

This patent application claims priority to US Provisional Application No. 61 / 026,969, entitled "Method and System for Wireless USB Transer of Isochronous Data using Bulk Data Transfer Type," filed February 7, 2008 and assigned to the applicant. And are hereby expressly incorporated by reference.

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

Wireless Universal Serial Bus (WUSB) details include descriptions and details of devices known as Wire Adapters. These devices are "legacy" wired USB hosts and devices in extended USB systems that include both wireless and wired links, allowing wired USB-wireless USB to be interconnected with WUSB devices. USB-to-Wireless-USB adapters. There are two types of wired adapters, a host wired adapter (HWA) and a device wired adapter (DWA), which operate in conjunction with each other. HWAs have a wired "upstream" USB port and a wireless "downstream" WUSB port, allowing a wired USB host to communicate with WUSB devices. DWAs have a wireless "upstream" WUSB port and one or more wired "downstream" USB ports, enabling wired USB devices to communicate with a WUSB host. Thus, WUSB systems with "legacy" wired USB hosts and devices will use HWAs and DWAs.

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 communications, WUSB isochronous data transfer requires increased complexity in addition to wired USB isochronous data transfer. Thus, it would be desirable to have a method and system for providing isochronous data transfers to "legacy" wired USB devices using bulk transfers on a wireless USB link.

A method and system are provided for transferring data in a WUSB system having a first USB capable device and a second USB capable device. The method includes providing first data having a first data transmission type, converting the first data to second data having a second data transmission type, and using the first data transmission type. Wirelessly transmitting the second data from a USB capable device to the second USB capable device, and converting the wirelessly transmitted second data into third data having the first data transfer type. .

The system includes a first USB capable device, the first USB capable device comprising: a first conversion module configured to convert first data having a first data transmission type into second data having a second data transmission type, And a transceiver adapted to wirelessly transfer the second data from the first USB capable device to a second USB. The system further includes a second USB capable device, wherein the second USB capable device is configured to convert the second data transmitted wirelessly into third data having the first data transfer type. A module, and a transceiver adapted to wirelessly receive the second data from the first USB capable device.

Certain embodiments provide a method for transmitting data. The method generally includes embedding a plurality of isochronous data packets into bulk data packets, and wirelessly transmitting the bulk data packets.

Certain embodiments provide a method for transmitting data. The method generally includes receiving bulk data packets, extracting isochronous data packets from the bulk data packets, and sending the isochronous data packets to a USB capable device.

Certain embodiments provide an apparatus for transmitting data. The apparatus generally includes a converter for embedding a plurality of isochronous data packets into bulk data packets, and a transmitter for wirelessly transmitting the bulk data packets.

Certain embodiments provide an apparatus for transmitting data. The apparatus generally includes a converter for embedding a plurality of isochronous data packets into bulk data packets, and a transmitter for wirelessly transmitting the bulk data packets.

Certain embodiments provide an apparatus for transmitting data. The apparatus generally includes a receiver for receiving bulk data packets, a converter for extracting the bulk data packets from isochronous data packets, and a transmitter for transmitting the isochronous data packets to a USB capable device.

Certain embodiments provide an apparatus for transmitting data. The apparatus generally includes means for embedding a plurality of isochronous data packets into bulk data packets, and means for wirelessly transmitting the bulk data packets.

Certain embodiments provide an apparatus for transmitting data. The apparatus generally includes means for receiving bulk data packets, means for extracting isochronous data packets from the bulk data packets, and means for transmitting the isochronous data packets to a USB capable device.

Particular embodiments include a computer-readable medium for embedding a plurality of isochronous data packets into bulk data packets and encoded with instructions executable to wirelessly transmit the bulk data packets. Provide program stuff.

Certain embodiments include a computer readable medium encoded with instructions executable to receive bulk data packets, extract isochronous data packets from the bulk data packets, and send the isochronous data packets to a USB capable device. Provides a computer-program product for transferring data.

Certain embodiments provide a wireless adapter. The wireless adapter generally includes an antenna, a converter for embedding isochronous data packets into bulk data packets, and a transmitter for wirelessly transmitting the bulk data packets using the antenna.

Certain embodiments provide a wireless adapter. The wireless adapter generally includes an antenna, a receiver for receiving bulk data packets via the antenna, a converter for extracting isochronous data packets from the bulk data packets, and transmitting the isochronous data packets to a USB capable device. It includes a transmitter for.

The present disclosure will be best understood from the detailed description with reference to the accompanying drawings. In accordance with standard practice in the art, various features have not been shown to be measured. The dimensions of the various features may be arbitrarily increased or reduced for clarity of explanation. Moreover, not all features are shown in all the figures for the sake of simplicity.
1 is a diagrammatic representation of a system in which disclosed embodiments may be practiced.
FIG. 2 is a diagrammatic representation of data being transmitted that may be implemented in the WUSB system of FIG.
3 is a flowchart illustrating a method for transmitting data that may be implemented in the WUSB system of FIG.
4 is a flowchart of a method for transforming data, which may be implemented in the method of FIG.
5 is a flowchart of an alternative method for transforming data in which the method of FIG. 3 may be implemented.
6A and 6B illustrate example isochronous data transmissions and corresponding bulk data transmissions, respectively, in accordance with certain aspects of the present disclosure.
7 illustrates example operations for isochronous (OUT) data transfer from a host to a device, via wireless USB bulk data transfer, in accordance with certain aspects of the present disclosure.
8 is a diagram of an isochronous (OUT) data transfer from a host to a device via wireless USB bulk data transfer, in accordance with certain aspects of the present disclosure.
9 illustrates example operations for isochronous (IN) data transfer from a host to a device via wireless USB bulk data transfer, in accordance with certain aspects of the present disclosure.
10 is a diagram of an isochronous (IN) data transfer from a host to a device, via wireless USB bulk data transfer, in accordance with certain aspects of the present disclosure.

Various aspects of the invention are now described more fully with reference to the drawings. However, the present invention may 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 present teachings, whether implemented independently or in combination with other aspects of the present invention, those skilled in the art will understand that the scope of the present invention is intended to cover all aspects of the disclosed invention. For example, an apparatus may be implemented or a method may be performed using any number of the presented aspects. In addition, the scope of the present invention is intended to cover methods and apparatus that are implemented using other configurations, functionality, or configurations and functionality in addition to or excluding the various aspects of the present invention as set forth. It should be understood that any aspect of the disclosed subject matter may be implemented by one or more elements of a claim.

The term " exemplary " is used herein to mean " serving as an example, example, or illustration. &Quot; Any aspect described herein as “exemplary” does not necessarily need to be construed as preferred or advantageous over other aspects.

The present disclosure generally relates to isochronous data transfer using a bulk data transfer type in a wireless USB (WUSB) system. However, it should be understood that the following disclosure provides a number of different embodiments, or examples, for implementing the different features of the disclosure. Specific examples of components and arrangements are described below to simplify the present disclosure. 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 the various embodiments. This repetition is for the purpose of simplicity and brevity and does not reiterate the relationship between the various embodiments and / or configurations described.

Referring to FIG. 1, system 100 is an exemplary WUSB system that may benefit from one or more embodiments of the present disclosure. System 100 includes a USB capable host device 110, such as a computer or laptop, having at least one USB port. The host 110 is connected to a host wired adapter (HWA) 112 via a USB port. Host 110 and HWA 112 communicate via USB wire 114. HWA 112 provides WUSB functionality to host 110.

Host 110 has HWA driver 116 that provides software that facilitates communication including HWA 112. HWA 112 includes a wireless transceiver 118. HWA 112 uses transceiver 118 to communicate wirelessly with device wired adapter (DWA) 120 via wireless link 122. HWA 112 communicates with DWA 120 using the WUSB protocol. Wireless link 122 is established over an ultra-wideband (UWB) spectrum.

Those skilled in the art will appreciate that instead of using a transceiver, separate components may be used for transmission (e.g., transmitter) and reception (e.g., receiver).

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

Referring to Fig. 2, there is shown a diagram representation in which data is being transmitted in accordance with an embodiment. For example, diagram representation 200 may be implemented in WUSB system 100 of FIG. Similar features of FIGS. 1 and 2 are numbered identically for simplicity. First, the DWA driver 124 recognizes and enumerates the USB isochronous device 128. The DWA driver 124 then declares the isochronous transfer type to the isochronous endpoint 132 of the DWA 120 associated with the USB isochronous device 128 to the wired adapter remote pipe declared as the isochronous transfer type. Wired adapter remote pipes. DWA 120 also establishes isochronous endpoint 134 on DWA 120 as an isochronously scheduled endpoint.

The USB capable host device 110, such as a laptop, requests isochronous data transfer 210 to the USB capable isochronous device 128. In the case where an isochronous data transfer request is made by the host 110, isochronous data transfer with the isochronous data transfer type 210 is provided to the DWA driver 124. Isochronous data transmission 210 consists of isochronous data packets 212. DWA driver 124 converts isochronous data packets 212 into isochronous data with bulk data transfer type 214.

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

This concatenation is repeated for each isochronous data packet 212 in the isochronous data transfer 210. In an embodiment according to the present disclosure, the DWA driver 124 combines packet lengths 216 with isochronous data packets 212 in a manner that each packet length precedes a corresponding isochronous data packet. Isochronous data with bulk transfer type 214 is provided to HWA driver 116 for delivery to HWA 112.

HWA 112 then wirelessly transmits isochronous data 214 to DWA 120 over UWB link 122 using bulk data transmission. After the DWA 120 receives the isochronous data 214, the DWA 120 converts the data 214 back into isochronous data packets 212 and is suitable for delivery to the USB capable isochronous device 128. Form data packets 212.

In one embodiment of the present disclosure, DWA 120 understands that bulk transmission of isochronous data packets 212 with aggregated isochronous data having bulk data transmission type 214. Thus, DWA 120 separates isochronous data packets 212 from isochronous data having bulk data transfer type 214. DWA 120 may store the resulting isochronous data packets 212 on DWA 120 to meter out delivery of isochronous data packets 212 based on isochronous scheduler 136. Forward to isochronous endpoint 134. According to certain embodiments, the scheduler 136 will meter delivery of isochronous data packets out according to the quality of service and / or traffic parameters defined by the isochronous endpoint to which the data is directed.

In particular, DWA 120 separates original isochronous data packets 212 from isochronous data transmissions having bulk data transfer type 214. After the DWA 120 completes the conversion of the received isochronous data 214 into isochronous data packets 212, the DWA 120 sends the original isochronous data packets 212 to a USB capable isochronous device ( 128).

Referring also to FIG. 3, shown is a flow diagram of a method 300 for wirelessly transmitting data in accordance with an embodiment that may be implemented in the system 100 of FIG. 1. According to certain embodiments, the operations of FIG. 3 utilize USB bulk data transfer operations between the host and the USB device as though transmitting using isochronous data transfer operations over a direct (wired) link between the host and the device. It may be performed to transmit data wirelessly.

6 is a diagram of an example packet exchange between a host and a USB capable device, over a wireless link between HWA and DWA, which may correspond to the operations shown in FIG.

The method 300 begins at block 310 by providing first data (such as isochronous data) having a first data transmission type (such as an isochronous data transmission type). At block 320, the method 300 continues by converting the first data into second data (such as isochronous data) having a second data transmission type (such as a bulk transmission type). The method 300 continues by wirelessly transferring the second data from the first USB capable device (such as HWA) to the second USB capable device (such as DWA) using the second data transfer type in block 330. do. The method 300 continues by converting wirelessly transmitted second data into third data (such as isochronous data) having a first data transmission type.

4, a flowchart of a method for converting data that can be used in block 320 of FIG. 3 is shown. The method begins by determining in block 410 isochronous data packet length corresponding to each of the plurality of isochronous data packets. The method continues by combining multiple isochronous data packets with isochronous data packet lengths such that each isochronous data packet precedes the corresponding isochronous data packet at block 420.

Referring to FIG. 5, a flow diagram illustrating a method for transforming data that may be used in block 340 of FIG. 3 is shown. The method includes separating a plurality of isochronous data packets from second data (such as isochronous data with a bulk transmission type).

In an alternative embodiment, referring back to FIG. 2, isochronous data including bulk data type 214 is marked at a higher priority, facilitating earlier arrivals in WUSB transactions than other data transfer types. Can be. For example, the bulk data transfer 218 shown in FIG. 2 is provided to the DWA driver 124. As described 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 is higher for delivery in WUSB data transfer 200 than other data transfer types. Mark the resulting isochronous data 214 to have priority. Both isochronous data with bulk data 220 and bulk data transfer type 214 is provided to HWA driver 116. HWA driver 116 recognizes the priority of isochronous data 214 and thus promotes isochronous data with bulk data transfer type 214 for delivery to DWA 120 prior to bulk data 220. .

According to certain aspects, the wired adapter driver (e.g., DWA driver 124 and / or HWA driver 116) ensures that bulk data with isochronous data is given a higher priority than other bulk data. can do. For example, in the case of using wired adapters, the wired adapter drivers may perform a scheduling function that determines which traffic is scheduled next. Thus, during this scheduling, wireline adapter drivers may implement prioritization by scheduling bulk data packets with isochronous data to be sent before other bulk data.

According to certain aspects, bulk data packets with isochronous data may be given higher priority by inserting into a high priority queue that is serviced before other queues. According to certain embodiments, to further ensure prioritization, the WUSB host may also enable prioritization of bulk data packets with isochronous data in the scheduling algorithm.

According to certain embodiments, the priority of the queues may be achieved by actually delaying transmission from one or more queues. For example, (normal) bulk data queues (used for bulk data transmissions with no isochronous data packets) may sometimes be restricted from transmission by monitoring memory usage in DWA and / or HWA. In this case where memory usage is detected, the bulk data queue may be delayed to remove the high priority queue in bandwidth for the transmission of bulk data packets (potentially small bulk data packets with isochronous data). .

Certain types of data transmissions may not be rearranged or partitioned. Thus, in the case of certain embodiments, the DWA driver may collect isochronous data payloads without bypassing any data packets in the bulk data queue (e.g., bypassing may cause partitioning). If caused). For example, if the bulk data queue previously sent a transmission request header for a data packet initiated by DWA, in some cases this transaction will not be split from the data payload according to the wired adapter protocol for DWA. . Thus, in this case, two markers of the first marker indicating the priority and the second marker indicating the segmentation capability can be used to deliver packets from the DWA driver to the HWA driver.

According to certain embodiments, all bulk data transmissions sent to the HWA driver may have an I / O request pachet (IRP) with context information for the bulk data transmission. According to certain embodiments, a particular field in the reserved IRP for use as a priority field may be set to indicate a high priority for bulk data transmissions with isochronous data packets.

Alternative embodiments of the present disclosure may include a WUSB system as shown in FIG. 1 with a USB capable isochronous device that is an audio microphone. Other embodiments may include USB capable devices that support real time data transfer streaming. Also, in an alternative embodiment, the USB capable host 110 in the WUSB system shown in FIG. 1 may optionally include a native WUSB capable host, thus eliminating the need for HWA 112. . In addition, in another alternative embodiment according to the present disclosure, the USB capable isochronous device 128 in the WUSB system 100 shown in FIG. Need to be eliminated.

Further, in another alternative embodiment, the UWB system 100 of FIG. 1 supports isochronous data transmissions originating from the DWA 120 and using bulk data transmission to wirelessly transmit isochronous data to the HWA 112. do.

Example Packet Conversion

 As described above, due to the nature of wireless communication, WUSB isochronous data transmissions may require increased complexity compared to wired USB isochronous data transmissions. However, certain embodiments of the present disclosure may use isochronous USB bulk data transfer operations to enable isochronous data transfers between a host and a USB device.

Using the techniques presented herein, wireless USB bulk data transfers can be used between the host and a USB capable isochronous device to achieve isochronous data transfers as if they were directly connected via a wired USB connection.

As described above, in certain embodiments, when preparing for data conversion from an isochronous transport type to a bulk data transport type, data packet lengths may be concatenated with their respective isochronous data packets within the bulk data stream. Can be. At this time, the isochronous data packets and their respective lengths may be transmitted using wireless USB bulk data transmission. In the case of receiving a bulk data transmission with isochronous data packets embedded in the bulk data transmission, the data packet lengths may allow the receiving entity to extract the corresponding isochronous data packets. For example, the receiving entity can read the data packet length and read the next number of bytes of the corresponding data packet.

6A and 6B show how isochronous data packets can be converted into data packets suitable for bulk data transmission. 6A shows isochronous data transfer 210 of data packets 212. As shown, each data packet 212 has a corresponding length L (eg, data packet D1 has a length L1 and data packet D2 has a length L2). The data packets may be sent, for example, to a host wired adapter using a normal isochronous data transmission with OUT tokens followed by data packets D1 through DN. Depending on the isochronous data transmissions, the length of each data packet may vary.

As shown in FIG. 6B, isochronous data packets 212 (D1 through DN) may be converted to bulk data stream 214 having concatenated data packet lengths 216. Isochronous data packets 212 may then be sent via bulk data transmissions of packets (eg, D ′). Depending on the bulk data transmissions, a maximum data packet length (L _MAX ) may be used for each transmission if possible. Packets smaller than the maximum data packet length may signal the end of the bulk data transmission. Thus, the number of bulk data transmissions required to transmit isochronous data packets 212 and corresponding data packet lengths may vary depending on L _MAX and the actual lengths of the various data packets 212.

In the case of specific embodiments, the receiving device may generate an ACK packet to confirm receipt of the bulk data transmission. However, to support the isochronous nature of data transmission, rules requiring retransmission of packets with bit errors (eg, as indicated by mismatch with CRC) may be ignored and some of the packets may be ignored. Or a known packet (e.g. corresponding to silence of audio or video data transmissions) may be processed in spite of this.

As described above, in certain embodiments, bulk data transfers with isochronous data packets may be used to ensure that data is transmitted at a rate sufficient to satisfy bandwidth and negotiated latency requirements between the host and the device. It may be marked to have a higher priority than data. According to certain embodiments, all bulk data transmissions sent to the HWA driver may have an I / O Request Packet (IRP) with contextual information for bulk data transmission. According to certain embodiments, a particular field in the IRP reserved for use as a priority field may be set to indicate a high priority for bulk data transmissions with isochronous data packets. Also, in certain embodiments, other bulk data may be included in the bulk data transmission with isochronous data packets. In such embodiments, any suitable technique may be used to distinguish between isochronous data packets and other bulk data packets.

7 illustrates example operations for isochronous (OUT) data transfer from a host to a device, in accordance with wireless USB bulk data transfer, in accordance with certain aspects of the present disclosure. These operations can be operated on a host device (eg by a DWA driver, HWA driver, or HWA) (602-604) and on a USB capable device (eg by a scheduler of DWA or DWA). It includes.

At 602, the operations begin by obtaining isochronous data packets. Isochronous data packets can be obtained, for example, by an isochronous data driver (which can operate on top of a DWA driver) obtaining isochronous data packets from applications. Audio (eg, a music player or telephony application) or video .. At 604, isochronous data packets and data packet lengths may be transmitted using wireless USB bulk data transfer.

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

FIG. 8 shows a diagram of an exemplary isochronous (OUT) data transfer in accordance with wireless USB bulk data transfer operations corresponding to the operations of FIG. 7, from the host to the device. As shown, stream 210 of isochronous data packets 212 is in bulk data transport stream 214 having isochronous data packets 212 and corresponding data packet lengths 216 contiguous thereto. Can be converted. HWA 112 may send bulk data transport stream 214 to DWA 120. At DWA 120, isochronous data packets 212 may be extracted and sent to USB capable isochronous data 128. For example, the scheduler 136 of the DWA 120 shown in FIG. 1 buffers isochronous data packets received via wireless USB bulk data transfer and transfers them to the USB capable isochronous device 128 at a negotiated rate. Can transmit

9 illustrates example operations of isochronous (IN) data transfer from a device to a host, via wireless USB bulk data transfer, in accordance with certain aspects of the present disclosure. The operations may be performed on a USB capable device (e.g., by a DWA or a scheduler of the DWA), operations 802-804, and operations that may be performed on a host computer (e.g., by an HWA). 812-816).

The operations begin at 802 by sending isochronous data packets using wired USB isochronous data transfer. At 804, isochronous data packets and data packet lengths are sent using wireless USB bulk data transfer.

At 812, a bulk data transmission is received and isochronous data packets are extracted therefrom using data packet lengths at 814. At 816, isochronous data packets are sent to the device using a (normal) wired USB isochronous data transfer.

FIG. 10 shows a diagram of an exemplary isochronous (OUT) data transfer from a device to a host, via wireless USB bulk data transfer operations corresponding to the operations of FIG. 9. As shown, stream 210 of isochronous data packets 212 from device 128 is bulk data transport stream 214 having isochronous data packets 212 and corresponding data packet lengths concatenated therewith. Can be converted to DWA 120 may send bulk data transport stream 214 to HWA 112. HWA 112 may forward the bulk data transfer 214 to the HWA driver and the DWA driver, for example, the DWA driver may extract isochronous data packets 212 to be delivered to the host 120. The isochronous data packets are for example host 120 in a metered manner by a scheduler application that buffers isochronous data packets received via a USB bulk data transfer and sends them to the host 12 at a negotiated rate. Can be delivered.

Although embodiments of the present disclosure have been described in detail, those skilled in the art will be able to implement various changes, substitutions and changes without departing from the spirit and scope of the disclosure. For example, although specific embodiments describe certain steps or procedures, many alternative implementations are possible and may be possible by simple design choices. Some process steps may be executed in a different order than the specific description, for example, taking into account functionality, purpose, compliance with standards, legacy structures, user interface design, and the like. The disclosed embodiments have been provided with reference to UWB systems. However, implementations of the disclosed embodiments are not limited to specific radio frequency systems. In addition, several different advantages exist from these and other embodiments. In addition to providing an efficient and cost effective method and system for transferring isochronous data using bulk data transfer in wireless USB systems, the disclosed methods and systems are readily implemented by modifications to the DWA and its device drivers. Can be. In addition, by converting the isochronous data transfer to the bulk data transfer type in the device driver, the need for additional endpoints and / or handling in the HWA may be eliminated. In addition, the DWA can meter transfer synchronization independently of any other timing mechanism, such as USB-level frame start synchronization within the DWA itself.

According to certain embodiments, the wired adapter may meter the transmission of isochronous data packets according to traffic parameters and quality of service (QoS) defined by the isochronous endpoint.

Various operations of the methods described above may be performed by any suitable means capable of performing the corresponding functions. The means and various hardware and / E, including circuitry, application specific integrated circuit (ASIC), or processor may include, but are not limited to, software component (s) and / or module (s). In general, in the case of the operations described in the figures, these operations may be performed by corresponding relative means-plus-function components having similar reference numerals. For example, blocks 300, 320, 340, 600, and 800 shown in FIGS. 3, 4, 5, 7, and 9, respectively, may be performed by corresponding circuit blocks.

The term “determining” used encompasses a wide variety of operations. For example, “determining” may include calculation, computing, processing, derivation, lookup, lookup (eg, lookup of a table, database or other data structure), verification, and the like. In addition, “determining” may include receiving (eg, receiving information), evaluating (eg, evaluating data in memory), and the like. Also, “determining” may include resolving, selecting, setting and the like.

Various operations of the methods described above may be performed by any suitable means capable of performing operations such as various hardware and / or software component (s), circuits, and / or module (s). In general, any of the operations shown in the figures may be performed by corresponding functional means capable of performing the operations.

Various example logical blocks, modules, and circuits described in connection with the present disclosure and claims may include a general purpose processor; To implement digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices (PLDs), discrete gate or transistor logic, discrete hardware components, or such functions. It can be implemented or carried out through a combination of those designed. A general purpose processor may be a microprocessor; In alternative embodiments, such a processor may be a commercially available processor, controller, microcontroller, or state machine. A processor may be implemented as a combination of computing devices, such as, for example, a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or a combination of such configurations.

The steps and algorithms of the method described above in connection with the present disclosure may be implemented directly in hardware, in a software module executed by a processor, or in a combination thereof. The software module may reside in the form of any storage medium known in the art. Some examples of usable storage media include random access memory (RAM), read-only memory (ROM), flash memory, electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), registers, hard disk, erase Capable disks, CD-ROMs, and the like. A software module can include a single instruction, or multiple instructions, and can be distributed across several different code segments, between different programs, and across multiple storage media. The storage medium can be coupled to the processor such that the processor can read information from the storage medium and write the information to the storage medium. Alternatively, the storage medium may be integrated into the processor.

The disclosed methods include one or more steps or actions for achieving the described method. Method steps and / or actions may be interchanged with one another without departing from the scope of the claims. In other words, unless a specific order of steps or actions is specified, the order and / or use of specific steps and / or actions may be modified without departing from the scope of the claims.

The described functions can be implemented through hardware, software, firmware, or a combination thereof. If implemented in software, the functions may be stored as one or more instructions or code on a computer-readable medium. The storage medium may be any available media that can be accessed by a computer. For example, such computer readable media can be used to store required program code means in the form of RAM, ROM, EEPROM, CD-ROM, or instructions or data structures, and any other that can be accessed by a computer. Include but are not limited to media. The disks and discs used here are compact discs (CDs), laser discs, optical discs, DVDs, floppy disks, and Blu-ray? a disc, where the disk magnetically reproduces the data, while the disc optically reproduces the data via a laser.

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

The software or commands may also be transmitted via a transmission medium. For example, if the software is transmitted from a website, server, or other remote source via coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave Coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave may be included within the definition of transmission medium.

In addition, it should be understood that modules and / or other suitable means for performing the described methods and techniques may be obtained by a user terminal and / or an available base station and / or otherwise obtained. . For example, such an apparatus may be connected to a server that facilitates the transfer of means for performing the described methods. Alternatively, various methods described may be used to obtain various methods in the case where the user terminal and / or base station couples or provides the storage means to the apparatus, for example storage means (e.g., RAM, ROM, compact disc (CD). Or a physical storage medium such as a floppy disk). In addition, any other suitable technique for providing the described methods and techniques to an apparatus can be used.

It is to be understood that the claims are not limited to the precise configuration and components described. Various modifications, changes and variations may be possible within the arrangement, operation and details of the methods and apparatus described above without departing from the claims.

Claims (71)

As a method for transmitting data,
Receiving a request from a host to provide isochronous data packets to an endpoint on a USB enabled device;
Determining packet lengths for each of the isochronous data packets;
Concatenating the isochronous data packets and the packet lengths into a bulk data transfer type, wherein each isochronous data packet is concatenated with its corresponding packet length;
Wirelessly transmitting the bulk data transfer type to the USB capable device;
Extracting the isochronous data packets from the bulk data transmission type; And
Providing the isochronous data packets to the endpoint;
Data transfer method. delete delete delete delete delete delete delete The method of claim 1,
Metering each isochronous data packet for transmission to the endpoint, wherein the metering is performed by an isochronous scheduler,
Data transfer method. Wireless USB system for transferring data,
Determine the packet length for each isochronous data packet and bulk the isochronous data packets by concatenating the isochronous data packets with the packet lengths in such a manner that each isochronous data packet is concatenated with its corresponding packet length. An apparatus comprising a first conversion module configured to convert to; And
A transmitter adapted to wirelessly transfer the bulk transfer type from the device to a USB capable device, wherein the bulk transfer type is transmitted according to a first priority;
The transmitter is adapted to wirelessly transmit data packets to the USB enabled device according to a second priority if the data packets do not contain isochronous data,
Wherein the first priority and the second priority are different,
Wireless USB system for transferring data. delete delete delete 11. The method of claim 10,
The USB capable device includes one of a host wired adapter and a device wired adapter,
Wireless USB system for transferring data. 11. The method of claim 10,
The apparatus comprises a module configured to prioritize data packets,
Wireless USB system for transferring data. delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete An apparatus for transmitting data,
Means for embedding isochronous data packets within bulk transport data packets; And
Means for wirelessly transmitting the bulk transmitted data packets,
The bulk transport data packets are transmitted at a higher priority than other bulk transport data packets that do not include isochronous data packets,
Means for embedding
Determine an isochronous data packet length corresponding to each of the isochronous data packets; And
And include an indication for each of the isochronous data packet lengths in the bulk transport data packets.
Data transmission device. 60. The method of claim 59,
Means for receiving the isochronous data packets using a USB isochronous data transfer protocol,
Data transmission device. 60. The method of claim 59,
Means for wirelessly transmitting the bulk transmit data packets is configured to transmit the bulk transmit data packets using a USB bulk data transfer protocol,
Data transmission device. 60. The method of claim 59,
The means for embedding prioritizes the bulk transmitted data packets,
Data transmission device. 63. The method of claim 62,
The means for embedding prioritizes by writing the bulk transmit data packets to a high priority queue, the high priority queue at priority of queues containing bulk transmit data packets that do not contain isochronous data packets. Has a higher priority than
Data transmission device. 63. The method of claim 62,
The means for embedding prioritizes the bulk transmitted data packets by setting a priority indicator on an input / output request packet to a value indicating a high priority for the bulk transmitted data packets.
Data transmission device. As an apparatus,
Means for receiving bulk data packets and a priority indicator associated with the bulk data packets, the priority indicator including first isochronous data packets compared to second bulk data packets that do not include isochronous data packets. Indicate a higher priority for one bulk data packets;
Means for extracting the isochronous data packets from the first bulk data packets; And
Means for sending the isochronous data packets to a USB capable device,
The means for extracting
Determine a length of a particular isochronous data packet based on a length indicator included in the corresponding first bulk data packet; And
And extract the number of data bytes corresponding to the length of the particular isochronous data packet from the corresponding first bulk data packet,
Device. 66. The method of claim 65,
The means for transmitting is configured to transmit the isochronous data packets using a USB isochronous data transfer protocol,
Device. 66. The method of claim 65,
The means for receiving is configured to receive the bulk data packets using a USB bulk data transfer protocol,
Device. 66. The method of claim 65,
The means for transmitting is configured to meter the isochronous data packets for transmission to the USB enabled device,
Device. 69. The method of claim 68,
The means for transmitting is configured to meter the isochronous data packets according to traffic parameters and quality of service parameters defined by the isochronous endpoint,
Device. A computer readable medium encoded with instructions,
The instructions
Determine packet lengths of a set of isochronous packets;
Concatenate each isochronous packet with its corresponding packet length;
Concatenate concatenated isochronous packets and packet lengths into first bulk data packets according to the USB protocol; And
May be executed to initiate a wireless transmission for wirelessly transmitting bulk data packets including the first bulk data packets to another device,
Wherein the first bulk data packets are transmitted according to a higher priority than second bulk data packets that do not include isochronous data packets,
Computer readable medium. A computer readable medium encoded with instructions,
The instructions
Receive bulk data packets; And
Can be executed to extract isochronous data packets from received bulk data packets for delivery to a USB capable device by reading the packet lengths embedded in the received bulk data packets,
Packet length indicates the length of concatenated isochronous data packets,
Computer readable medium.

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