- •TABLE OF CONTENTS
- •1.1 Motivation
- •1.2 Design Goals
- •1.3 Objective of the Specification
- •1.4 Scope of the Document
- •1.5 USB Product Compliance
- •1.6 Document Organization
- •2.1 Terms
- •2.2 Conventions:
- •2.3 References
- •3.1 USB System Description
- •3.1.1 Topology
- •3.1.1.1 USB Host
- •3.1.1.2 Wireless USB Devices
- •3.2 Physical Interface
- •3.3 Power Management
- •3.4 Bus Protocol
- •3.5 Robustness
- •3.5.1 Error Handling
- •3.6 Security
- •3.7 System Configuration
- •3.7.1 Attachment of Wireless USB Devices
- •3.7.2 Removal of Wireless USB Devices
- •3.7.3 Bus Enumeration
- •3.8 Data Flow Types
- •3.9 Wireless USB Devices
- •3.9.1 Device Characterizations
- •3.9.2 Devices and MAC Layer
- •3.10 Wireless USB Host: Hardware and Software
- •4.1 Implementer Viewpoints
- •4.2 Communications Topology
- •4.2.1 Physical Topology
- •4.3 Wireless USB Communication Flows
- •4.3.1 Wireless USB Channel Time
- •4.3.2 MMC Transmission Accuracy
- •4.3.3 USB Time across Device Wire Adapters
- •4.3.5 Device Endpoints
- •4.3.6 Wireless USB Information Exchange Methods
- •4.3.7 Device Perspective
- •4.3.7.1 Self Beaconing Devices
- •4.3.7.2 Directed Beaconing Devices
- •4.3.7.3 Non Beaconing Devices
- •4.3.7.4 Selecting A Wireless USB Host
- •4.3.8 Host Perspective
- •4.3.8.1 MAC Layer Compliant Device
- •4.3.8.2 Wireless USB Host
- •4.3.8.3 Host System Management
- •4.3.8.5 Other Host Considerations
- •4.4 Data Transfers
- •4.4.1 Burst Mode Data Phase
- •4.5 Bulk Transfers
- •4.5.1 Bulk Transfer Packet Size and Signaling Rate Constraints
- •4.5.2 Bulk Transfer Channel Access Constraints
- •4.5.3 Bulk Transfer Data Sequences
- •4.6 Interrupt Transfers
- •4.6.1 Low Power Interrupt IN
- •4.6.2 Interrupt Transfer Packet Size and Signaling Rate Constraints
- •4.6.3 Interrupt Transfer Channel Access Constraints
- •4.6.4 Interrupt Transfer Data Sequences
- •4.7 Isochronous Transfers
- •4.7.1 Isochronous Transfer Packet Size and Signaling Rate Constraints
- •4.7.2 Isochronous Transfer Channel Access Constraints
- •4.7.3 Isochronous Transfer Data Sequences
- •4.7.4 Isochronous Endpoint Host System Admission Decisions
- •4.7.5 Isochronous Data Discards and Use of Isochronous Packet Discard IE
- •4.8 Control Transfers
- •4.8.1 Control Transfer Packet Size and Signaling Rate Constraints
- •4.8.2 Control Transfer Channel Access Constraints
- •4.8.3 Control Transfer Data Sequences
- •4.8.4 Data Loopback Commands
- •4.9 Device Notifications
- •4.10 Media Reliability Considerations
- •4.10.1 Transmit Power Control
- •4.10.2 Adjustments to Data Phase Packet Payload Sizes
- •4.10.3 Adjustments to Transmit Bit Rate
- •4.10.4 Changing PHY Channel
- •4.10.5 Host Schedule Control
- •4.10.6 Dynamic Bandwidth Interface Control
- •4.11 Special Considerations for Isochronous Transfers
- •4.11.1 Summary Of Key Features Of USB Wired Isochrony
- •4.11.1.1 Wireless Service Intervals
- •4.11.2 UWB Media Characteristics
- •4.11.2.1 Superframe Layout
- •4.11.2.2 Worst Case Superframe Layout – Service Interval Bounds.
- •4.11.2.3 Wireless Packet Error Rates
- •4.11.3 Wireless USB Isochronous Transfer Level Protocol
- •4.11.4 Wireless USB Isochronous IN Example
- •4.11.5 Wireless USB Isochronous OUT Example
- •4.11.6 Choosing an Isochronous IN or Isochronous OUT Endpoint Buffer Size
- •4.11.7 Isochronous OUT endpoint receiver implementation options
- •4.11.7.1 Presentation Time aware implementation
- •4.11.7.2 Presentation time aware implementation with “false” acknowledgement
- •4.11.7.3 Presentation time unaware implementations
- •4.11.8 Synchronization
- •4.11.8.1 Synchronizing a Stream Start Time
- •4.11.9 Error Handling Details
- •4.11.9.1 Reporting Data Discarded At the Transmitter
- •4.11.9.2 Discarding Data during A Burst
- •4.11.9.3 Application Handling of Discards
- •4.12 Device Reset
- •4.13 Connection Process
- •4.13.1 Reconnection Process
- •4.14 Disconnect
- •4.15 Security Mechanisms
- •4.15.1 Connection Lifetime
- •4.15.2 Host Security Considerations
- •4.15.2.1 CHID Selection
- •4.15.2.2 CDID Selection
- •4.16 Wireless USB Power Management
- •4.16.1 Device Power Management
- •4.16.1.1 Device Sleep
- •4.16.1.2 Device Wakeup
- •4.16.2 Host Power Management
- •4.16.2.1 Channel Stop
- •4.16.2.2 Remote Wakeup
- •4.16.2.3 Channel Start
- •4.17 Dual Role Devices (DRD)
- •4.17.2 Pairing P2P-DRD to establish reverse link
- •5.1 Packet Formats
- •5.2 Wireless USB Transaction Groups
- •5.2.1 Wireless USB Channel Time Allocation Information Elements
- •5.3 Transaction Group Timing Constraints
- •5.3.1 Streaming-Mode Inter-packet Constraints for the PHY
- •5.3.2 Protocol Synchronization
- •5.4 Data Burst Synchronization and Retry
- •5.5 Wireless USB Transactions
- •5.5.1 Isochronous Transactions
- •5.5.2 Control Transfers
- •5.5.3 Device Notifications
- •5.5.4 Flow Control
- •6.1 Introduction
- •6.1.1 Goal of USB Security
- •6.1.2 Security and USB
- •6.2 Overview
- •6.2.1 Base of Trust
- •6.2.2 Preserve the Nature of the USB Device Model
- •6.2.3 Implementation of Security Extensions
- •6.2.4 Encryption Methods
- •6.2.5 Message Format
- •6.2.6 Encryption Keys
- •6.2.6.1 Master Keys
- •6.2.6.2 Session Keys
- •6.2.7 Correct key determination
- •6.2.8 Replay Prevention
- •6.2.9 Secure Packet Reception
- •6.2.10 General Connection Model
- •6.2.10.1 Connection Context
- •6.2.10.2 Connection Lifetime
- •6.2.10.3 New Connection
- •6.2.10.4 Connection
- •6.2.10.5 Reconnection
- •6.2.10.6 Revocation
- •6.2.10.8 Diagnostic Support
- •6.2.10.9 Mutual Authentication
- •6.2.11 Key Management
- •6.2.11.1 PTK Management
- •6.2.11.2 GTK Management
- •6.3 Association and Authentication
- •6.3.1 Connection and Reconnection Requests
- •6.3.2 Authentication
- •6.3.2.1 Authentication Related Device Capabilities
- •6.3.2.2 Ceremonies
- •6.4.1 CCM nonce Construction
- •6.4.2 l(m) and l(a) Calculation
- •6.4.3 Counter-mode Bx Blocks
- •6.4.4 Encryption Ax Blocks
- •6.5.1 Key Derivation
- •6.5.2 Out-of-band MIC Generation
- •6.5.3 Example Random Number Generation
- •7.1 Wireless USB Device States
- •7.1.1 UnConnected
- •7.1.2 UnAuthenticated
- •7.1.3 Authenticated
- •7.1.4 Reconnecting
- •7.2 Generic Wireless USB Device Operations
- •7.3 Standard Wireless USB Device Requests
- •7.3.1 Wireless USB Extensions to Standard Requests
- •7.3.1.1 Clear Feature
- •7.3.1.2 Get Status
- •7.3.1.3 Set Address
- •7.3.1.4 Set Feature
- •7.3.1.5 Set Interface DS
- •7.3.1.6 Set WUSB Data
- •7.3.1.7 Data Loopback Write
- •7.3.1.8 DATA Loopback Read
- •7.3.2 Security-related Requests
- •7.3.2.1 Get Security Descriptor
- •7.3.2.2 Set Encryption
- •7.3.2.3 Get Encryption
- •7.3.2.4 Key Management
- •7.3.2.6 Set Security Data
- •7.3.2.7 Get Security Data
- •7.4 Standard Wireless USB Descriptors
- •7.4.1 Device Level Descriptors
- •7.4.1.1 Wireless USB Device Capabilities – UWB
- •7.4.2 Configuration
- •7.4.3 Endpoint
- •7.4.4 Wireless USB Endpoint Companion
- •7.4.5 Security-Related Descriptors
- •7.4.5.1 Security Descriptor
- •7.4.5.2 Key Descriptor
- •7.5 Wireless USB Channel Information Elements
- •7.5.1 Wireless USB Connect Acknowledge IE
- •7.5.2 Wireless USB Host Information IE
- •7.5.3 Wireless USB Channel Change Announcement IE
- •7.5.4 Wireless USB Device Disconnect IE
- •7.5.5 Wireless USB Host Disconnect IE
- •7.5.6 Wireless USB Release Channel IE
- •7.5.7 Wireless USB Work IE
- •7.5.8 Wireless USB Channel Stop IE
- •7.5.9 Wireless USB Device Keepalive IE
- •7.5.10 Wireless USB Isochronous Packet Discard IE
- •7.5.11 Wireless USB Reset Device IE
- •7.5.12 Wireless USB Transmit Packet Adjustment IE
- •7.6 Device Notifications
- •7.6.1 Device Connect (DN_Connect)
- •7.6.1.1 Connect Request
- •7.6.1.2 Reconnect Request
- •7.6.2 Device Disconnect (DN_Disconnect)
- •7.6.3 Device Endpoints Ready (DN_EPRdy)
- •7.6.4 Device MAS Availability Changed (DN_MASAvailChanged)
- •7.6.5 Device Sleep (DN_Sleep)
- •7.6.6 Remote Wakeup (DN_RemoteWakeup)
- •7.6.7 Device Alive (DN_Alive)
- •8.1 Operational Model
- •8.1.1 Functional Characteristics
- •8.1.2 Data Transfer Interface
- •8.1.3 Remote Pipe
- •8.1.4 Wire Adapter Functional Blocks
- •8.1.5 Downstream Port(s)
- •8.1.6 Upstream Port
- •8.1.7 Downstream Host Controller
- •8.1.8 Upstream Endpoint Controller
- •8.1.9 Remote Pipe Controller
- •8.1.9.1 RPipe Descriptor
- •8.1.9.2 Bulk OUT Overview
- •8.1.9.3 Bulk IN Overview
- •8.1.9.4 Control Transfer Overview
- •8.1.9.5 Interrupt Transfer Overview
- •8.1.9.6 Isochronous Transfer Overview
- •8.1.10 Suspend and Resume
- •8.1.10.1 DWA Suspend and Resume
- •8.1.10.2 HWA Suspend and Resume
- •8.1.11 Reset Behavior
- •8.1.12 Device Control
- •8.1.13 Buffer Configuration
- •8.2 Descriptors
- •8.3 Requests
- •8.3.1 Wire Adapter Class-Specific Requests
- •8.3.1.1 Abort RPipe
- •8.3.1.2 Clear RPipe Feature
- •8.3.1.3 Clear Wire Adapter Feature
- •8.3.1.4 Get RPipe Descriptor
- •8.3.1.5 Get RPipe Status
- •8.3.1.6 Get Wire Adapter Status
- •8.3.1.7 Set RPipe Descriptor
- •8.3.1.8 Set RPipe Feature
- •8.3.1.9 Set Wire Adapter Feature
- •8.3.1.10 Reset RPipe
- •8.3.2 Notification Information
- •8.3.3 Transfer Requests
- •8.3.3.1 Control Transfers
- •8.3.3.2 Bulk and Interrupt Transfers
- •8.3.3.3 Transfer Completion Notification
- •8.3.3.4 Transfer Result
- •8.3.3.5 Abort Transfer
- •8.4 DWA Interfaces, Descriptors and Control
- •8.4.1 DWA Isochronous Streaming Interface
- •8.4.2 DWA Isochronous Streaming Overview
- •8.4.3 DWA Descriptors
- •8.4.3.1 Device Descriptor
- •8.4.3.2 Binary Device Object (BOS) Descriptor
- •8.4.3.3 Configuration Descriptor
- •8.4.3.4 Security Descriptors
- •8.4.3.5 Interface Association Descriptor
- •8.4.3.6 Data Transfer Interface Descriptor
- •8.4.3.7 Wire Adapter Class Descriptor
- •8.4.3.8 Notification Endpoint Descriptor
- •8.4.3.9 Notification Endpoint Companion Descriptor
- •8.4.3.10 Data Transfer Write Endpoint Descriptor
- •8.4.3.11 Data Transfer Write Endpoint Companion Descriptor
- •8.4.3.12 Data Transfer Read Endpoint Descriptor
- •8.4.3.13 Data Transfer Read Endpoint Companion Descriptor
- •8.4.3.14 Isochronous Streaming Interface Descriptor
- •8.4.3.15 Isochronous Streaming OUT Endpoint Descriptor
- •8.4.3.16 Isochronous Streaming OUT Endpoint Companion Descriptor
- •8.4.3.17 Isochronous Streaming IN Endpoint Descriptor
- •8.4.3.18 Isochronous Streaming IN Endpoint Companion Descriptor
- •8.4.3.19 Wire Adapter RPipe Descriptor
- •8.4.4 DWA Specific Requests
- •8.4.4.1 Clear Port Feature
- •8.4.4.2 Get Port Status
- •8.4.4.3 Set Isochronous Endpoint Attributes
- •8.4.4.4 Set Port Feature
- •8.4.5 DWA Notification Information
- •8.4.5.1 Remote Wake
- •8.4.5.2 Port Status Change
- •8.4.6 DWA Isochronous Transfers
- •8.4.6.1 DWA Isochronous OUT Responsibilities
- •8.4.6.2 DWA Isochronous IN Responsibilities
- •8.5 HWA Interfaces, Descriptors and Control
- •8.5.1 HWA Isochronous Streaming Overview
- •8.5.2 HWA Descriptors
- •8.5.2.1 Device Descriptor
- •8.5.2.2 Device_Qualifier Descriptor
- •8.5.2.3 Configuration Descriptor
- •8.5.2.4 Other_Speed_Configuration Descriptor
- •8.5.2.5 Security Descriptors
- •8.5.2.6 Data Transfer Interface Descriptor
- •8.5.2.7 Wire Adapter Class Descriptor
- •8.5.2.8 Notification Endpoint Descriptor
- •8.5.2.9 Data Transfer Write Endpoint Descriptor
- •8.5.2.10 Data Transfer Read Endpoint Descriptor
- •8.5.2.11 Wire Adapter RPipe Descriptor
- •8.5.3 HWA Specific Requests
- •8.5.3.2 Get BPST Adjustment
- •8.5.3.3 Get BPST Time
- •8.5.3.4 Get WUSB Time
- •8.5.3.5 Remove MMC IE
- •8.5.3.6 Set Device Encryption
- •8.5.3.7 Set Device Info
- •8.5.3.8 Set Device Key
- •8.5.3.9 Set Group Key
- •8.5.3.10 Set Num DNTS Slots
- •8.5.3.11 Set WUSB Cluster ID
- •8.5.3.12 Set WUSB MAS
- •8.5.3.13 Set WUSB Stream Index
- •8.5.3.14 WUSB Channel Stop
- •8.5.4 HWA Notification Information
- •8.5.4.1 BPST Adjustment Change
- •8.5.4.2 DN Received Notification
- •8.5.5 HWA Isochronous Transfers
- •8.5.5.1 HWA Isochronous OUT Responsibilities
- •8.5.5.2 HWA Isochronous IN Responsibilities
- •8.5.5.3 HWA Isochronous Transfer Completion
- •8.6 Radio Control Interface
- •8.6.1 Radio Control Descriptors
- •8.6.1.1 Radio Control Interface Descriptor
- •8.6.1.2 Radio Control Interface Class Descriptor
- •8.6.1.3 Radio Control Interrupt Endpoint Descriptor
- •8.6.2 Radio Control Command
- •8.6.2.1 Channel Change
- •8.6.2.2 Device Address Management
- •8.6.2.4 Reset
- •8.6.2.5 Scan
- •8.6.2.6 Set Beacon Filter
- •8.6.2.9 Set Notification Filter
- •8.6.2.10 Set TX Power
- •8.6.2.11 Sleep
- •8.6.2.12 Start Beaconing
- •8.6.2.13 Stop Beaconing
- •8.6.3 Radio Control Notifications
- •8.6.3.1 Application-specific Probe IE Received Notification
- •8.6.3.2 Beacon Received Notification
- •8.6.3.3 Beacon Size Notification
- •8.6.3.4 BPOIE Change Notification
- •8.6.3.5 BP Slot Change Notification
- •8.6.3.6 BP Switch IE Received Notification
- •8.6.3.7 Device Address Conflict Notification
- •8.6.3.8 DRP Availability Changed Notification
- •8.6.3.9 DRP Notification
- •A.1 Key Derivation
- •A.2 Handshake MIC calculation
- •A.3 Secure MMC (EO = payload length)
- •A.4 Data IN from device (EO = 2)
- •B.1 Descriptors for DWA
- •B.2 Descriptors for HWA
Wireless Universal Serial Bus
Specification
Agere
Hewlett-Packard
Intel
Microsoft
NEC
Philips
Samsung
May 12, 2005
Revision 1.0
Wireless Universal Serial Bus Specification, Revision 1.0
Scope of this Revision
The 1.0 revision of the specification is intended for product design. Every attempt has been made to ensure a consistent and implementable specification. Implementations should ensure compliance with this revision.
Revision |
Date |
Comments |
|
|
|
0.9 |
December 29, 2004 |
Incremental update with significant additions throughout the major |
|
|
chapters, including finalization of isochronous header for data |
|
|
packets, definition of explicit device disconnect mechanisms and |
|
|
details on directed beaconing devices, device and host power |
|
|
management, updates to wire adapter isochronous streaming model |
|
|
and radio control interface, to name a few. |
|
|
|
0.91 |
January 21, 2005 |
Incremental update from comments on the 0.9. Of particular note is a |
0.91a |
January 22, 2005 |
better device state machine, new isochronous out examples and a |
|
|
security mechanisms overview in the data flow chapter. Revision |
|
|
0.91a includes a 0.9b revision of the protocol chapter, which was |
|
|
omitted from 0.91 draft. |
|
|
|
0.95 |
Feburary 24, 2005 |
Incremental update from comments to the 0.91a. Of particular note is |
|
|
a new ‘active’ disconnect detection model, the addition of explicit |
|
|
mechanisms for transmit power control, updates to the security and |
|
|
wire adapter chapters. |
|
|
|
0.96 |
March 11, 2005 |
Incremental update from comments to 0.95. Significant updates to |
|
|
wire adapter and new commands added to the framework. |
|
|
|
1.0 rc |
March 31, 2005 |
Incremental updates to improve consistency and accuracy, better |
|
|
examples and improved readability. |
|
|
|
1.0 rc2 |
April 27, 2005 |
Final updates of technical issues and pagination completed. |
|
|
|
1.0 |
May 12, 2005 |
Final specification. |
|
|
|
Wireless Universal Serial Bus Specification
Copyright © 2005, Agere Systems, Inc. , Hewlett-Packard Company,
Intel Corporation, Microsoft Corporation, NEC Corporation,
Koninklijke Philips Electronics N.V., Samsung Electronics Co., Ltd.
All rights reserved.
INTELLECTUAL PROPERTY DISCLAIMER
THIS SPECIFICATION IS PROVIDED "AS IS" WITH NO WARRANTIES WHATSOEVER, INCLUDING ANY WARRANTY OF MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR ANY PARTICULAR PURPOSE, OR ANY WARRANTY OTHERWISE ARISING OUT OF ANY PROPOSAL, SPECIFICATION OR SAMPLE. THE AUTHORS OF THIS SPECIFICATION DISCLAIM ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PROPRIETARY RIGHTS, RELATING TO USE OF INFORMATION IN THIS SPECIFICATION. NO LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED HEREIN.
All product names are trademarks, registered trademarks, or servicemarks of their respective owners.
Please send comments via electronic mail to techsup@usb.org
For industry information, refer to the USB Implemnters Forum web page at http://www.usb.org
i
Wireless Universal Serial Bus Specification, Revision 1.0
Acknowledgement of Wireless USB Technical Contribution
The authors of this specification would like to recognize the following people who participated in the Wireless USB Key Developers technical working groups. We would also like to thank other in the Wireless USB Promoter companies and throughout the industry who contributed to the development of this specification.
John S. Howard |
Intel Corporation (Chair: Protocol/Editor) |
John Keys |
Intel Corporation (Chair: Security/Editor) |
Dan Froelich |
Intel Corporation (Chair: Isochronous/Editor) |
Masami Katagiri |
NEC Corporation (Chair: Wire Adapter) |
David Thompson |
Agere Systems, inc. |
Nirmalendu Patra |
Alereon, Inc. |
Ed Beeman |
Hewlett Packard |
Brad Hosler |
Intel Corporation (Editor: Architecture, Overview) |
Abdul (Rahman) Ismail |
Intel Corporation (Editor: Wire Adapter) |
James J. Choate |
Intel Corporation |
Fred Bhesania |
Microsoft Corporation |
Randy Aull |
Microsoft Corporation |
Glen Slick |
Microsoft Corporation |
Mark Maszak |
Microsoft Corporation |
Masahiro Noda |
NEC Corporation |
Hiromitsu Sakamoto |
NEC Corporation |
Masao Manabe |
NEC Corporation |
Bart Vertenten |
Royal Philips Electronics |
Kawshol Sharma |
Royal Philips Electronics |
Hilbert Zhang |
Royal Philips Electronics |
Jay O’Conor |
Royal Philips Electronics |
Young Kim |
Royal Philips Electronics |
Takashi Sato |
Royal Philips Electronics |
Larry Taylor |
Staccato Communications |
Shyam Narayanan |
Staccato Communications |
Tim Gallagher |
Staccato Communications |
Bill Long |
Staccato Communications |
Valerio Filauro |
STMicroelectronics |
Matt Myers |
Synopsys |
Jin-Meng Ho |
Texas Instruments |
Sue Vining |
Texas Instruments |
Yaser Ibrahim |
Texas Instruments |
Haim Kupershmidt |
Wisair Ltd. |
Ran Hay |
Wisair Ltd. |
ii
|
Wireless Universal Serial Bus Specification, Revision 1.0 |
|
TABLE OF CONTENTS |
|
|
CHAPTER 1 INTRODUCTION................................................................................. |
1 |
|
1.1 |
Motivation ............................................................................................................................................. |
1 |
1.2 |
Design Goals.......................................................................................................................................... |
2 |
1.3 |
Objective of the Specification .............................................................................................................. |
2 |
1.4 |
Scope of the Document ......................................................................................................................... |
2 |
1.5 |
USB Product Compliance .................................................................................................................... |
3 |
1.6 |
Document Organization ....................................................................................................................... |
3 |
CHAPTER 2 TERMS, CONVENTIONS AND REFERENCES................................... |
5 |
|
2.1 |
Terms..................................................................................................................................................... |
5 |
2.2 |
Conventions:.......................................................................................................................................... |
9 |
2.3 |
References............................................................................................................................................ |
10 |
CHAPTER 3 ARCHITECTURAL OVERVIEW......................................................... |
11 |
|
3.1 |
USB System Description..................................................................................................................... |
11 |
3.1.1 |
Topology....................................................................................................................................... |
11 |
3.2 |
Physical Interface ............................................................................................................................... |
13 |
3.3 |
Power Management............................................................................................................................ |
13 |
3.4 |
Bus Protocol ........................................................................................................................................ |
13 |
3.5 |
Robustness........................................................................................................................................... |
14 |
3.5.1 |
Error Handling.............................................................................................................................. |
14 |
3.6 |
Security................................................................................................................................................ |
14 |
3.7 |
System Configuration......................................................................................................................... |
14 |
3.7.1 Attachment of Wireless USB Devices.......................................................................................... |
14 |
|
3.7.2 Removal of Wireless USB Devices .............................................................................................. |
14 |
|
3.7.3 |
Bus Enumeration .......................................................................................................................... |
15 |
3.8 |
Data Flow Types ................................................................................................................................. |
15 |
3.9 |
Wireless USB Devices......................................................................................................................... |
15 |
3.9.1 |
Device Characterizations .............................................................................................................. |
16 |
3.9.2 Devices and MAC Layer .............................................................................................................. |
16 |
|
3.10 |
Wireless USB Host: Hardware and Software.................................................................................. |
17 |
iii
Wireless Universal Serial Bus Specification, Revision 1.0
CHAPTER 4 DATA FLOW MODEL ........................................................................ |
19 |
||
4.1 |
Implementer Viewpoints .................................................................................................................... |
19 |
|
4.2 |
Communications Topology ................................................................................................................ |
19 |
|
4.2.1 |
|
Physical Topology ........................................................................................................................ |
20 |
4.3 |
Wireless USB Communication Flows................................................................................................ |
21 |
|
4.3.1 |
|
Wireless USB Channel Time........................................................................................................ |
24 |
4.3.2 |
|
MMC Transmission Accuracy...................................................................................................... |
24 |
4.3.3 |
|
USB Time across Device Wire Adapters...................................................................................... |
24 |
4.3.4 |
|
Device and Application Co-existence........................................................................................... |
25 |
4.3.5 |
|
Device Endpoints.......................................................................................................................... |
27 |
4.3.6 |
|
Wireless USB Information Exchange Methods ............................................................................ |
27 |
4.3.7 |
|
Device Perspective........................................................................................................................ |
27 |
4.3.8 |
|
Host Perspective ........................................................................................................................... |
31 |
4.4 |
Data Transfers .................................................................................................................................... |
35 |
|
4.4.1 |
|
Burst Mode Data Phase ................................................................................................................ |
37 |
4.5 |
Bulk Transfers .................................................................................................................................... |
37 |
|
4.5.1 |
|
Bulk Transfer Packet Size and Signaling Rate Constraints .......................................................... |
38 |
4.5.2 |
|
Bulk Transfer Channel Access Constraints .................................................................................. |
39 |
4.5.3 |
|
Bulk Transfer Data Sequences...................................................................................................... |
39 |
4.6 |
Interrupt Transfers ............................................................................................................................ |
39 |
|
4.6.1 |
|
Low Power Interrupt IN................................................................................................................ |
40 |
4.6.2 |
|
Interrupt Transfer Packet Size and Signaling Rate Constraints .................................................... |
40 |
4.6.3 |
|
Interrupt Transfer Channel Access Constraints ............................................................................ |
41 |
4.6.4 |
|
Interrupt Transfer Data Sequences................................................................................................ |
42 |
4.7 |
Isochronous Transfers........................................................................................................................ |
42 |
|
4.7.1 |
|
Isochronous Transfer Packet Size and Signaling Rate Constraints............................................... |
43 |
4.7.2 |
|
Isochronous Transfer Channel Access Constraints....................................................................... |
45 |
4.7.3 |
|
Isochronous Transfer Data Sequences .......................................................................................... |
45 |
4.7.4 |
|
Isochronous Endpoint Host System Admission Decisions ........................................................... |
46 |
4.7.5 |
|
Isochronous Data Discards and Use of Isochronous Packet Discard IE ....................................... |
47 |
4.8 |
Control Transfers ............................................................................................................................... |
47 |
|
4.8.1 |
|
Control Transfer Packet Size and Signaling Rate Constraints...................................................... |
48 |
4.8.2 |
|
Control Transfer Channel Access Constraints .............................................................................. |
48 |
4.8.3 |
|
Control Transfer Data Sequences ................................................................................................. |
49 |
4.8.4 |
|
Data Loopback Commands........................................................................................................... |
49 |
4.9 |
Device Notifications ............................................................................................................................ |
50 |
|
4.10 |
Media Reliability Considerations...................................................................................................... |
50 |
|
4.10.1 |
Transmit Power Control................................................................................................................ |
51 |
|
4.10.2 Adjustments to Data Phase Packet Payload Sizes ........................................................................ |
53 |
||
4.10.3 Adjustments to Transmit Bit Rate................................................................................................. |
54 |
||
4.10.4 |
Changing PHY Channel................................................................................................................ |
54 |
|
4.10.5 |
Host Schedule Control.................................................................................................................. |
56 |
|
4.10.6 Dynamic Bandwidth Interface Control......................................................................................... |
56 |
||
4.11 Special Considerations for Isochronous Transfers .......................................................................... |
57 |
||
iv
Wireless Universal Serial Bus Specification, Revision 1.0
4.11.1 Summary Of Key Features Of USB Wired Isochrony.................................................................. |
57 |
||
4.11.2 |
UWB Media Characteristics ......................................................................................................... |
59 |
|
4.11.3 Wireless USB Isochronous Transfer Level Protocol .................................................................... |
61 |
||
4.11.4 Wireless USB Isochronous IN Example....................................................................................... |
61 |
||
4.11.5 Wireless USB Isochronous OUT Example................................................................................... |
65 |
||
4.11.6 Choosing an Isochronous IN or Isochronous OUT Endpoint Buffer Size .................................... |
67 |
||
4.11.7 Isochronous OUT endpoint receiver implementation options ...................................................... |
67 |
||
4.11.8 |
Synchronization ............................................................................................................................ |
73 |
|
4.11.9 |
Error Handling Details.................................................................................................................. |
74 |
|
4.12 |
Device Reset......................................................................................................................................... |
76 |
|
4.13 |
Connection Process............................................................................................................................. |
76 |
|
4.13.1 |
Reconnection Process ................................................................................................................... |
78 |
|
4.14 |
Disconnect ........................................................................................................................................... |
78 |
|
4.15 |
Security Mechanisms.......................................................................................................................... |
80 |
|
4.15.1 |
Connection Lifetime ..................................................................................................................... |
80 |
|
4.15.2 |
Host Security Considerations........................................................................................................ |
80 |
|
4.16 |
Wireless USB Power Management.................................................................................................... |
80 |
|
4.16.1 |
Device Power Management .......................................................................................................... |
81 |
|
4.16.2 |
Host Power Management.............................................................................................................. |
83 |
|
4.17 |
Dual Role Devices (DRD) ................................................................................................................... |
85 |
|
4.17.1 Discover P2P-DRD Host to establish default link ........................................................................ |
85 |
||
4.17.2 Pairing P2P-DRD to establish reverse link................................................................................... |
85 |
||
CHAPTER 5 PROTOCOL LAYER .......................................................................... |
87 |
|
5.1 |
Packet Formats ................................................................................................................................... |
87 |
5.2 |
Wireless USB Transaction Groups ................................................................................................... |
92 |
5.2.1 |
Wireless USB Channel Time Allocation Information Elements .................................................. |
93 |
5.3 |
Transaction Group Timing Constraints ........................................................................................... |
99 |
5.3.1 |
Streaming-Mode Inter-packet Constraints for the PHY.............................................................. |
101 |
5.3.2 |
Protocol Synchronization............................................................................................................ |
101 |
5.4 |
Data Burst Synchronization and Retry........................................................................................... |
102 |
5.5 |
Wireless USB Transactions.............................................................................................................. |
108 |
5.5.1 |
Isochronous Transactions ........................................................................................................... |
111 |
5.5.2 |
Control Transfers........................................................................................................................ |
111 |
5.5.3 |
Device Notifications ................................................................................................................... |
113 |
5.5.4 |
Flow Control............................................................................................................................... |
114 |
5.6 |
Physical and Media-Access Layer Specific Characteristics .......................................................... |
116 |
CHAPTER 6 WIRELESS USB SECURITY ........................................................... |
119 |
6.1 Introduction ...................................................................................................................................... |
119 |
6.1.1 Goal of USB Security ................................................................................................................. |
119 |
v
Wireless Universal Serial Bus Specification, Revision 1.0
6.1.2 |
|
Security and USB ....................................................................................................................... |
119 |
6.2 |
Overview............................................................................................................................................ |
120 |
|
6.2.1 |
|
Base of Trust............................................................................................................................... |
120 |
6.2.2 |
|
Preserve the Nature of the USB Device Model .......................................................................... |
120 |
6.2.3 |
|
Implementation of Security Extensions ...................................................................................... |
120 |
6.2.4 |
|
Encryption Methods.................................................................................................................... |
121 |
6.2.5 |
|
Message Format.......................................................................................................................... |
121 |
6.2.6 |
|
Encryption Keys ......................................................................................................................... |
121 |
6.2.7 |
|
Correct key determination .......................................................................................................... |
123 |
6.2.8 |
|
Replay Prevention....................................................................................................................... |
123 |
6.2.9 |
|
Secure Packet Reception............................................................................................................. |
123 |
6.2.10 |
General Connection Model......................................................................................................... |
123 |
|
6.2.11 |
Key Management........................................................................................................................ |
127 |
|
6.3 |
Association and Authentication....................................................................................................... |
127 |
|
6.3.1 |
|
Connection and Reconnection Requests..................................................................................... |
128 |
6.3.2 |
|
Authentication ............................................................................................................................ |
129 |
6.4 |
Interfacing to AES-128 CCM .......................................................................................................... |
132 |
|
6.4.1 |
|
CCM nonce Construction ........................................................................................................... |
132 |
6.4.2 |
|
l(m) and l(a) Calculation............................................................................................................. |
133 |
6.4.3 |
|
Counter-mode Bx Blocks ............................................................................................................ |
133 |
6.4.4 |
|
Encryption Ax Blocks ................................................................................................................. |
134 |
6.5 |
Pseudo-Random Function Definition.............................................................................................. |
134 |
|
6.5.1 |
|
Key Derivation............................................................................................................................ |
135 |
6.5.2 |
|
Out-of-band MIC Generation ..................................................................................................... |
136 |
6.5.3 |
|
Example Random Number Generation....................................................................................... |
136 |
CHAPTER 7 WIRELESS USB FRAMEWORK ..................................................... |
137 |
|
7.1 |
Wireless USB Device States ............................................................................................................. |
137 |
7.1.1 |
UnConnected .............................................................................................................................. |
138 |
7.1.2 |
UnAuthenticated ......................................................................................................................... |
138 |
7.1.3 |
Authenticated.............................................................................................................................. |
139 |
7.1.4 |
Reconnecting .............................................................................................................................. |
140 |
7.2 |
Generic Wireless USB Device Operations ...................................................................................... |
140 |
7.3 |
Standard Wireless USB Device Requests ....................................................................................... |
140 |
7.3.1 |
Wireless USB Extensions to Standard Requests......................................................................... |
141 |
7.3.2 |
Security-related Requests ........................................................................................................... |
153 |
7.4 |
Standard Wireless USB Descriptors ............................................................................................... |
161 |
7.4.1 |
Device Level Descriptors............................................................................................................ |
161 |
7.4.2 |
Configuration.............................................................................................................................. |
166 |
7.4.3 |
Endpoint...................................................................................................................................... |
167 |
7.4.4 |
Wireless USB Endpoint Companion .......................................................................................... |
170 |
7.4.5 |
Security-Related Descriptors ...................................................................................................... |
173 |
7.5 |
Wireless USB Channel Information Elements ............................................................................... |
175 |
7.5.1 |
Wireless USB Connect Acknowledge IE ................................................................................... |
177 |
7.5.2 |
Wireless USB Host Information IE ............................................................................................ |
178 |
7.5.3 |
Wireless USB Channel Change Announcement IE .................................................................... |
179 |
vi
Wireless Universal Serial Bus Specification, Revision 1.0
7.5.4 |
|
Wireless USB Device Disconnect IE.......................................................................................... |
179 |
7.5.5 |
|
Wireless USB Host Disconnect IE ............................................................................................. |
180 |
7.5.6 |
|
Wireless USB Release Channel IE ............................................................................................. |
180 |
7.5.7 |
|
Wireless USB Work IE............................................................................................................... |
181 |
7.5.8 |
|
Wireless USB Channel Stop IE .................................................................................................. |
182 |
7.5.9 |
|
Wireless USB Device Keepalive IE ........................................................................................... |
182 |
7.5.10 |
Wireless USB Isochronous Packet Discard IE ........................................................................... |
183 |
|
7.5.11 |
Wireless USB Reset Device IE................................................................................................... |
184 |
|
7.5.12 |
Wireless USB Transmit Packet Adjustment IE .......................................................................... |
184 |
|
7.6 |
Device Notifications .......................................................................................................................... |
185 |
|
7.6.1 |
|
Device Connect (DN_Connect) .................................................................................................. |
186 |
7.6.2 |
|
Device Disconnect (DN_Disconnect)......................................................................................... |
188 |
7.6.3 |
|
Device Endpoints Ready (DN_EPRdy) ...................................................................................... |
188 |
7.6.4 |
|
Device MAS Availability Changed (DN_MASAvailChanged) ................................................. |
190 |
7.6.5 |
|
Device Sleep (DN_Sleep)........................................................................................................... |
190 |
7.6.6 |
|
Remote Wakeup (DN_RemoteWakeup)..................................................................................... |
191 |
7.6.7 |
|
Device Alive (DN_Alive)........................................................................................................... |
191 |
7.7 |
MAC Layer-Specific Information/Framework.............................................................................. |
192 |
|
CHAPTER 8 WIRE ADAPTER.............................................................................. |
195 |
||
8.1 |
Operational Model............................................................................................................................ |
195 |
|
8.1.1 |
|
Functional Characteristics........................................................................................................... |
195 |
8.1.2 |
|
Data Transfer Interface ............................................................................................................... |
196 |
8.1.3 |
|
Remote Pipe................................................................................................................................ |
197 |
8.1.4 |
|
Wire Adapter Functional Blocks ................................................................................................ |
198 |
8.1.5 |
|
Downstream Port(s) .................................................................................................................... |
198 |
8.1.6 |
|
Upstream Port ............................................................................................................................. |
198 |
8.1.7 |
|
Downstream Host Controller ...................................................................................................... |
199 |
8.1.8 |
|
Upstream Endpoint Controller.................................................................................................... |
199 |
8.1.9 |
|
Remote Pipe Controller .............................................................................................................. |
199 |
8.1.10 |
Suspend and Resume .................................................................................................................. |
202 |
|
8.1.11 |
Reset Behavior............................................................................................................................ |
204 |
|
8.1.12 |
Device Control............................................................................................................................ |
204 |
|
8.1.13 |
Buffer Configuration .................................................................................................................. |
204 |
|
8.2 |
Descriptors ........................................................................................................................................ |
205 |
|
8.3 |
Requests............................................................................................................................................. |
205 |
|
8.3.1 |
|
Wire Adapter Class-Specific Requests ....................................................................................... |
206 |
8.3.2 |
|
Notification Information............................................................................................................. |
212 |
8.3.3 |
|
Transfer Requests ....................................................................................................................... |
212 |
8.4 |
DWA Interfaces, Descriptors and Control ..................................................................................... |
217 |
|
8.4.1 |
|
DWA Isochronous Streaming Interface...................................................................................... |
217 |
8.4.2 |
|
DWA Isochronous Streaming Overview .................................................................................... |
217 |
8.4.3 |
|
DWA Descriptors ....................................................................................................................... |
217 |
8.4.4 |
|
DWA Specific Requests ............................................................................................................. |
230 |
8.4.5 |
|
DWA Notification Information .................................................................................................. |
232 |
8.4.6 |
|
DWA Isochronous Transfers ...................................................................................................... |
233 |
8.5 |
HWA Interfaces, Descriptors and Control..................................................................................... |
236 |
|
8.5.1 |
|
HWA Isochronous Streaming Overview .................................................................................... |
236 |
vii
Wireless Universal Serial Bus Specification, Revision 1.0
8.5.2 |
HWA Descriptors ....................................................................................................................... |
236 |
8.5.3 |
HWA Specific Requests ............................................................................................................. |
244 |
8.5.4 |
HWA Notification Information .................................................................................................. |
251 |
8.5.5 |
HWA Isochronous Transfers ...................................................................................................... |
252 |
8.6 |
Radio Control Interface ................................................................................................................... |
254 |
8.6.1 |
Radio Control Descriptors .......................................................................................................... |
255 |
8.6.2 |
Radio Control Command............................................................................................................ |
256 |
8.6.3 |
Radio Control Notifications........................................................................................................ |
272 |
APPENDIX A WIRELESS USB CCM TEST VECTORS ....................................... |
277 |
|
A.1 |
Key Derivation .................................................................................................................................. |
277 |
A.2 |
Handshake MIC calculation ............................................................................................................ |
277 |
A.3 |
Secure MMC (EO = payload length)............................................................................................... |
277 |
A.4 |
Data IN from device (EO = 2).......................................................................................................... |
279 |
APPENDIX B WIRE ADAPTER EXAMPLE DESCRIPTOR SETS ....................... |
280 |
|
B.1 |
Descriptors for DWA........................................................................................................................ |
280 |
B.2 |
Descriptors for HWA ....................................................................................................................... |
285 |
viii