CN112333768A - Apparatus and method for data packet retransmission between multilink devices - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/189—Transmission or retransmission of more than one copy of a message
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W28/02—Traffic management, e.g. flow control or congestion control
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- H—ELECTRICITY
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- H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
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- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
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- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/14—Multichannel or multilink protocols
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Abstract
Embodiments of the present invention provide apparatus and methods for multilink operation that include retransmitting data using different wireless links. The following discussion describes exemplary electronic or computer systems that may be used as platforms for implementing embodiments of the present invention. For example, the multi-link device may be a multi-link wireless access point or a multi-link wireless station. A multi-link device may simultaneously operate multiple transceivers to perform multi-link operations, including retransmission using different wireless links. For example, a multilink device may transmit an encrypted MPDU using a first wireless link and may retransmit the MPDU using a second wireless link by setting a MAC header of the MPDU according to a MAC address of the second wireless link to advantageously enhance performance, reliability and efficiency of the wireless network.
Description
Related citations
The present invention claims priority from U.S. provisional patent application No. 62/882,630, attorney docket No. 251359-8727, filed on 5.8.2019 by Gabor Bajko et al, which is incorporated herein by reference.
Technical Field
The present invention relates to the field of wireless communications, and more particularly, to a system and method for data retransmission in a wireless communication network.
Background
Modern electronic devices typically send and receive data wirelessly with other electronic devices using Wi-Fi based techniques, including a wireless Access Point (AP) serving one or more wireless Stations (STAs) in a Basic Service Set (BSS). However, in certain situations, it may be advantageous for a wireless STA to connect to a different wireless link, e.g., to be less interfered with than a wireless link currently connected to or currently used by a peer wireless device after an unscheduled channel switch.
Unfortunately, existing data retransmission methods in wireless networks typically operate using only a single wireless link. For example, when a Data transmission (e.g., a Media Access Control Protocol Data Unit (MPDU) for transmission on a first link and is not successfully delivered (possibly after multiple attempts), existing Data retransmission methods will not be able to send subsequent retransmissions on a different link because the MPDU has already been encoded for the originally transmitted wireless link. Specifically, the encrypted MPDU includes a MAC header set using a MAC address of the first wireless link.
Disclosure of Invention
Multi-link operation may provide higher network throughput and higher network reliability than conventional wireless communication techniques. Accordingly, there is a need for a method of wireless data retransmission that can advantageously transmit data over multiple wireless links using multilink operation to improve the efficiency and performance of wireless networks while overcoming the limitations of existing data retransmission methods, including those described above.
Embodiments of the present invention provide apparatus and methods for multilink operation that include retransmitting data using different wireless links. For example, the multi-link device may be a multi-link wireless access point or a multi-link wireless station. A multi-link device may simultaneously operate multiple transceivers to perform multi-link operations, including retransmission using different wireless links. For example, a multilink device may transmit an encrypted MPDU using a first wireless link and may retransmit the MPDU using a second wireless link by setting a MAC header of the MPDU according to a MAC address of the second wireless link to advantageously enhance performance, reliability and efficiency of the wireless network.
According to one embodiment, a method for data retransmission over multiple wireless links using a multi-link device is disclosed. The method comprises the following steps: transmitting an encrypted MPDU on a first wireless link of a multi-link device, the encrypted MPDU including an authenticated data portion, a MAC header corresponding to the first wireless link being included in the authenticated data portion; and determining that the encrypted MPDU requires retransmission on a second wireless link of the multi-link device by using the MAC header.
According to some embodiments, the method includes storing a plaintext MPDU of the encrypted MPDU.
According to some embodiments, the method includes re-encrypting the stored plaintext MPDU using a MAC header corresponding to a second wireless link of the MPDU in an authentication data portion of the encrypted MPDU.
According to some embodiments, the method includes retransmitting the re-encrypted MPDU on a second wireless link.
According to some embodiments, the method includes negotiating a link establishment procedure with a peer wireless device.
According to some embodiments, negotiating a link establishment procedure with a peer wireless device comprises negotiating a MAC address selection, the MAC address selection comprising at least one of a MAC-SAP address, a WM MAC address, and a virtual address.
According to some embodiments, the method includes determining to retransmit the MPDU on the second wireless link.
In accordance with some embodiments, determining that the encrypted MPDU requires retransmission includes determining that a wireless link between peer devices is unavailable for MPDU transmission and that a different wireless link between peer devices is available for MPDU transmission.
In accordance with some embodiments, determining that the encrypted MPDU requires retransmission includes determining that a multilink device is transmitting delay sensitive data over a first wireless link and a second wireless link.
In accordance with some embodiments, re-encrypting the plaintext MPDUs for transmission over a second wireless link of the multilink device includes sending a request from an upper layer of the multilink device to a lower layer of the multilink device to re-encrypt the MPDUs.
According to some embodiments, the upper layer comprises an application layer.
According to some embodiments, the lower layer comprises a MAC layer.
According to various embodiments, a method for data retransmission over multiple wireless links using a multi-link device is disclosed. The method comprises the following steps: transmitting the encrypted MPDU on a first wireless link of a multi-link device; modifying a MAC header of the encrypted MPDU to indicate that the encrypted MPDU is encrypted using a MAC address of the first wireless link; and retransmitting the encrypted MPDU with the modified MAC header at the second wireless link.
According to some embodiments, the method includes negotiating a link establishment procedure with a peer wireless device.
According to some embodiments, the method includes determining that a multi-link device is transmitting delay-sensitive data over a first wireless link and a second wireless link.
According to another embodiment, a multi-link device for performing data retransmission using multiple wireless links is disclosed. The apparatus comprises: a first transceiver configured to transmit and receive data over a first wireless link of a multi-link device; a second transceiver configured to transmit and receive data over a second wireless link of the multi-link device; a memory to store MPDUs; and a processor operative to cause the transceiver to transmit an encrypted MPDU including an authenticated data portion on a first wireless link of the multi-link device to include a MAC header corresponding to the first wireless link in the authenticated data portion, and to determine, using the MAC header, that the encrypted MPDU requires retransmission on a second wireless link of the multi-link device.
According to some embodiments, the processor is further operable to store the encrypted MPDU in the memory as a clear text MPDU.
According to some embodiments, the processor is further operable to retransmit the re-encrypted MPDU on a second wireless link.
According to some embodiments, the processor is further operable to negotiate a link establishment procedure with a peer wireless device.
According to some embodiments, negotiating a link establishment procedure with a peer wireless device includes negotiating a MAC address selection, the MAC address selection including at least one of: MAC-SAP address, WM MAC address and virtual address.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention:
fig. 1 is a block diagram of an exemplary wireless communication system including a multi-band cooperative AP and a multi-band cooperative STA in accordance with an embodiment of the present invention.
Fig. 2 is a block diagram of an exemplary wireless STA including two instances of STAs, in accordance with an embodiment of the present invention.
Fig. 3 is a block diagram of an exemplary wireless AP including three AP instances in accordance with an embodiment of the present invention.
Fig. 4 is a block diagram of an exemplary wireless STA including two STA instances and a virtual interface for transmitting data on multiple WM links according to an embodiment of the present invention.
Fig. 5 is a block diagram of an exemplary CCMP encapsulation process for retransmitting payloads of MPDUs over a wireless link by a multilink device in accordance with an embodiment of the present invention.
Fig. 6 is a flowchart of an exemplary sequence of computer implemented steps of a process of automatically retransmitting data in a multilink operation when an original transmission is acknowledged, according to an embodiment of the present invention.
Fig. 7 is a flowchart of an exemplary sequence of computer implemented steps for a process of automatically retransmitting data in a multilink operation using a lower sub-layer (e.g., MAC layer) of a multilink device to perform retransmission, according to an embodiment of the present invention.
Fig. 8 is a flowchart of an exemplary sequence of computer implemented steps for a process of automatically retransmitting data in a multilink operation using previously encrypted MPDUs in accordance with an embodiment of the present invention.
FIG. 9 is a block diagram of an exemplary computer system platform on which embodiments of the present invention may be implemented.
Detailed Description
Several embodiments will be referred to in detail. While the subject matter will be described in conjunction with the alternative embodiments, it will be understood that they are not intended to limit the claimed subject matter to these embodiments. On the contrary, the claimed subject matter is intended to cover alternatives, modifications and equivalents, which may be included within the spirit and scope of the claimed subject matter as defined by the appended claims.
Furthermore, in the following detailed description, numerous specific details are described in order to provide a thorough understanding of claimed subject matter. However, it will be recognized by one skilled in the art that the embodiments may be practiced without these specific details or with equivalents thereof. In other instances, well-known methods, procedures, components, and circuits have not been described in detail as not to unnecessarily obscure aspects and features of the subject matter.
Portions of the detailed description that follows are presented and discussed in terms of methods. Although steps and sequences thereof are disclosed in the figures (e.g., fig. 6-8) describing the operations of the method, such steps and sequences are exemplary. Embodiments are well suited to performing various other steps or variations of the steps recited in the flowchart of the figure herein, and in a sequence other than that depicted and described herein.
Certain portions of the detailed description may be presented in terms of procedures, steps, logic blocks, processing, and other symbolic representations of operations on data bits that can be performed on computer memory. These descriptions and representations are the means used by those skilled in the data processing arts to most effectively convey the substance of their work to others skilled in the art. A procedure, computer-executed step, logic block, process, etc., is here, and generally, conceived to be a self-consistent sequence of steps or instructions leading to a desired result. The steps are those requiring physical manipulations of physical quantities. Usually, though not necessarily, these quantities take the form of electrical or magnetic signals capable of being stored, transferred, combined, compared, and otherwise manipulated in a computer system. It has proven convenient at times, principally for reasons of common usage, to refer to these signals as bits, values, elements, symbols, characters, terms, numbers, or the like.
It should be borne in mind, however, that all of these and similar terms are to be associated with the appropriate physical quantities and are merely convenient labels applied to these quantities. Unless specifically stated otherwise as apparent from the following discussions, it is appreciated that throughout the discussion, discussions utilizing terms such as "accessing," "configuring," "coordinating," "storing," "transmitting," "authenticating," "identifying," "requesting," "reporting," "determining," or the like, refer to the operation and processes of a computer system, or similar electronic computing device, that manipulates and transforms data represented as physical (electronic) quantities within the computer system's registers and memories into other data similarly represented as physical quantities within the computer system memories or registers or other such information storage, transmission or display devices.
Novel data packet retransmission between multilink devices
As used herein, the term "EHT" may generally refer to a new generation of wireless communication (Wi-Fi) referred to as very high Throughput (EHT) and is defined in accordance with the ieee802.11be standard. The term Station (STA) generally refers to an electronic device capable of sending and receiving data over Wi-Fi, which does not operate as an Access Point (AP).
Embodiments of the present invention provide apparatus and methods for multilink operation that include retransmitting data using different wireless links. For example, the multi-link device may be a multi-link wireless access point or a multi-link wireless station. A multi-link device may simultaneously operate multiple transceivers to perform multi-link operations, including retransmission using different wireless links. For example, a multilink device may transmit an encrypted MPDU using a first wireless link and may retransmit the MPDU using a second wireless link by setting a MAC header of the MPDU according to a MAC address of the second wireless link to advantageously enhance performance, reliability and efficiency of the wireless network.
Multi-link operation may provide higher network throughput and higher network flexibility than conventional techniques for wireless communication. With respect to fig. 1, an exemplary wireless communication system 100 including a multi-band cooperative AP105 and a multi-band cooperative STA155 in accordance with an embodiment of the present invention is depicted. The multi-band cooperative AP105 includes a 5GHz transceiver 110 and a 2.4GHz transceiver 115. Other types of transceivers operating on different frequency bands, such as 6GHz and above, may be used by the multi-band cooperative AP105 according to embodiments of the present invention. The transceivers 110 and 115 of the AP105 exchange data and information with the cooperation management unit 120, and the cooperation management unit 120 coordinates information transmitted and/or received by the transceivers 110 and 115.
The multi-band cooperative STA155 includes a 5GHz transceiver 160 and a 2.4GHz transceiver 165. Other types of transceivers operating on different frequency bands (e.g., 6GHz and above) may also be used by the multi-band cooperative STA155 according to embodiments of the present invention. The transceivers 160 and 165 of the STA155 exchange data and information with the cooperation management unit 170, and the cooperation management unit 170 coordinates information transmitted and received by the transceivers 160 and 165 using 5GHz band wireless communication and 2.4GHz band wireless communication, respectively.
The multi-band cooperative AP105 and the multi-band cooperative STA155 have simultaneous transmit and receive capabilities for communicating using different wireless frequency bands. Transmitters operating on different frequency bands may perform independent net channel assessment (CCA) using joint or intentional transmission. Furthermore, full duplex communication may be enabled by independent multi-band operation using FDD mode.
STA155, which transmits frames using multiple bands simultaneously, may mitigate delays and improve peak throughput of STA 155. However, in certain situations, the simultaneous use of multiple bands to transmit frames may degrade the performance of a Basic Service Set (BSS) that includes STA 155. For example, the performance of a BSS may be degraded when STAs 155 operating on multiple frequency bands simultaneously use a large amount of bandwidth available to the BSS due to increased traffic. Thus, the AP105 may control which STAs are granted multi-band channel access, and at any time the AP may control which accesses are terminated based on, for example, changing network conditions or requirements.
Depending on certain circumstances, such as traffic load, a non-AP STA may use less than all supported/available links to reduce energy consumption. Further, the non-AP STA may apply independent power management for each link, and the AP may provide TID-to-link (TID-to-link) mapping information for each link. According to a Quality of Service (QoS) policy of the BSS, the AP may allocate traffic to different links according to the traffic type (e.g., voice, video, data, etc.). For example, a frame belonging to a first Traffic Identifier (TID 1 for short) may be allocated to the first link, and a frame belonging to a second Traffic Identifier (TID 2 for short) may be allocated to the second link. In this case, the AP may provide TID to link mapping information to both links to the STA, where certain data can only be sent on the first link and other data can only be sent on the second link.
Data transmitted over a first wireless link (e.g., a 5GHz wireless link provided by 5GHz transceiver 110 or 160) may be retransmitted over a different wireless link. For example, if the data transmission on the 5GHz wireless link was not successfully transmitted (e.g., no acknowledgement was received), the data may be retransmitted on the 2.4GHz wireless link provided by the 2.4GHz transceiver 115/165. When a switch from an unscheduled channel to another occurs, or delay sensitive data packets are transmitted over multiple links, the data may be retransmitted over the second link. Further, a data transmission (e.g., PPDU) may be initially encoded for transmission over a first wireless link (e.g., a 2.4GHz or 5GHz wireless link) and the retransmitted data is ready for transmission, with embodiments of the invention as described herein for encrypting data for retransmission in a multiple link environment.
Fig. 2 is a block diagram of an exemplary wireless STA200 including an STA instance 205 and an STA instance 210 according to an embodiment of the present invention. The STA instance 205 is configured to transmit data over the wireless link 11 and the STA instance 210 is configured to transmit data over the wireless link 12. During multi-link operation, wireless STA200 is treated as a single device. STA instances 205 and 210 use Wireless Media (WM) Media Access Control (MAC) addresses to identify themselves to peer devices. The wireless STA200 also includes a MAC Service Address Point (SAP) 215, which is an interface that receives plaintext MPDUs for transmission over the wireless link 11 or the wireless link 12. Each wireless link of the wireless SAT200 is associated with a different MAC layer address. The address of the MAC SAP 215 may be used for key generation, SA setting, and data encryption for retransmission to retransmit encrypted MPDUs over a wireless link. MAC SAP 215 may also be a DS/WAN address or a virtual address, according to embodiments of the present invention.
Fig. 3 is a block diagram of an exemplary wireless AP300, the wireless AP300 including an AP instance 305, an AP instance 310, and an AP instance 315, in accordance with an embodiment of the present invention. AP instance 305 is configured to communicate data over wireless link 11, AP instance 310 is configured to communicate data over wireless link 12, and AP instance 315 is configured to communicate data over wireless link 13. During multilink operation, wireless AP300 is considered a single device. Wireless AP300 also includes a DS/WAN interface 320, which DS/WAN interface 320 receives unencrypted (plaintext) data (e.g., MPDUs) for transmission over wireless link 11, wireless link 12 or wireless link 13. Each wireless link of wireless AP300 is associated with a different MAC layer address. As shown in fig. 3, the address of DS/WAN interface 320 may be provided to the AP instance for key generation (e.g., TK key ID325) that is used to encrypt data for retransmission.
Fig. 4 is a block diagram of an exemplary wireless STA 400 including an STA instance 405 and an STA instance 410. According to an embodiment of the invention, the STA instance 405 is configured to traffic data on WM link 1, while the STA instance 210 is configured to traffic data on WM link 2. During multi-link operation, the wireless STA 400 is treated as a single device. The STA instances 405 and 410 use Wireless Media (WM) Media Access Control (MAC) addresses to identify themselves to peer devices. The wireless STA200 also includes a virtual interface 415 that receives unencrypted (plaintext) data (e.g., MPDUs with authenticated data portions) for transmission on WM link 1 or wireless WM link 2. Each WM link of the wireless SAT400 is associated with a different MAC layer address. As shown in fig. 4, one STA instance may provide another STA instance with a virtual address for key generation that is used to encrypt authenticated data for retransmission.
Fig. 5 is a Block diagram of an exemplary Counter Mode Cipher Block Chaining Message Authentication Code Protocol (CCMP) encapsulation process 500 for retransmitting a payload of an MPDU over a wireless link via a multi-link device, according to an embodiment of the present invention. The payload (e.g., data 520) of the MPDU505 is encrypted to generate an encrypted MPDU510 for retransmission, the MPDU510 including a MAC header 515 set according to a MAC address of a first wireless link of the multi-link device. The MPDU505 may be stored as a clear text or encrypted MPDU. The MPDU505 may be retransmitted after a previous transmission of the payload on a second wireless link of the multi-link device. The following exemplary retransmission process may be described with reference to fig. 6-8. According to some embodiments, peer devices negotiate which MAC address is used for encryption (e.g., MAC-SAP address, WN MAC address, or virtual address). For example, the WM MAC address may be used for interfacing with a Distribution System (DS), while the virtual address may be used when a multilink device is not connected to the DS.
With respect to fig. 6, a flowchart depicting an exemplary sequence of computer-implemented steps of a process 600 for automatically retransmitting authenticated portions of data in a multilink operation when an original transmission is acknowledged 600 according to an embodiment of the present invention.
In step 605, the MPDU is transmitted over a first wireless link (e.g., a 2.4GHz, 5GHz, or 6GHz link) by a multi-link device. The MPDU may be stored in the clear by the multilink device. Step 605 may include encrypting the MPDU for transmission over the first wireless link.
The multi-link device optionally waits a predetermined time at step 610.
The multi-link device optionally determines that a multi-link retransmission condition has been met at step 615. The multilink retransmission conditions may include: determining that a multi-link device is transmitting delay sensitive data over a first wireless link and a second wireless link (e.g., a 2.4GHz, 5GHz, or 6GHz link), an ACK indicates that an authentication data portion of a transmitted MPDU is not received and needs to be retransmitted, and determining that a peer wireless device (e.g., a peer multi-link device, a multi-link AP, a multi-link STA, etc.) switches from the first wireless link to the second wireless link.
At step 620, the plaintext MPDU is re-encrypted for retransmission over the second wireless link by the multi-link device. The MPDU may be re-encrypted using the CCMP encapsulation process shown in fig. 5. For example, the MPDU may be stored by the wireless device in clear text, and the MAC header contained in the MPDU may be set according to the address of the second wireless link to be retransmitted together with the re-encrypted MPDU.
At step 625, the re-encrypted MPDU is transmitted using a second wireless link in a multilink operation.
With respect to fig. 7, a flowchart depicting an exemplary sequence of computer implemented steps of a process 700 according to an embodiment of the invention, the process 700 uses a lower sub-layer (e.g., MAC layer) of a multi-link device to automatically retransmit data in a multi-link operation to perform the retransmission.
At step 705, the MPDU is transmitted on a first wireless link of a multi-link device. The MPDUs may be stored in the clear by the multilink device. Step 705 may include encrypting the MPDU for transmission over a first wireless link.
At step 710, after a period of time, the MPDU is retransmitted. Step 710 may repeat to retransmit the MPDU multiple times, e.g., according to a retransmission value/limit.
At step 715, the upper sub-layer (e.g., application/application layer) sends a request to the lower sub-layer (e.g., MAC layer) to re-encrypt the MPDU including a MAC header set according to a MAC address of a second wireless link of the multi-link device.
In step 720, the lower sublayer re-encrypts the MPDU using a MAC header set according to the MAC address of the second wireless link. The CCMP encapsulation process shown in fig. 5 may be used to re-encrypt MPDUs. For example, the MPDU may be stored by the wireless device in clear text, and the MAC header of the MPDU may be used to generate an encrypted MPDU having a MAC header set according to the address of the second wireless link.
At step 725, the re-encrypted MPDU is transmitted using a second wireless link in a multi-link operation.
With respect to fig. 8, a process of an exemplary sequence of computer implemented steps of a process 800 according to an embodiment of the present invention is depicted, the process 800 automatically retransmitting data in a multilink operation using previously encrypted MPDUs.
At step 805, the MPDU is transmitted over a first wireless link by a multi-link device. Step 805 may include: encrypt the MPDU for transmission over a first wireless link; and storing the encrypted MPDU.
At step 810, an Acknowledgement (ACK) is not received indicating that data of the MPDU needs to be retransmitted (e.g., not received).
The multi-link device optionally waits a predetermined time at step 815.
At step 820, the MAC header of the encrypted MPDU is modified to indicate: the MPDU has been encrypted for a first wireless link containing a MAC address (e.g., BandID or LinkID) of the first wireless link, the encrypted MPDU being transmitted over a second wireless link.
According to some embodiments, the peer device indicates its retransmission capabilities and/or preferred retransmission methods, and the retransmission is performed according to the indicated capabilities and/or preferences. The peer devices may negotiate an encryption method for retransmission at any time (e.g., while negotiating an encryption method). For example, when delay sensitive communications or operations (e.g., real-time audio/video communications) are involved, a peer device may request or indicate that a different retransmission method be used.
Exemplary computer control System
Embodiments of the present invention relate to electronic systems configured to perform multilink operations including retransmissions using different wireless links. The following discussion describes exemplary electronic or computer systems that may be used as platforms to implement embodiments of the present invention. For example, exemplary computer system 1012 may be a multi-link wireless device including a multi-link wireless access point or a multi-link wireless station. A multi-link device may simultaneously operate multiple transceivers to perform multi-link operations, including retransmission using different wireless links. For example, the multi-link device may transmit the encrypted MPDU using the first wireless link and retransmit the MPDU using the second wireless link by setting a MAC header of the MPDU according to a MAC address of the second wireless link.
In the example of fig. 9, an exemplary computer system or wireless device includes a central processing unit (e.g., processor or CPU)901 for running software applications and optionally an operating system. The read only memory 902 and the random access memory 903 store application programs and data used by the CPU 901. Data storage device 904 provides non-volatile storage of applications and data, and may include a fixed disk drive, a removable disk drive, a flash memory device, and a CD-ROM, DVD-ROM, or other optical storage device. Optional user inputs 906 and 907 include devices (e.g., a mouse, joystick, camera, touch screen, and/or microphone) that communicate input from one or more users to computer system 912.
Communication or network interface 908 comprises a plurality of transceivers and allows computer system 912 to communicate with other computer systems, networks, or devices via an electronic communication network, including wired and/or wireless communication, and including the Intranet or Internet (e.g., 802.11 wireless standards). In accordance with an embodiment of the present invention, the communication or network interface 908 may simultaneously operate multiple transceivers to perform multi-link operations including retransmissions using different wireless links. The communication or network interface 908 further includes a collaboration management unit for coordinating data transmitted and/or received by the transceiver. The communication or network interface 908 may also include a dual band interface that operates in multiple frequency bands simultaneously, such as 2.4GHz, 5GHz, and/or 6 GHz.
Some embodiments may be described in the general context of computer-executable instructions, such as program modules, executed by one or more computers or other devices. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. Typically, the functionality of the program modules may be combined or distributed as desired in various embodiments.
Thus, embodiments of the present invention are described. While the present invention has been described in particular embodiments, it should be appreciated that the present invention should not be construed as limited by such embodiments, but rather construed according to the below claims.
Claims (20)
1. A method of data retransmission over multiple wireless links using a multi-link device, comprising:
transmitting an encrypted medium access control protocol data unit including an authentication data portion over a first radio link of the multi-link device;
including a medium access control header corresponding to the first radio link in the authentication data portion; and
determining, using the medium access control header, that the encrypted medium access control protocol data unit requires retransmission on a second wireless link of the multi-link device.
2. The method for data retransmission over multiple wireless links using a multi-link device according to claim 1, further comprising: and storing the plaintext media access control protocol data unit of the encrypted media access control protocol data unit.
3. The method for data retransmission over multiple wireless links using a multi-link device according to claim 2, further comprising: re-encrypting the stored clear media access control protocol data unit using the media access control header corresponding to the second wireless link of the media access control protocol data unit in the authentication data portion in the encrypted media access control protocol data unit.
4. The method for data retransmission over multiple wireless links using a multi-link device according to claim 1, further comprising: retransmitting the re-encrypted medium access control protocol data unit over the second wireless link.
5. The method for data retransmission over multiple wireless links using a multi-link device according to claim 1, further comprising: a link establishment procedure is negotiated with a peer wireless device.
6. The method of claim 5, wherein negotiating link establishment procedures with peer wireless devices comprises negotiating medium access control address selection, wherein the medium access control address selection comprises at least one of: a medium access control-service address point address, a wireless medium-medium access control address, and a virtual address.
7. The method for data retransmission over multiple wireless links using a multi-link device according to claim 1, further comprising: a method for retransmission of a medium access control protocol data unit is determined over the second wireless link.
8. The method of claim 1, wherein the step of determining that the encrypted mac pdu requires retransmission comprises: determining that a wireless link between the peer devices is unavailable for medium access control protocol data unit transmissions and determining that a different wireless link between the peer devices is available for medium access control protocol data unit transmissions.
9. The method of claim 1, wherein the step of determining that the encrypted mac pdu requires retransmission comprises: determining that the multi-link device is transmitting delay-sensitive data over the first wireless link and the second wireless link.
10. The method of claim 1, wherein the step of re-encrypting the plaintext mac protocol data units over the second wireless link of the multilink device comprises: a request is sent from an upper layer of the multi-link device to a lower layer of the multi-link device to re-encrypt the medium access control protocol data unit.
11. The method of claim 10, wherein the upper layer comprises an application layer.
12. The method of claim 10, wherein the lower layer comprises a medium access control layer.
13. A method of data retransmission over multiple wireless links using a multi-link device, comprising:
transmitting an encrypted media access control protocol data unit on a first radio link of the multi-link device;
modifying a medium access control header of the encrypted medium access control protocol data unit to indicate that the encrypted medium access control protocol data unit is encrypted using a medium access control address of the first wireless link; and
retransmitting the encrypted medium access control protocol data unit with the modified medium access control header over the second wireless link.
14. The method for data retransmission over multiple wireless links using a multi-link device according to claim 13, further comprising: a link establishment procedure is negotiated with a peer wireless device.
15. The method for data retransmission over multiple wireless links using a multi-link device according to claim 13, further comprising: determining that the multi-link device is transmitting delay-sensitive data over the first wireless link and the second wireless link.
16. A multi-link device for performing data retransmission using multiple wireless links, comprising:
a first transceiver configured to transmit and receive data on a first wireless link of the multi-link device;
a second transceiver configured to transmit and receive data over a second wireless link of the multi-link device;
a memory for storing a plurality of media access control protocol data units; and
a processor operative to cause the plurality of transceivers to:
transmitting an encrypted medium access control protocol data unit including an authentication data portion over a first radio link of the multi-link device;
including a medium access control header corresponding to the first radio link in the authentication data portion; and
determining that the encrypted medium access control protocol data unit requires retransmission over a second wireless link of the multi-link device using the medium access control header.
17. The multi-link device for performing data retransmission using multiple wireless links according to claim 16, wherein the processor is further operative to store the encrypted mac protocol data units as plaintext mac protocol data units in the memory.
18. The multi-link device for performing data retransmission using multiple wireless links according to claim 16, wherein the processor is further operative to retransmit re-encrypted mac protocol data units over the second wireless link.
19. The multi-link device performing data retransmission using multiple wireless links according to claim 16, wherein the processor is further operative to negotiate a link establishment procedure with a peer wireless device.
20. The multi-link device for performing data retransmission using multiple wireless links according to claim 19, wherein negotiating a link establishment procedure with a peer wireless device comprises negotiating a medium access control address selection, wherein the medium access control address selection comprises at least one of: a medium access control-service address point address, a wireless medium-medium access control address, and a virtual address.
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| US16/941,357 US11540168B2 (en) | 2019-08-05 | 2020-07-28 | Apparatus and methods of packet retransmission between multi-link devices |
| US16/941,357 | 2020-07-28 |
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| DE102020120276A1 (en) | 2021-02-11 |
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