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Communication apparatus, control method, and storage medium

A technology of a communication device and a control unit, which is applied in the field of wireless communication technology and can solve the problems of equipment frequently updating GTK, frequent link switching, link disconnection, etc.

Pending Publication Date: 2022-07-29
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another problem includes: In multi-link communication, due to hardware limitations of wireless communication devices, there are APs or STAs that cannot perform receiving operations with other links while performing transmission operations with a predetermined link
[0007] On the other hand, in multi-link communication, there may be situations where only one or more links are disconnected while other links remain connected
Also, depending on the communication environment, frequent link switching may be expected
In this case, it is conceivable that although the status of the device has not changed, the device that has not disconnected or switched the link needs to update the GTK frequently
However, for devices connected via multiple links, it is conceivable that when communication with one or more links is interrupted, the device can maintain a connection with the AP via other links, which means that there is no need to update GTK

Method used

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  • Communication apparatus, control method, and storage medium
  • Communication apparatus, control method, and storage medium
  • Communication apparatus, control method, and storage medium

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0071] In Example 1, AP 101 forms a network with six channels in the 2.4GHz band and a link ID of 1, a network with 36 channels in the 5GHz band and a link ID of 2, and a network with a link ID of 2 in the 6GHz band 5.955GHz in the network with link ID 3. STA 102 joins the network with link ID 1 via link 104a and joins the network with link ID 2 via link 104b. STA 103 joins the network with link ID 1 via link 105a and joins the network with link ID 3 via link 105b.

[0072] In this state (eg, the communication state), STA 102 leaves the network with link ID 1 to which it joined and joins the network with link ID 3 as an example. In other words, in this example, STA 102 is disconnected from the link with link ID 1 and connected to the link with link ID 3 ( Figure 4A "No" in step S402).

[0073] This means that, in this case, one STA MLD joining the network formed by the link with link ID 1 leaves the network. However, since the STA 102 continues to be connected to the AP 1...

example 2

[0077] In Example 2, AP 101 forms a network with 6 channels in the 2.4GHz band and a link ID of 1, a network with 36 channels in the 5GHz band and a link ID of 2, and a network with a link ID of 2 in the 6GHz band 5.955GHz in the network with link ID 3. STA 102 joins the network with link ID 1 via link 104a and joins the network with link ID 2 via link 104b. STA 103 joins the network with link ID 1 via link 105a and joins the network with link ID 3 via link 105b.

[0078] For example, in this state, the STA 102 leaves from all the networks it joined. In other words, in this example, the STA 102 is disconnected from the link whose link ID is 1 and the link whose link ID is 2 ("Yes" in step S402).

[0079] This means that, in this case, one STA MLD joining the network formed by the link with link ID 1 leaves the network. Also, all connections between AP 101 and STA 102 are severed. However, the STA 103 joins the network formed by the link whose link ID is 1 ("Yes" in step S4...

example 3

[0083] In Example 3, AP 101 forms a network with 6 channels in the 2.4GHz band and a link ID of 1, a network with 36 channels in the 5GHz band and a link ID of 2, and a network with a 6GHz band 5.955GHz network with link ID 3. STA 102 joins the network with link ID 1 via link 104a and joins the network with link ID 2 via link 104b. STA 103 joins the network with link ID 1 via link 105a and joins the network with link ID 2 via link 105b.

[0084] In this state, STA 102 leaves the network with link ID 2 to which it joined and joins the network with link ID 3 as an example. In other words, in this example, STA 102 is disconnected from the link with link ID 2 and connected to the link with link ID 3 ( Figure 4A "No" in step S402).

[0085] In this case, since the STA MLD is not newly connected to or disconnected from the network formed by the link with the link ID of 1, the AP 101 maintains the group key for the link with the link ID of 1 (step S410 in step S410). "No", step ...

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PUM

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Abstract

The invention provides a communication apparatus, a control method, and a storage medium. A communication device complying with the IEEE 802.11 series standard is capable of multi-link communication with a plurality of other communication devices using a plurality of links having different frequency channels. The communication device generates, for each of the plurality of links, a key for encrypting a frame to be communicated; receiving, from a first communication device among the plurality of other communication devices, a notification indicating to disconnect or suspend one or more of the plurality of links; confirming a communication state between the plurality of other communication devices and the communication device via the plurality of links when the notification is received; and determining whether to regenerate a key for each of the plurality of links based on a result of the confirmation.

Description

technical field [0001] The present invention generally relates to a communication device, a control method and a storage medium, and in particular, to a wireless communication technology. Background technique [0002] With the increase in the amount of data traffic in recent years, the development of wireless local area network (LAN) communication technology is also progressing. The Institute of Electrical and Electronics Engineers (IEEE) 802.11 series of standards is known as the main standard for wireless LANs. The IEEE 802.11 series of standards includes standards such as IEEE 802.11a / b / g / n / ac / ax and the like. For example, IEEE 802.11ax is a standard for a technology that uses Orthogonal Frequency Division Multiple Access (OFDMA) to increase communication speeds in congested conditions while having a high peak throughput of up to 9.6 gigabits per second (Gbps) (Japanese Patent Laid-Open No. 2018-50133). [0003] A task group was created to study IEEE 802.11be (successo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W12/00H04W12/041H04B7/06
CPCH04W12/041H04W12/009H04B7/0626H04L9/0891H04L9/0833H04W84/12H04W76/15H04L63/061H04W72/121H04W74/0816
Inventor 吉川佑生
Owner CANON KK