阅读说明：本技术 无线通信方法 (Wireless communication method ) 是由 石镕豪 刘剑函 王超群 易志熹 于 2020-03-04 设计创作，主要内容包括：本发明提供一种无线通信方法。无线通信方法使用前导码穿孔的PPDU进行,包括：穿孔80MHz信道的20MHz信道；在固定长度的SIG字段中编码被穿孔的20MHz信道的指示；以及在该80MHz信道的主要20MHz信道上的前导码穿孔的PPDU中发送该固定长度的SIG字段。本发明的无线通信方法可以有效地使用运行主要服务的信道。(The invention provides a wireless communication method. The wireless communication method is performed using a preamble punctured PPDU, and includes: puncturing a 20MHz channel of an 80MHz channel; encoding an indication of the punctured 20MHz channel in the fixed length SIG field; and transmitting the fixed length SIG field in a preamble punctured PPDU on a primary 20MHz channel of the 80MHz channel. The wireless communication method of the present invention can effectively use a channel operating a primary service.)

1. A wireless communication method using a preamble punctured PPDU, the wireless communication method comprising:

puncturing a 20MHz channel of an 80MHz channel;

encoding an indication of the punctured 20MHz channel in the fixed length SIG field; and

the fixed length SIG field is transmitted in a preamble punctured PPDU on a primary 20MHz channel of the 80MHz channel.

2. The wireless communication method of claim 1, wherein the 80MHz channel comprises the primary 20MHz channel, a 20MHz secondary channel, and a 40MHz secondary channel, and wherein said puncturing comprises puncturing the 20MHz secondary channel.

3. The wireless communication method of claim 1, wherein the 80MHz channel comprises a primary 20MHz channel, a 20MHz secondary channel, a 40MHz left secondary channel, and a 40MHz right secondary channel, and wherein the puncturing comprises puncturing the 40MHz left secondary channel.

4. The wireless communication method of claim 2, wherein the bandwidth field of the preamble punctured PPDU comprises a value of 4.

5. The wireless communication method of claim 3, wherein the bandwidth field of the preamble punctured PPDU comprises a value of 5.

6. The wireless communication method of claim 1, further comprising performing a MU-RTS-trigger/CTS frame exchange.

7. The wireless communication method of claim 6, wherein performing a MU-RTS trigger/CTS frame exchange comprises: simultaneous CTS frame responses are requested from multiple wireless STAs.

8. The method of claim 7, wherein the MU-RTS trigger frame of the MU-RTS trigger/CTS frame exchange includes a disallowed subchannel bitmap in a user information field indicating disallowed 20MHz subchannels and disallowed 242 tone resource units.

9. The method of claim 8, wherein the AID12 subfield of the MU-RTS trigger frame is set to a value of 2047.

10. A wireless communication method using a preamble punctured PPDU, the wireless communication method comprising:

puncturing a 20MHz channel of 160MHz channels;

encoding an indication of the punctured 20MHz channel in the fixed length SIG field; and

the fixed length SIG field is transmitted in a preamble punctured PPDU on the primary and secondary channels of the 160MHz channel.

11. The method of claim 10, wherein the 160MHz channels comprise 80+80MHz channels.

12. The method of claim 10, wherein a bandwidth field of the preamble punctured PPDU includes a value of 6 indicating that a secondary 20MHz channel of a primary 80MHz channel is punctured.

13. The wireless communication method of claim 10, wherein the bandwidth field of the preamble punctured PPDU includes a value of 7 indicating that a primary 40MHz channel of a primary 80MHz channel is punctured.

14. The wireless communication method of claim 10, wherein one, two, or three 20MHz channels of the secondary 80MHz channels are punctured.

15. A wireless communication method for EHT cooperative multiband operation using preamble punctured PPDU, comprising:

puncturing a 20MHz channel of the first wireless channel;

encoding an indication of the punctured 20MHz channel in the fixed length SIG field; and

transmitting the fixed length SIG field in a preamble-punctured PPDU to a wireless STA on the first wireless channel, wherein the preamble-punctured PPDU comprises two PPDUs of the wireless STA in a first resource unit for the first wireless channel and a second resource unit for a second wireless channel, wherein the wireless STA is configured to transmit and receive data simultaneously on the first and second wireless channels.

16. The wireless communication method of claim 15, further comprising: the wireless STA performs cooperative multiband operation using the first wireless channel and the second wireless channel simultaneously.

17. The wireless communication method of claim 15, wherein the wireless STA comprises two transceivers for performing cooperative multiband operation.

18. The method of claim 17, wherein the two transceivers comprise a 2.4GHz transceiver and a 5GHz transceiver.

19. The method of claim 17, wherein the two transceivers comprise a 5GHz transceiver and a 6GHz transceiver.

20. The wireless communications method of claim 15, further comprising performing a MU-RTS-trigger/CTS frame exchange.

[ technical field ] A method for producing a semiconductor device

Embodiments of the invention relate generally to the field of wireless communications. More particularly, embodiments of the present invention relate to systems and methods for providing a punctured preamble to support legacy devices in a channel (e.g., 80 or 160MHz channel) on which a primary service is operating.

[ background of the invention ]

Unless otherwise indicated, the approaches described in this section are not prior art to the present application and are not admitted to be prior art by inclusion in this section.

The 2.4GHz and 5GHz Wi-Fi signal ranges are divided into a series of smaller channels and Wi-Fi network devices (e.g., wireless access points or stations) are able to use these channels for data communications. When a wireless Access Point (AP) transmits data to a wireless Station (STA), different channels may be affected by different sources of wireless interference, and the type and amount of interference may vary over time. Thus, a typical wireless AP will intermittently switch channels based on the level of interference or traffic detected on the current channel.

Some wireless stations are only capable of transmitting and receiving data using a channel bandwidth of 20MHz (e.g., "20 MHz only" devices). Currently, these devices are limited to primary 20MHz wide operating channels (primary 20MHz width operating channels). However, limiting the devices to operate only on the primary 20MHz bandwidth operating channel may result in poor network performance. For example, if a 20MHz operating (operating) non-AP HE STA is a receiver of a 40MHz, 80+80MHz, or 160MHz HE MU PPDU (physical layer convergence protocol (PLCP) protocol data unit), or a transmitter of a 40MHz, 80+80MHz, or 160MHz HE MU PPDU, the RU frequency tone (tone) mapping in the 20MHz channel is not properly aligned (RU) tone mapping with the 40MHz, 80+80MHz, or 160MHz resource units. The performance of the 20MHz operating STA is limited because the 20MHz operating STA can only use the primary 20MHz channel. In order for an AP to be able to utilize the entire 80MHz bandwidth, a STA operating at 20MHz must be capable of wideband OFDMA. OFDMA transmissions involving STAs operating at 20MHz mixed with STAs supporting 80MHz may result in similar performance limitations.

Similar problems exist for 80MHz operating STAs when they are connected to a 160MHz/80+80MHz BSS. Since the 80MHz operating STA can only use the primary 80MHz channel, the performance of the 80MHz operating STA is limited. In order for the AP to utilize the entire 160MHz/80+80MHz bandwidth, the 80MHz working STA must be capable of wideband Orthogonal Frequency Division Multiple Access (OFDMA).

Overlapping Basic Service Set (BSS) operation in the primary 80MHz channel is not recommended for performance and efficiency. In general, if an AP or a mesh (mesh) STA starts a VHT BSS occupying part or all of the channels of any existing BSS, the AP or the mesh STA may select a main channel of a new Very High Throughput (VHT) BSS, which is the same as the main channel of any existing BSS. If the AP or mesh STA selects the primary channel of a new VHT BSS with a BSS bandwidth of 40MHz, 80MHz, 160MHz, or 80+80MHz from the channels in which beacons are not detected during OBSS scanning, the selected primary frequency channel meets the following condition:

it is different from the auxiliary 20MHz channel of any existing BSS having 40MHz, 80MHz, 160MHz or 80+80MHz BSS bandwidths.

It does not overlap with the auxiliary 40MHz channel of any existing BSS with 80MHz, 160MHz or 80+80MHz BSS bandwidth.

STAs that are APs or mesh STAs do not start a VHT BSS having a 20MHz BSS bandwidth on a channel that is an auxiliary 20MHz channel of any existing BSS having a 40MHz, 80MHz, 160MHz or 80+80MHz BSS bandwidth or overlapping an auxiliary 20MHz channel of an existing BSS having a 160MHz or 80+80MHz BSS bandwidth.

For these reasons, overlapping bsss (obss) rarely occupy only the secondary 20MHz channel or only the secondary 40MHz channel. On the other hand, OBSS will frequently occupy 20MHz channels of the secondary 80MHz channels. However, in this case, the performance of the 160/80+80MHz, 240/80+80+80MHz, 320/80+80+80 MHz channels may be degraded. Furthermore, the U-NIIMid and U-NII Worldwide bands at 5GHz are affected by Dynamic Frequency Selection (Dynamic Frequency Selection), while the band at 6GHz may have some limitations (e.g., Dynamic Frequency Selection).

Furthermore, the occupied bandwidth of primary service (e.g., Terminal Doppler Weather Radar (TDWR)) is less than 20MHz (e.g., Radar bandwidth of several MHz). However, the typical operating bandwidth for 802.11ac and 802.11ax BSS is 80 MHz. When an 802.11ac BSS or 802.11axBSS operates in an 80MHz channel where primary services are present, the BSS is limited to a 20MHz BSS or a 40MHz BSS to protect the primary services. Therefore, one common approach is to switch the operating channel of the BSS to another 80MHz channel, rather than reducing the bandwidth of the BSS from 80MHz to 40MHz or 20 MHz. As a result, the efficiency of the 80MHz channel running the primary service is relatively low.

Therefore, a mechanism is needed to efficiently use the channels (e.g., 80 or 160MHz channels) that run the primary service.

[ summary of the invention ]

The following summary is illustrative only and is not intended to be in any way limiting. That is, the following summary is provided to introduce the concepts, benefits and advantages of the novel and advanced technology described herein. The selection implementation is further described below in the detailed description. Thus, the following summary is not intended to identify essential features of the claimed subject matter, nor is it intended for use in determining the scope of the claimed subject matter.

According to exemplary embodiments of the present invention, the following methods and corresponding apparatuses are proposed to solve the above-mentioned problems.

In accordance with an embodiment of the present invention, there is provided a wireless communication method using a PPDU with punctured preamble, the wireless communication method including: puncturing a 20MHz channel of an 80MHz channel; encoding an indication of the punctured 20MHz channel in the fixed length SIG field; and transmitting the fixed length SIG field in a preamble punctured PPDU on a primary 20MHz channel of the 80MHz channel.

In accordance with another embodiment of the present invention, there is provided a wireless communication method using a PPDU with punctured preamble, the wireless communication method including: puncturing a 20MHz channel of 160MHz channels; encoding an indication of the punctured 20MHz channel in the fixed length SIG field; and transmitting the fixed length SIG field in a preamble punctured PPDU on a primary channel and a secondary channel of the 160MHz channel.

In accordance with an embodiment of the present invention, there is provided still another wireless communication method using a preamble punctured PPDU for EHT cooperative multiband operation, the wireless communication method including: puncturing a 20MHz channel of the first wireless channel; encoding an indication of the punctured 20MHz channel in the fixed length SIG field; and transmitting the fixed length SIG field in a preamble-punctured PPDU to a wireless STA on the first wireless channel, wherein the preamble-punctured PPDU includes two PPDUs for the wireless STA in a first resource unit for the first wireless channel and a second resource unit for a second wireless channel, wherein the wireless STA is configured to concurrently transmit and receive data on the first and second wireless channels.

The wireless communication method of the present invention can enable a wireless device to efficiently use a channel on which a primary service is operating.

[ description of the drawings ]

The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this disclosure. The drawings illustrate embodiments of the disclosure and together with the description serve to explain the principles of the disclosure. It will be appreciated that the drawings are not necessarily to scale, since some features may be shown out of proportion to actual implementation dimensions in order to clearly illustrate the concepts of the present disclosure.

Fig. 1 depicts an exemplary frequency spectrum for 5GHz communications.

Fig. 2 depicts an exemplary frequency spectrum for 6GHz communication.

Fig. 3 depicts an exemplary transmission timing diagram depicting an AP performing OFDMA transmissions to service multiple STAs, in accordance with an embodiment of the present invention.

Fig. 4 is a transmission timing diagram depicting an exemplary wideband channel access mechanism for STAs operating at 20MHz/80MHz in which STAs operating at 20MHz/80MHz may dynamically move to a supplemental channel in accordance with an embodiment of the present invention.

Fig. 5A is a transmission timing diagram depicting a mode (mode 1) for wireless communication in an 80MHz frequency band using a punctured preamble, according to an embodiment of the invention.

Fig. 5B shows a transmission timing diagram depicting a mode (mode 2) for wireless communication in an 80MHz frequency band using a punctured preamble according to an embodiment of the present invention.

Fig. 6A is a transmission timing diagram depicting a mode (mode 3) for wireless communication in a 160MHz band using a punctured preamble according to an embodiment of the invention.

Fig. 6B depicts a transmission timing diagram for a mode (mode 4) for wireless communication in a 160MHz band using a punctured preamble, according to an embodiment of the invention.

Fig. 7 depicts a transmission timing diagram for mode (mode 4) of wireless communication in a 160MHz band using a punctured preamble, according to an embodiment of the invention.

Fig. 8 is a transmission timing diagram depicting an exemplary MU-RTS trigger/CTS frame exchange, in accordance with embodiments of the present invention.

Fig. 9 is a transmission timing diagram describing an exemplary MU-RTS trigger/CTS frame exchange for a preamble punctured PPDU in accordance with an embodiment of the present invention.

Fig. 10 is a transmission timing diagram depicting an exemplary MU-RTS trigger/CTS frame exchange for indicating disallowed sub-channels for STAs using preamble punctured PPDUs, in accordance with an embodiment of the invention.

Fig. 11 depicts 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. 12 is a transmission timing diagram describing an exemplary EHT cooperative multiband operation applied to a preamble punctured PPDU according to an embodiment of the present invention.

Fig. 13 is a transmission timing diagram depicting an exemplary EHT cooperative multiband operation applied to a preamble-punctured PPDU, where each PSDU is addressed to a single STA, according to an embodiment of the present invention.

Fig. 14 is a transmission timing diagram depicting an exemplary EHT cooperative multiband operation, in accordance with embodiments of the present invention.

Fig. 15 is a transmission timing diagram depicting exemplary EHT cooperative multiband operation of embodiments of the present invention.

Fig. 16 shows an example of a transmission timing chart.

Fig. 17A depicts an exemplary sequence of computer implemented steps for performing wireless communications using a preamble punctured PDDU in an 80MHz channel in accordance with an embodiment of the present invention.

Fig. 17B depicts an exemplary sequence of computer implemented steps for performing wireless communications using a preamble punctured PDDU in a 160MHz channel in accordance with an embodiment of the present invention.

Fig. 18 depicts an exemplary sequence of computer-implemented steps for wireless communication for cooperative multi-band operation using preamble punctured PDDUs in accordance with an embodiment of the present invention.

FIG. 19 shows an example computer system.

[ detailed description ] embodiments

The following description is the best mode for carrying out the invention. This description is made for the purpose of illustrating the general principles of the present invention and should not be taken in a limiting sense. The scope of the invention is determined by reference to the appended claims.

Certain terms are used throughout the description and claims to refer to particular components. As one skilled in the art will appreciate, electronic device manufacturers may refer to a component by different names. This document does not intend to distinguish between components that differ in name but not function. In the following specification and claims, the word "comprise" is an open-ended term, and thus should be interpreted to mean "including, but not limited to …". Additionally, the term "coupled" is intended to mean either an indirect electrical connection or a direct electrical connection. Thus, when one device is coupled to another device, that connection may be through a direct electrical connection or through an electrical connection via other devices and connections.

Reference will now be made in detail to several embodiments. 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 set forth in order to provide a thorough understanding of claimed subject matter. However, it will be recognized by one skilled in the art that 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 herein (e.g., fig. 17A, 17B, and 18) 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 flowcharts of the figures herein, and in a sequence other than that depicted and described herein.

Some portions of the detailed description are 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," "writing," "including," "storing," "transmitting," "associating," "identifying," "encoding," or the like, refer to the action 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.

Enhanced preamble punctured PPDU

As used herein, the term "EHT" refers to the latest generation of wireless communication (Wi-Fi) referred to as very high throughput (EHT) and is defined in accordance with the IEEE 802.11be standard. The term Station (STA) may refer to an electronic device capable of transmitting and receiving data over Wi-Fi, which device does not operate as an Access Point (AP).

Embodiments of the present invention provide a punctured preamble that enables wireless devices to efficiently use the channel (e.g., 80 or 160MHz channel) on which the primary service is operating. A wideband channel access mechanism for 20MHz/80MHz operating STAs is provided so that the 20MHz/80MHz operating STAs can dynamically move to a secondary channel to improve the wireless performance of the STAs. The AP coordinates the switching of the operating channels of the 20MHz/80MHz operating STAs. The EHT cooperative multiband operation may be applied to the preamble-punctured PPDU to simultaneously perform the multiband operation.

As shown in fig. 1 and 2, new frequency spectrums/channels become available for 5GHz and 6GHz wireless communications. Fig. 1 depicts an exemplary frequency spectrum 100 for 5GHz communications, and fig. 2 depicts an exemplary frequency spectrum 200 for 6GHz communications. Post AX (Post-AX) technology includes mechanisms to efficiently use the new channel available for 6GHz communication. For example, for 80MHz multiple (Multi-80MHz) BSS operation, the following modes may be used in the 6GHz spectrum:

continuous 160MHz or discontinuous 80+80MHz

Continuous 240MHz or discontinuous 80+80+80MHz

Continuous 320MHz or discontinuous 80+80+80+80MHz

Fig. 3 depicts an exemplary transmission timing diagram 300 depicting an AP performing OFDMA transmissions to service multiple STAs, in accordance with an embodiment of the present invention. Some STAs are only 20MHz STAs and some STAs are 80MHz capable STAs. As shown in fig. 3, only the 20MHz STAs (STA1 and STA2) operate on the primary 20MHz channel 305. An 80MHz capable STA operates on a secondary 40MHz channel 310 and may share a primary 40MHz channel 315 with only 20MHz STAs. In order for the AP to utilize the entire 80MHz bandwidth, 20MHz working STAs are required to participate in wideband OFDMA. Similarly, in order for the AP to utilize the entire 160MHz/80+80MHz bandwidth, 80MHz working STAs are required to participate in wideband OFDMA.

The 20 MHz-only non-AP STA is subject to several specific limitations for allocating RUs to the 20 MHz-only non-AP STA. If the 20MHz operating non-AP HE STA is a receiver of a 40MHz, 80+80MHz, or 160MHz HE MU PPDU or a transmitter of a 40MHz, 80+80MHz, or 160MHz HE TB PPDU, the RU frequency tone mapping of the 20MHz channel will not align with the 40MHz, 80+80MHz, or 160MHz RU frequency tone mapping. Thus, the AP must not allocate the 26-tone RUs 5 and 14 of the 40MHz HE MU PPDU and HE TB PPDU to a 20MHz operating non-AP HE STA. Furthermore, the AP must not allocate the following RUs to non-AP HE STAs operating at 20 MHz:

80MHz 26 tone RUs 5, 10, 14, 19, 24, 28, and 33 of HE MU PPDU and HE TB PPDU

80+80MHz and Low (lower)80MHz 26 tone RUs 5, 10, 14, 19, 24, 28, and 33 of 160MHz HE MU PPDU and HE TB PPDU

High (upper)80MHz 26 tone RUs 5, 10, 14, 19, 24, 28 and 33 of 80+80MHz HE MU PPDU and HE TB PPDU

non-AP HE STAs capable of reaching 80MHz channel width are also limited and RUs cannot be allocated to non-AP STAs with 80MHz capability. For example, when operating with a channel width of 80MHz, the STA should indicate support for reception of 160MHz or 80+80MHz HE MU PPDU, or support for transmission of 160MHz or 80+80MHz HE TB PPD U in a sub-field (subfield) of 160/80+80MHz HE PPDU, which is located in a HE PHY capability element (Capabilities Information) field in a HE capability element (Capabilities element). Further, when an RU in a 160MHz or 80+80MHz HE MU PPDU or HE TB PPDU is allocated to the non-AP HE STA (when operating in the 80MHz channel width mode, a value subfield of the 160MHz or 80+80MHz HE MU PPDU in the HEPHY capability information field in the HE capability element is set to 1), the HEAP STA does not allocate an RU outside the main 80 MHz.

Fig. 4 is a transmission timing diagram 400 illustrating an exemplary wideband channel access mechanism for STAs operating at 20MHz/80MHz in which STAs operating at 20MHz/80MHz may dynamically move to a supplemental channel in accordance with an embodiment of the present invention. The AP coordinates the switching of the operating channels of the 20MHz/80MHz operating STAs. As shown in fig. 4, an 80MHz capable STA may share 40MHz primary and secondary channels with only 20MHz STAs. In the first example, only 20MHz STAs 1, 2, and 3 operate on the primary 40MHz channel 405 and only 20MHz STAs 5 and 6 operate on the secondary 40MHz channel 410. The 80MHz capable STAs 4 and 7 operate on the primary 40MHz channel and the secondary 40MHz channel 405/410, respectively, and share the primary 40MHz channel and the secondary 40MHz channel with only 20MHz STAs.

For HE subchannel selective transmission (SST for short), HE SST STAs may establish SST operation by negotiating trigger-enabled TWTs as defined in 26.8.2 (Individual latency protocol):

the TWT request may have a TWT channel field with at most one bit set to 1 to indicate which secondary channel is requested to contain an RU Allocation (Allocation) addressed to (addressed to) the HE SST STA as a 20MHz operating STA.

A TWT request may have a TWT channel field with all four LSBs or all four MSBs set to 1 to indicate whether the primary 80MHz channel or the secondary 80MHz channel is requested to contain an RU allocation addressed to the HE SSTSTA, which is an 80MHz working STA.

The TWT response has a TWT channel field with at most one bit set to 1 to indicate which supplemental channel will contain an RU allocation addressed to the HE SST STA, which is a 20MHz operating STA.

The TWT response has a TWT channel field with all 4 LSBs or all 4 MSBs indicating whether the primary 80MHz channel or the secondary 80MHz channel.

HE SST STAs that successfully establish SST operation follow the rules defined in 26.8.2 (individual TWT protocol) to exchange frames with HE SST STAs during the negotiated trigger-enabled TWT SP, except that the AP ensures:

if the SST STA is a 20MHz operating STA, the RU allocated in the DL MU PPDU and trigger frame addressed to the SST STA is within the subchannel indicated in the TWT channel field of the TWT response and follows the RU restriction rules defined in 27.3.2.8 (RU restriction for 20MHz operation).

The trigger-enabled TWT SP does not overlap with the TBTT that sent the DTIM Beacon frame.

The same subchannel is used for all trigger-enabled TWT SPs that overlap in time.

HE SST STAs follow the rules defined in 26.8.2 (individual TWT protocol) to exchange frames with HE SST AP during the negotiated trigger-enabled TWT SP, except that the STAs:

at the TWT start time, available in the sub-channel indicated in the TWT channel field of the TWT response.

No access to the media in the sub-channels using DCF or EDCAF.

Unless a CCA is performed, it does not respond to trigger frames sent to it (see 26.5(MU operation) and 26.8.2 (individual TWT protocol)) until a frame is detected whose NAV (Network allocation vector) can be set or until a period equal to NAVSyncDelay occurs (whichever is earlier).

If a PPDU is received in a sub-channel, its NAV is updated according to 26.2.4 (updating two NAVs).

In some cases, HE SST AP may need to change its operating channel width. For example, when an HE SST AP operating in the DFS band detects a radar signal, the HE SST AP switches its operating channel or reduces its operating channel width to avoid detected Dynamic Frequency Selection (DFS) signals. In this case, the HE SST AP may change its operating channel without separately terminating the TWT protocols associated with all HE SST STAs.

The HE selective sub-channel transmission (SST) AP may transmit a channel switch announcement frame or an extended channel switch announcement frame to switch its operation channel, or transmit an operation mode notification frame and an operation mode notification element. The trigger-enabled TWT SPs associated with the negotiated secondary channel may automatically terminate when the HE SST AP's operating channel is changed to a channel that does not cover the negotiated secondary channel. The HE SST STA may also terminate the negotiated trigger-enabled TWT operation when the HE SST STA detects (by receiving a channel switch announcement frame, an extended channel switch announcement frame, an operation mode announcement frame, or an operation mode announcement element) that the HE SST AP cannot serve the negotiated trigger-enabled TWT SP (since the operation channel of the HE SST AP does not cover the negotiated auxiliary channel). The STA is not required to be available at the TWT start time in the subchannel indicated in the TWT channel field of the TWT response.

The HE SST STA may include a channel switch timing element in an association/reassociation request frame sent to the SST AP to indicate the time required for the STA to switch between different sub-channels. The received channel switch time informs the SST AP of a duration of time that the SST STA may not be available to receive frames before the TWT start time and after the trigger-enabled TWT SP ends. After the TWT SP enabling the trigger is finished, the HE SST STA in PS mode is not required to move to the primary channel.

As discussed in more detail below, the MU-RTS trigger/CTS frame exchange procedure allows the AP to initiate a TXOP and protects the TXOP frame exchange. The AP may send a MU-RTS trigger frame to request a simultaneous CTS frame response from one or more non-AP STAs. For example, for each 20MHz channel occupied by a PPDU containing a MU-RTS trigger frame, the sender of the MU-RTS trigger frame requests at least one non-AP STA to send a CTS frame response occupying the 20MHz channel. The sender of the MU-RTS trigger frame does not request the non-AP STA to send a CTS frame response in a 20MHz channel not occupied by the PPDU containing the MU-RTS trigger frame.

After sending the MU-RTS trigger frame, the AP waits for the CTSTimeout interval of the astfstime + aSlotTime + aRxPHYStartDelay, which begins when the MAC receives the PHY-txend. If the MAC does not receive the PHY-RXSTART indication primitive within the CTSTImeout interval, the AP determines that the transmission of the MU-RTS trigger frame failed. If the MU-RTS trigger frame initiates a TXOP, the AP will invoke its back-off procedure (back-offprocedure). If the MAC receives a PHY-rxstart.indication primitive within the CTSTimeout interval, the MAC waits for the corresponding PHY-rxend.indication primitive to determine whether the MU-RTS trigger frame transmission was successful. The reception of a CTS frame from any non-AP STA addressed by the MU-RTS trigger frame before the PHY-rxend.indication primitive is considered a successful transmission of the MU-RTS trigger frame, allowing the frame exchange sequence to proceed. The reception of any other type of frame is interpreted as a MU-RTS trigger frame transmission failure. Thus, the AP can process the received frame and invoke its backoff procedure at the PHY-rxend.indication primitive if the MU-RTS trigger frame initiates a TXOP.

If a non-AP STA receives an MU-RTS trigger frame, the non-AP STA starts to send a CTS frame response at an SIFS time boundary after the end of the received PPDU when the following all conditions are met:

MU-RTS trigger frame has one of the user information fields addressed to non-AP STAs. If the AID12 subfield is equal To 12 LSBs of the AID of the STA and the MU-RTS trigger Frame is transmitted by an AP associated with the non-AP STA or an AP corresponding To the transmitted BSSID (if the non-AP STA is associated with a non-transmitted BSSID), and indicates that the reception of the Control Frame with the TA field set To the transmitted BSSID is supported by setting an Rx Control Frame To a multi bss subfield (Rx Control Frame To multi bss subfield) To "1" in the HE capability element transmitted by the non-AP STA, the Control Frame indicates that the reception of the Control Frame with the TA field set To the transmitted BSSID is supported.

UL MU CS condition indicates medium idle (see 26.5.3.5(UL MU CS mechanism)).

Otherwise, the non-AP STA does not send a CTS frame response. The RU allocation subfield in the user information field addressed to the non-AP STA indicates whether the CTS frame response is sent on a primary 20MHz channel, a primary 40MHz channel, a primary 80MHz channel, a 160MHz channel, or an 80+80MHz channel (as described in 9.3.1.22.5 (MU-RTS variant)).

The ED-based CCA and virtual CS functions performed during SIFS (after receiving the MU-RTS trigger frame) are used to determine the status of the medium for responding to the MU-RTS trigger frame. The CTS frame sent in response to the MU-RTS trigger frame is transmitted at a rate of 6Mb/s in a non-HT or non-HT duplicate PPDU, and the TXVECTOR parameter SCRAMBLER _ INI-TIAL _ VALUE has the same VALUE as the RXVACTOR parameter SCRAMBLER _ INITIAL _ VALUE of the PPDU carrying the MU-RTS trigger frame. The PPDU carrying the CTS frame is transmitted on the 20MHz channel indicated in the RU allocation subfield of the user information field of the MU-RTS trigger frame. The HE SST STA cannot use the MU-RTS/CTS protection mechanism because the CTS frame response to the MU-RTS trigger frame is sent on a primary 20MHz channel, a primary 40MHz channel, a primary 80MHz channel, a 160MHz channel, or an 80+80MHz channel. For example, when an HE SST STA, which is a 20MHz/80MHz operating STA, negotiates trigger-enabled TWT SPs on secondary 20MHz/40MHz/80MHz channels, the HE SST STA does not transmit CTS frames on primary 20MHz/40MHz/80MHz channels during the respective TWT SPs.

According to some embodiments, the AP may send a MU-RTS trigger frame to request a simultaneous CTS frame response from one or more non-AP STAs. The RU allocation subfield in the user information field addressed to the non-AP STA indicates whether the CTS frame response is sent on the primary 20MHz channel, the primary 40MHz channel, the primary 80MHz channel, the 160MHz channel, or the 80+80MHz channel (as described in 9.3.1.22.5 (MU-RTS variant)). If an MU-RTS trigger frame is sent to the HE SST STA during the TWT SP where the HE SST STA negotiates the enable trigger, the RU assignment subfield sent to the HE SST STA in the user information field indicates whether the CTS frame response should be sent on the negotiated secondary channel (e.g., the subchannel indicated in the TWT channel field of the TWT response). When the HE SST STA is a 20MHz operating STA, a CTS frame response (as shown in the TWT channel field of the TWT response) is transmitted on one of the two 20MHz channels, either the secondary 20MHz channel or the secondary 40MHz channel. When the HE SST STA is an 80MHz operating STA, the CTS frame response is sent on the secondary 80MHz channel (as indicated by the TWT channel field of the TWT response). When the user information field in the MU-RTS trigger frame is addressed to the HE SST STA, the RU allocation subfield in the user information field indicates whether a CTS frame is sent on the negotiated secondary channel.

B0 of the RU allocation subfield is set to a value of 0 to indicate that the negotiated secondary channel is within the primary 80MHz channel. B0 of the RU allocation subfield is set to 1 to indicate that the negotiated supplemental channel is within the 80MHz supplemental channel. The B7-B1 of the RU allocation subfield is set to the auxiliary channel indicating the negotiated 20MHz bandwidth, as follows:

61 if the negotiated auxiliary channel is the primary 40MHz or 80MHz channel or the lowest frequency 20MHz channel in the 80MHz segment of 80+80/160MHz (if present)

62 if the negotiated auxiliary channel is the 20MHz channel of the second low frequency in the 80MHz segment (if present) of the main 40MHz or 80+80/160MHz

63 if the negotiated auxiliary channel is the primary 80MHz channel or the 20MHz channel of the third low frequency in the 80MHz segment of 80+80/160MHz (if present)

64 if the negotiated auxiliary channel is the primary 80MHz channel or the 20MHz channel of the fourth low frequency in the 80MHz segment of 80+80/160MHz (if present)

If the negotiated supplemental channel is the 80MHz segment of 80+80/160MHz, then B7-B1 of the RU assignment subfield is set to 67 to indicate the negotiated 80MHz bandwidth supplemental channel.

When the HE SST STA for a 20MHz working STA sets B7-B1 to 61-64, B0 may be set to 0 (primary 80MHz channel) or 1 (secondary 80MHz channel). However, when B7-B1 is set to 67 for HE SST STA, which is an 80MHz operating STA, B0 is set to 1 (auxiliary 80MHz channel).

When a MU-RTS trigger frame is sent to a HE SST STA during a negotiated trigger-enabled TWT SP of the HE SST STA, the AP may request a simultaneous CTS frame response from one or more non-AP STAs in the following respects:

primary 40MHz channel if the negotiated secondary channel of the HE SST STA is a secondary 20MHz channel.

Primary 80MHz channels if the negotiated secondary channel of the HE SST STA is one of the 20MHz channels of the secondary 40MHz channels.

160MHz/80+80MHz channels if the negotiated supplemental channel of the HE SST STA is an 80MHz supplemental channel.

PPDU with punctured preamble

To improve the efficiency and performance of 80MHz channels operating primary service (primary service), embodiments of the present invention provide a mode for PPDU wireless communication data using preamble puncturing. Preamble puncturing enables an 802.11ax AP to transmit a "punctured" 80MHZ channel or 160MHZ channel when some auxiliary channels are currently being used by legacy devices. In particular, 20MHz subchannels may be punctured to allow legacy systems to operate in the punctured channels. Preamble puncturing allows an AP to transmit an HE MU PPDU in a punctured 80 or 160(80+80) MHz format when a portion of the 20MHz subchannel in the supplemental channel of the channel bandwidth is busy. The 80MHz or 160MHz band is punctured on the secondary channel but not on the primary channel.

In accordance with embodiments of the present invention, several modes of preambles for implementing puncturing when transmitting HE MU PPDUs are described herein. Fig. 5A is a transmission timing diagram 500 depicting a mode (mode 1) for wireless communication in an 80MHz frequency band using a punctured preamble, in accordance with an embodiment of the present invention. In mode 1, the 80MHz radio band is divided into a primary 20MHz channel 505, a secondary 20MHz channel 510 and a secondary 40MHz channel 515. The secondary 20MHz channel 510 is punctured so that it can be used for legacy systems and devices operating in the punctured channel.

Fig. 5B shows transmission timing diagrams 520 and 550, which transmission timing diagrams 520 and 550 depict a mode (mode 2) for wireless communication in an 80MHz band using a punctured preamble, according to an embodiment of the present invention. In mode 2, the 80MHz band is divided into a primary 20MHz channel (P20)525, a secondary 20MHz channel (S20)530, and a secondary 40MHz channel (S40), the secondary 40MHz channel (S40) being subdivided into a left 20MHz channel (S40-L)535 and a right 20MHz channel (S40-R) 540. The left 20MHz channel (S40-L)535 or the right 20MHz channel (S40-R)540 of the auxiliary 40MHz channel (S40) are punctured so that legacy systems and devices can operate in the punctured channels. In the transmission timing diagram 520, the left 20MHz channel (S40-L)535 is punctured. In transmission timing diagram 5500, the right 20MHz channel (S40-R)540 is punctured.

Fig. 6A is a transmission timing diagram 600 depicting a mode (mode 3) for wireless communication in a 160MHz band using a punctured preamble, in accordance with an embodiment of the invention. In mode 3, the 160MHz band is divided into a primary 20MHz channel (P20)605, a secondary 20MHz channel (S20)610, a secondary 40MHz channel (S40)615, and a secondary 80MHz channel 620. In mode 3, the secondary 20MHz channel (S20)610 is punctured to make it available to legacy systems and devices to operate in the punctured channel.

Fig. 6B depicts transmission timing diagrams 630, 650, and 670 for a mode (mode 4) of wireless communication in a 160MHz band using a punctured preamble, according to an embodiment of the invention. In mode 4, the secondary 40MHz band (S40) is divided into a left 40MHz channel (S40-L)635 and a right 40MHz channel (S40-R) 640. The left 40MHz channel (S40-L)635 and/or the right 40MHz channel (S40-R)640 are punctured for legacy systems and devices to operate in the punctured channel or channels. Specifically, in the transmission timing diagram 630, the left 40MHz channel (S40-L)635 is punctured; in the transmission timing diagram 650, the right 40MHz channel (S40-R)640 is punctured; in the transmission timing diagram 670, both the left 40MHz channel (S40-L)635 and the right 40MHz channel (S40-R)640 are punctured.

Alternatively, mode 3 and mode 4 may be used to puncture one, two, or three 20MHz channels of the auxiliary 80MHz channel (S80), according to embodiments of the present invention. Fig. 7 depicts transmission timing diagrams 700, 725, 750, and 775 for a mode (mode 4) of wireless communication in a 160MHz band using a punctured preamble according to an embodiment of the invention. As depicted in transmission timing diagram 700, a secondary 80MHz channel (S80)705 is punctured into a single 20MHz channel 710. The 20MHz supplemental channel (S20)730 is also punctured. As shown in transmission timing diagram 725, the secondary 80MHz channel (S80)705 is punctured with two 20MHz channels 710 and 715. The 40MHz left supplemental channel (S40-L)730 is also punctured. As depicted in transmission timing diagram 750, secondary 80MHz channel (S80)705 is punctured with two 20MHz channels 710 and 720. The 40MHz right secondary channel (S40-R)735 is also punctured. As shown in the transmission timing diagram 775, the secondary 80MHz channel (S80)705 is punctured into three 20MHz channels 710, 715, and 720. The 40MHz left supplemental channel (S40-L)730 and the 40MHz right supplemental channel (S40-R)735 are also punctured.

The Mode indication (Mode indication) in the preamble punctured PPDU is encoded in a common and fixed length SIG field, which is transmitted on the primary 20MHz channel. Specifically, the bandwidth field of the HE-SIG-A field in the HE PPDU is set to 0 (for 20MHz), 1 (for 40MHz), 2 (for 80MHz non-preamble puncturing pattern), 3 (for 160MHz and 80+80MHz non-preamble puncturing pattern), 4 (for preamble puncturing in 80MHz, where only the secondary 20MHz is punctured in the preamble (mode 1)), 5 (for preamble puncturing in 80MHz, where only one of the two 20MHz sub-channels in the secondary 40MHz is punctured in the preamble (mode 2)), 6 (for preamble puncturing in 160MHz or 80+80MHz, where only the secondary 20MHz is punctured in the primary 80MHz of the preamble (mode 3)), or 7 (for preamble puncturing in 160MHz or 80+80MHz, where the primary 40MHz in the primary 80MHz of the preamble is punctured (mode 4)).

In modes 3 and 4, when puncturing one, two, or three 20MHz channels of the secondary 80MHz channel, an indication of the punctured 20MHz channel of the 80MHz secondary channel in the preamble punctured PPDU may be encoded in a user specific and variable length SIG field (e.g., HE-SIG-B in the HE PPDU) transmitted on the primary and secondary channels.

MU-RTS and CTS mechanism for punctured preamble PPDU

The MU Send Request (RTS) trigger/Send Clear (CTS) frame exchange procedure allows the AP to initiate Transmission Opportunity (TXOP) and protects TXOP frame exchange. The AP may send a MU-RTS trigger frame to request a simultaneous CTS frame response from one or more non-AP STAs. Fig. 8 is a transmission timing diagram 800 depicting an exemplary MU-RTS trigger/CTS frame exchange, in accordance with an embodiment of the invention. In each 20MHz channel occupied by a PPDU containing a MU-RTS trigger frame, the sender of the MU-RTS trigger frame should request at least one non-AP STA to send CTS frame responses 805 and 810 occupying the 20MHz channel. The transmitter of the MU-RTS trigger frame 815 must not request that the non-AP STAs send CTS frame responses in the 20MHz channel not occupied by the PPDU containing the MU-RTS trigger frame 815.

Fig. 9 is a transmission timing diagram 900 describing an exemplary MU-RTS trigger/CTS frame exchange for a preamble punctured PPDU in accordance with an embodiment of the present invention. Since the CTS frame response to the MU-RTS trigger frame is sent on the primary 20MHz channel, the primary 40MHz channel, the primary 80MHz channel, the 160MHz channel, or the 80+80MHz channel, the MU-RTS/CTS cannot provide full protection for all channels on which the preamble punctured PPDUs 905 and 910 are sent. Thus, to improve protection of the preamble punctured PPDUs 905 and 910, the AP may send a MU-RTS trigger frame 915 to request a simultaneous CTS frame response (e.g., CTS frame response 920) from one or more non-AP stas.

Fig. 10 is a transmission timing diagram 1000 depicting an exemplary MU-RTS trigger/CTS frame exchange for indicating disallowed sub-channels for STAs using preamble punctured PPDUs in accordance with an embodiment of the invention. The RU allocation subfield in the user information field addressed to the non-AP STA indicates whether the CTS frame response is sent on the primary 20MHz channel, the primary 40MHz channel, the primary 80MHz channel, the 160MHz channel, or the 80+80MHz channel (as described in 9.3.1.22.5 (MU-RTS variant)). If the MU-RTS trigger frame is sent with preamble puncturing in a non-HT duplicate PPDU, the MU-RTS trigger frame contains a Disallowed Subchannel Bitmap (disabled Subchannel Bitmap) in the user advisory field, with the value of the AID12 subfield set to 2047. The disallowed subchannels bitmap indicates that the 20MHz subchannels and 242 tone RUs are not allowed to be used in the CTS frame response 1015. Thus, as shown in fig. 10, the AP may indicate that the upper 20MHz channel of the secondary 40MHz channel is a non-allowed sub-channel indicated by the AP responding to the CTS responses requested by the AP on the primary 80MHz channel 1005 and the secondary 80MHz channel 1010, and the STA responds to the CTS frame 1015 on a channel excluding the non-allowed sub-channel. The CTS frame 1015 is sent in a non-HT duplicate PPDU with a punctured preamble.

EHT cooperative multi-band operation

According to an embodiment of the present invention, the method of performing wireless communication using a punctured preamble PPDU described herein may also support EHT cooperative multiband operation. For example, when one or more resource units in the EHT preamble punctured PPDU are addressed to a single STA, the EHT cooperative multiband operation may be applied to the preamble punctured PPDU.

Fig. 11 depicts an exemplary wireless communication system 1100 including a multi-band cooperative AP 105 and a multi-band cooperative STA1155 according to an embodiment of the present invention. The multi-band cooperative AP 1105 includes a 5GHz transceiver 1110 and a 2.4GHz transceiver 1115. The multi-band cooperative AP 1105 may also use other types of transceivers operating on different frequency bands, such as 6GHz and above, in accordance with embodiments of the present invention. The transceivers 1110 and 1115 of the AP 1105 exchange data and information with the cooperation management unit 1120, wherein the cooperation management unit 1120 coordinates information transmitted and/or received by the transceivers 1110 and 1115. The multi-band cooperating STA1155 includes a 5GHz transceiver 1160 and a 2.4GHz transceiver 1165. The multi-band cooperative STA1155 may also use other types of transceivers operating on different frequency bands, such as 6GHz and above, in accordance with some embodiments of the present invention. The transceivers 1160 and 1165 of the STA 155 exchange data and information with the cooperation management unit 1170, and the cooperation management unit 1170 coordinates information transmitted and received by the transceivers 1160 and 1165 using 5GHz band wireless communication and 2.4GHz band wireless communication, respectively.

The multi-band cooperative AP 1105 and the multi-band cooperative STA1155 have simultaneous transmit and receive capabilities for communicating using different wireless frequency bands. Transmitters operating on different frequency bands may perform independent Clear Channel Assessment (CCA) using joint or independent transmissions. Furthermore, full duplex communication can be enabled by independent multiband operation using FDD mode. The STA1155 may independently access channels in multiple frequency bands. For example, after receiving an Enhanced Distributed Channel Access (EDCA) transmission opportunity (TXOP) frame, the STA1155 may begin transmitting frames on the respective frequency bands during a time window provided in the EDCA TXOP frame. When the STA1155 simultaneously receives EDCA TXOP frames in multiple frequency bands, the STA1155 may simultaneously use the multiple frequency bands to transmit frames during the provided time window.

Fig. 12 is a transmission timing diagram 1200 describing an exemplary EHT cooperative multiband operation applied to a preamble punctured PPDU according to an embodiment of the present invention. Cooperative multi-band operation requires stations to have simultaneous transmit and receive capabilities on different wireless frequency bands, for example, as shown by the exemplary multi-band cooperative STA1155 in fig. 11. Two transmitters on different frequency bands perform independent Clear Channel Assessment (CCA); the transmissions may be joint or independent. Full duplex may be enabled by independent multiband operation using FDD mode. The allocation information for one or more RUs addressed to a single STA may be encoded in the EHT SIG-a fields 1220 and/or 1225 and the EHT SIG-B fields 1230 and/or 1235. As shown in fig. 12, the EHT preamble-punctured PPDU 1215 carries two PSDUs (PSDU 11240 and PSDU21245) for the STA1 in two RUs. The frequency segments (e.g., primary 80MHz channel 1205 and secondary 80MHz channel 1210) may be in the same frequency segment or different frequency segments.

Fig. 13 is a transmission timing diagram 1300 depicting an exemplary EHT cooperative multiband operation applied to a preamble-punctured PPDU, where each PSDU is addressed to a single STA, in accordance with an embodiment of the present invention. As shown in fig. 13, in the EHT preamble punctured PPDU, the PSDU 11305 and the PSDU 21310 each have a MAC Protocol Data Unit (MPDU) (e.g., an aggregated MPDU or a single MPDU). The a-MPDU 1320 transmitted on the master 80MHz channel includes MPDU1(TID1)1325, MPDU2(TID1)1330, MPDU3(TID1)1335, and padding. The S-MPDU 1345 transmitted on the secondary 80MHz channel includes MPDU4(TID1)1350 and padding. A single sequence number space (sequence number space) of MPDUs having the same TID (e.g., mpdd 11325, MPDU 21330, MPDU 31335, and MPDU 41350) is used to encode a sequence number sub-field value of an MPDU transmitted in a PSDU.

Fig. 14 is a transmission timing diagram 1400 depicting an exemplary EHT cooperative multiband operation applied to a preamble-punctured PPDU for transmitting S-MPDUs over multiple RUs and reducing padding overhead, in accordance with an embodiment of the present invention. As shown in fig. 14, dynamic fragmentation may be used to transmit S-MPDUs over multiple RUs and reduce padding overhead. As shown in fig. 14, each PSDU (e.g., PSDU1405 and PSDU 21410) addressed to a single STA in an EHT preamble punctured PPDU is allocated one dynamic fragment of a MAC Service Data Unit (MSDU) (e.g., an aggregated MSDU or MMPDU) in one MPDU. For example, in fig. 14, Fragment Number (FN) 0 of MSDU1 may be encapsulated in MPDU1-FN 01415 of PSDU 11405, and Fragment Number (FN)1 of MSDU1 may be encapsulated in MPDU1-FN 11420 of PSDU 21410.

Fig. 15 is a transmission timing diagram 1500 that depicts an exemplary EHT cooperative multiband operation applied to a preamble punctured PPDU including S-MPDUs or a-MPDUs addressed to a single STA in the EHT preamble punctured PPDU requesting an ACK frame, in accordance with an embodiment of the present invention. When a frame of an S-MPDU or a-MPDU of each PSDU addressed to a single STA in an EHT preamble punctured PPDU requests an ACK frame, an ACK response for the frame is transmitted on the same frequency band, the same RU, and/or the same frequency segment as the S-MPDU or a-MPDU. The frame may be a (dynamic) segmented frame or a management frame. As shown in fig. 15, the ACK response (ACK1)1505 for the frame MPDU1-FN 01510 is transmitted on the same frequency band, the same RU, and/or the same frequency segment as the frame MPDU1-FN 01510 is transmitted, and the ACK response (ACK2)1515 for the frame MPDU1-FN11520 is transmitted on the same frequency band, the same RU, and/or the same frequency segment as the frame MPDU1-FN11520 is transmitted.

Alternatively, according to an embodiment of the present invention, as shown in the transmission timing diagram 1600 of fig. 16, when a frame of an S-MPDU or an a-MPDU of each PSDU addressed to a single STA in an EHT preamble punctured PPDU requests an ACK frame, then an ACK response of the frame may include band or channel information indicating a band or channel to which acknowledgement information (acknowledgement information) is applied. Fig. 16 shows an example of a transmission timing diagram 1600. In this case, as shown in fig. 16, a single ACK response (ACK1)1605 may indicate successful receipt of the MPDU1-FN0 frame 1610 and the MPDU1-FN1 frame 1615. Furthermore, the same rule applies when a non-AP STA transmits more than one HE TB PPDU on multiple RUs. When one ACK frame is requested from a frame of an S-MPDU or an a-MPDU of each PSDU of an HE TB PPDU transmitted by a single STA, an ACK response for the frame is transmitted on the same frequency band, the same RU, and/or the same frequency segment on which the frame is initially transmitted. Alternatively, when one frame of an S-MPDU or an a-MPDU of each PSDU (e.g., PSDU1 or PSDU2) of the HE TBPPDU transmitted from a single STA requests an ACK frame, an ACK response for the frame may include band or channel information indicating a band or channel to which the acknowledgement information is applied.

With respect to fig. 17A, an exemplary sequence of computer-implemented steps 1700 is depicted for performing wireless communication using a preamble punctured PDDU in an 80MHz channel, in accordance with an embodiment of the present invention.

In step 1705, 20MHz channels of the 80MHz channels are punctured.

At step 1710, an indication of the punctured 20MHz channel is encoded in the fixed length SIG field.

In step 1715, the fixed length SIG field is transmitted in a preamble punctured PPDU on the primary 20MHz channel of the 80MHz channel.

With respect to fig. 17B, an exemplary sequence of computer-implemented steps 1750 for performing wireless communication using a preamble-punctured PDDU in a 160MHz channel is depicted in accordance with an embodiment of the present invention.

In step 1755, 20MHz channels of the 160MHz channels are punctured.

In step 1760, an indication of the punctured 20MHz channel is encoded in the fixed length SIG field.

In step 1765, the fixed length SIG field is transmitted in a preamble punctured PPDU on the primary and secondary channels of the 160MHz channel.

With respect to fig. 18, an exemplary sequence of computer-implemented steps 1800 for wireless communication using preamble punctured PDDUs for cooperative multi-band operation is depicted in accordance with an embodiment of the present invention.

At step 1805, the 20MHz channel of the first wireless channel is punctured.

At step 1810, an indication of the punctured 20MHz channel is encoded in the fixed length SIG field.

In step 1815, the fixed length SIG field is transmitted to the wireless STA in a PPDU of preamble puncture on the wireless channel. The preamble-punctured PPDU includes a first Resource Unit (RU) for a first wireless channel and two PPDUs for wireless STAs in a second RU for a second wireless channel. The wireless STAs are configured to transmit and receive data simultaneously on the first wireless channel and the second wireless channel.

In step 1820, the wireless STA performs cooperative multiband operation using the first wireless channel and the second wireless channel simultaneously.

Example computer-controlled System

Embodiments of the present invention relate to an electronic system for providing a punctured preamble PPDU that enables wireless devices to efficiently use the channel on which the primary service is operating (e.g., 80 or 160MHz channel). A wideband channel access mechanism for 20MHz/80MHz operating STAs is provided so that the 20MHz/80MHz operating STAs can dynamically move to a secondary channel to improve the wireless performance of the STAs. The AP coordinates the switching of the operating channels of the 20MHz/80MHz operating STAs. The following discussion describes one such exemplary electronic or computer system that may be used as a platform for implementing embodiments of the present invention.

FIG. 19 shows an example computer system. In the example of FIG. 19, the exemplary computer system 1912 includes a Central Processing Unit (CPU) or processor 1901 for running software applications and an optional operating system. The example computer system 1912 is a multi-band cooperative wireless access point AP or a multi-band cooperative wireless station STA, according to some embodiments. The random access memory 1902 and the read only memory 1903 store application programs and data for use by the CPU 1901. Data storage device 1904 provides non-volatile storage for 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 input devices 1906 and mouse controls 1907 include devices (e.g., a mouse, joystick, camera, touch screen, and/or microphone) that communicate input from one or more users to the computer system 1912.

The communications or network interface 1908 includes one or more transceivers and allows the computer system 1912 to communicate with other computer systems, networks, or devices via an electronic communications network, including wired and/or wireless communications, and including an intranet or the internet (e.g., 802.19 wireless standards). The communication or network interface 1908 may transmit a punctured preamble PPDU to enable the wireless device to efficiently use the channel (e.g., 80 or 160MHz channel) on which the primary service is operating. As shown by the multi-band cooperative AP 1105 and the multi-band cooperative STA 1170 in fig. 11, the computer system 1912 may include multiple transceivers (e.g., 2.4GHz transceivers, 5GHz transceivers, and/or 6GHz transceivers) for performing multi-band cooperative operation using the multiple transceivers simultaneously.

Optional display device 1910 may be any device capable of displaying visual information in response to a signal from computer system 1912, and may include, for example, a flat-panel touch-sensitive display, and may be remotely located. The components of computer system 1912, including CPU1901, ROM/RAM1902/1903, data storage device 1904, user input device 1906, and graphics subsystem 1905, may be coupled via one or more data buses.

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.

The subject matter described herein sometimes illustrates different components contained within, or connected with, different other components. It should be understood that: such depicted architectures are merely exemplary, and, in fact, many other architectures can be implemented which achieve the same functionality. In a conceptual sense, any arrangement of components to achieve the same functionality is effectively "associated" such that the desired functionality is achieved. Hence, any two components herein combined to achieve a particular functionality can be seen as "associated with" each other such that the desired functionality is achieved, irrespective of architectures or intermedial components. Similarly, any two components so associated can also be viewed as being "operably connected," or "operably coupled," to each other to achieve the desired functionality, and any two components capable of being so associated can also be viewed as being "operably couplable," to each other to achieve the desired functionality. Specific examples of "operatively couplable" include, but are not limited to: physically couplable and/or physically interacting, interacting components, and/or wirelessly interactable and/or wirelessly interacting components, and/or logically interacting and/or logically interactable components.

Furthermore, with respect to the use of substantially any plural and/or singular terms herein, those having skill in the art can translate from the plural to the singular and/or from the singular to the plural as is appropriate to the context and/or application.

It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as "open" terms (e.g., the term "including" should be interpreted as "including but not limited to," the term "having" should be interpreted as "having at least," the term "includes" should be interpreted as "includes but is not limited to," etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases "at least one" and "one or more" to introduce claim recitations. However, the use of such phrases should not be construed to: introduction of a claim recitation object by the indefinite article "a" or "an" limits any claim containing such introduced claim recitation object to inventions containing only one such recitation object, even when the same claim contains the introductory phrases "one or more" or "at least one" and indefinite articles such as "a" or "an" (e.g., "a" and/or "an" should typically be interpreted to mean "at least one" or "one or more"); the foregoing also applies to the introduction of claim recitations by definite articles. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that: such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of "two recitations," without other modifiers, typically means at least two recitations, or two or more recitations). Further, where a convention analogous to "at least one of A, B and C, etc." is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., "a system having at least one of A, B and C" would include but not be limited to systems having A alone, B alone, C, A and B alone, A and C together, B and C together, and/or A, B and C together, etc.). Where a convention analogous to "A, B or at least one of C, etc." is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., "a system having at least one of A, B or C" would include but not be limited to systems having A alone, B alone, C, A and B alone, A and C together, B and C together, and/or A, B and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase "a or B" should be understood to encompass the possibilities of "a", "B", or "a and B".

Although some example techniques have been described and illustrated herein using different methods, apparatus, and systems, those skilled in the art will understand that: various other modifications may be made, and equivalents may be substituted, without departing from claimed subject matter. In addition, many modifications may be made to adapt a particular situation to the teachings of the claimed subject matter without departing from the central concept described herein. Therefore, it is intended that claimed subject matter not be limited to the particular examples disclosed, but that such claimed subject matter may also include all implementations falling within the scope of the appended claims, and equivalents thereof.