CN117641261A - Coordinated spatial multiplexing (CO-SR) transmission method and device thereof - Google Patents

Coordinated spatial multiplexing (CO-SR) transmission method and device thereof Download PDF

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Publication number
CN117641261A
CN117641261A CN202311082584.7A CN202311082584A CN117641261A CN 117641261 A CN117641261 A CN 117641261A CN 202311082584 A CN202311082584 A CN 202311082584A CN 117641261 A CN117641261 A CN 117641261A
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sta
frame
shared
length
transceiver
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李宗融
方博隽
林瑞国
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MediaTek Inc
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MediaTek Inc
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Priority claimed from US18/455,010 external-priority patent/US20240073953A1/en
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Abstract

The embodiment of the invention provides a coordinated spatial multiplexing (CO-SR) transmission method and a device thereof, wherein the method comprises the following steps: the transceiver of the shared Access Point (AP) sends an announcement frame to the AP needing sharing; the transceiver receiving a first Block Acknowledgement (BA) frame from a first Station (STA) associated with the shared AP; and in response to the first STA being a first legacy STA, the transceiver transmitting a pseudo Clear To Send (CTS) frame before transmitting a next announcement frame.

Description

Coordinated spatial multiplexing (CO-SR) transmission method and device thereof
Technical Field
The present invention relates generally to coordinated-spatial-reuse (CO-SR) technology, and more particularly, to a CO-SR transmission method and apparatus.
Background
IEEE 802.11 is a set of Media Access Control (MAC) and physical layer (PHY) specifications for implementing wireless local area network (wireless local area network, WLAN) communications in Wi-Fi (2.4, 3.6, 5, and 60 GHz) bands. The 802.11 family consists of a family of half-duplex air-interface (over-the-air) modulation techniques using the same basic protocol. These standards and amendments provide a basis for wireless network products using Wi-Fi frequency bands. For example, IEEE 802.11ac is a wireless networking standard in the IEEE 802.11 family that can provide high-throughput WLAN over the 5GHz band. The IEEE 802.11ac standard proposes wider channel bandwidths (20 MHz, 40MHz, 80MHz and 160 MHz). The high efficiency WLAN research group (High Efficiency WLAN study group, HEW SG) is a research group within the IEEE 802.11 working group that will consider improving spectral efficiency to enhance system throughput in high density scenarios of wireless devices. Since HEW SG, TGax (IEEE task group) is established and responsible for formulating the IEEE 802.11ax standard, which will be the subsequent standard for IEEE 802.11 ac. Recently, WLANs have grown exponentially in the organization of many industries (industries).
Coordinated spatial multiplexing (CO-SR) is a potential Wi-Fi8 spatial multiplexing (SR) scheme application under multi-AP (multi-AP) operation. CO-SR transmission may combine power control and link adaptation between multiple APs to minimize the negative impact of spatial multiplexing and maximize the overall throughput between the multiple APs.
In a conventional CO-SR transmission, when a Station (STA) in the CO-SR transmission is a conventional STA, a BA frame from an STA associated with an AP that needs to be shared may overlap in time with a next announcement (advertisement) frame from the shared AP. Thus, the AP that needs to be shared may not be able to successfully receive the next announcement frame from the shared AP to maintain the CO-SR transmission.
Thus, how to avoid interference between announcement frames from a shared AP and BA frames from STAs associated with the AP that need to be shared is a discussion worthy topic.
Disclosure of Invention
A coordinated spatial multiplexing (CO-SR) transmission method and apparatus for CO-SR transmission are provided to overcome the above problems.
The embodiment of the invention provides a CO-SR transmission method. In the CO-SR transmission method, a transceiver of a shared Access Point (AP) may transmit an announcement frame to an AP to be shared, and the transceiver may receive a first Block Acknowledgement (BA) frame from a first Station (STA) associated with the shared AP. The transceiver may send a dummy-to-send (CTS) frame before sending the next announcement frame in response to the first STA being the first legacy STA.
The embodiment of the invention provides a CO-SR transmission method. In the CO-SR transmission method, a transceiver of an Access Point (AP) requiring sharing receives an announcement frame from the shared AP, and a processor of the AP requiring sharing shortens a length of a data frame in response to a Station (STA) associated with the AP requiring sharing being a legacy STA. The transceiver transmits a data frame to the STA and the transceiver receives a Block Acknowledgement (BA) frame from the STA.
The embodiment of the invention provides a device for CO-SR transmission. The apparatus may include a transceiver and a processor. The transceiver may communicate wirelessly with a shared Access Point (AP). The processor may be coupled to the transceiver. The transceiver receives an announcement frame from the shared AP. The processor shortens the length of the data frame in response to the STA associated with the AP that needs to be shared being a legacy STA, and the transceiver transmits the data frame to the STA. The transceiver receives the BA from the STA.
Other aspects and features of the present invention will become apparent to those ordinarily skilled in the art upon review of the following description of specific embodiments of a CO-SR transmission method and apparatus for CO-SR transmission.
Drawings
The invention will be more fully understood by reference to the accompanying drawings, in which:
fig. 1 is a block diagram of a wireless communication network 100 according to an embodiment of the invention.
Fig. 2 is a block diagram of an access point 200 according to an embodiment of the invention.
Fig. 3 is a schematic diagram illustrating CO-SR transmission for a legacy STA according to an embodiment of the present invention.
Fig. 4 is a schematic diagram illustrating CO-SR transmission for a legacy STA according to another embodiment of the present invention.
Fig. 5 is a schematic diagram illustrating CO-SR transmission for a legacy STA according to another embodiment of the present invention.
Fig. 6 is a schematic diagram illustrating CO-SR transmission for a non-legacy STA according to an embodiment of the present invention.
Fig. 7 is a schematic diagram illustrating CO-SR transmission for a non-legacy STA according to another embodiment of the present invention.
Fig. 8 is a flowchart illustrating a CO-SR transmission method according to an embodiment of the present invention.
Fig. 9 is a flowchart illustrating a CO-SR transmission method according to another embodiment of the present invention.
Detailed Description
The following description is of the best contemplated mode of carrying out the invention. This description is made for the purpose of illustrating the general principles of the invention and should not be taken in a limiting sense. The scope of the invention should be determined with reference to the appended claims.
Fig. 1 is a block diagram of a wireless communication network 100 according to an embodiment of the invention. As shown in fig. 1, the wireless network 100 may include a first basic service set (basic service set, BSS) 110 and a second BBS120. The first BSS may include an Access Point (AP) AP1, a Station (STA) STA 11 And station STA 12 . The second BSS may include an access point AP 2 Station STA 21 And station STA 22 . It is to be noted that in order to clarify the idea of the present invention, fig. 1 shows a simplified block diagram, in which only components relevant to the present invention are shown. However, the present invention should not be limited to what is shown in fig. 1.
In an embodiment, an access point AP l And AP (Access Point) 2 May include wireless routers, access points, notebook computers, desktop computers, smart phones, tablet computers, and the like. In some embodiments, the access point AP l May be considered a controller device connected to a WAN (wide area network ) port of a modem device (not shown in fig. 1) through a backhaul link. In addition, it should be noted that, in order to illustrate the embodiment of the present invention, the access point AP may be 1 Considered as shared AP (sharing AP), access point AP 2 Viewed as in CO-spatial reuse (CO-SR) transmissionA shared AP (shared AP) is required.
In an embodiment, a station STA 11 Station STA 12 Station STA 21 And station STA 22 May be a UE, such as a portable or mobile device, a wearable device, a wireless communication device, or a computing device. For example, the STA may be implemented in a smart phone, a smart watch, a personal digital assistant, a digital camera, or a computing device such as a tablet computer, a laptop computer, or a notebook computer. In addition, in an embodiment, the station STA 11 Station STA 12 Station STA 21 And station STA 22 May be a legacy STA. The legacy STA may be a high-throughput (HT) STA or a very high-throughput (VHT) STA. In addition, in the embodiment of the present invention, the non-legacy STA may be a STA in Wi-Fi 6, wi-Fi 7 or other newer Wi-Fi standards, for example, the non-legacy STA may be a high-efficiency (HE) STA or an extremely high-throughput (EHT) STA.
Fig. 2 is a block diagram of an access point 200 according to an embodiment of the invention. The access point 200 may be applied to the access point AP1 and the access point AP2. As shown in fig. 2, access point 200 may include an integrated circuit 210, a processing circuit 220, a memory 230, and at least one antenna 240. The antenna 240 may transmit and receive Radio Frequency (RF) signals. It is to be noted that in order to clarify the idea of the present invention, fig. 2 shows a simplified block diagram, in which only components relevant to the present invention are shown. However, the present invention should not be limited to what is shown in fig. 2.
Integrated circuit 210 is coupled to antenna 240 and integrated circuit 210 may include one or more transceivers 250 that may receive RF signals from antenna 240, convert them to baseband signals, and transmit the baseband signals to processing circuit 220. The transceiver 250 may also receive baseband signals from the processing circuit 220, convert them to RF signals, and transmit the RF signals to the antenna 240. Transceiver 250 may include a number of hardware elements to perform radio frequency conversion. For example, transceiver 250 may include a power amplifier, a mixer, an analog-to-digital converter (ADC), and a digital-to-analog converter (DAC), although the invention should not be limited thereto.
In some embodiments, integrated circuit 210 may be a Wi-Fi chip, and integrated circuit 210 and processing circuit 220 may be implemented by a system-on-chip (SoC), although the invention is not limited in this respect.
In some embodiments, the processing circuit 220 may be implemented by a central processing unit (central processing unit, CPU), general-purpose processor (general-purpose processor), digital signal processor (digital signal processor, DSP), or microcontroller, but the invention is not limited thereto. In an embodiment of the invention, processing circuit 220 may control the operation of integrated circuit 210 and memory 230. The processing circuit 220 may also be arranged to execute program code of software modules according to an embodiment of the invention. Program code that accompanies particular data in a data structure may also be referred to as a processor logic unit or stack instance (stack instance) when executed. Thus, the processing circuit 220 may be considered to be comprised of a plurality of processor logic units, each for performing one or more specific functions or tasks of a respective software module.
Memory 230 may be volatile memory or nonvolatile memory. For example, the volatile memory may be a static random access memory (static random access memory, SRAM) or a dynamic random access memory (dynamic random access memory, DRAM), and the nonvolatile memory may be a flash memory, a read-only memory (ROM), an erasable programmable read-only memory (erasable programmable read-only memory, EPROM), or an electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), but the present invention is not limited thereto. Additionally, memory 230 may store instructions or firmware that may be executed by processing circuitry 220 to control the operation of access point 200.
Fig. 3 is a schematic diagram illustrating CO-SR transmission for a legacy STA according to an embodiment of the present invention. As shown in fig. 3, a sharing AP (i.e., access point AP 1) may send an announcement frame (e.g., CO-SR announcement frame) to an AP that needs to be shared (i.e., access point AP 2).
In an embodiment of the present invention, the announcement frame may include information of Tx power control of the AP requiring sharing, CO-SR duration, medium access control (medium access control, MAC) address of the AP requiring sharing, and the like. In addition, the announcement frame may also include a block acknowledgement (block acknowledgement, BA) type field of the shared AP and a BA length of the shared AP. The BA types of the shared AP may include legacy BAs, trigger-based BAs, and multi-user BA request (MU-BAR) based BAs. The BA type field of the shared AP may indicate the BA type of the shared AP in the CO-SR transmission. For example, in fig. 3-5, the BA type of the shared AP may be a legacy BA, i.e., the STAs in the CO-SR transmission are legacy STAs (e.g., HT STAs or VHT STAs). In another example, in fig. 6, the BA type of the shared AP may be based on the triggered BA. In another example, in fig. 7, the BA type of the shared AP may be MU-BAR based BA. The BA length field of the shared AP may indicate the BA length in the CO-SR transmission.
After receiving the announcement frame, the AP to be shared and the shared AP can respectively perform downlink data transmission. The shared AP may transmit to STAs associated with the shared AP (with the station STA in fig. 3 11 For example), and the AP requiring sharing may transmit a second data frame to the STA associated with the AP requiring sharing (with the station STA in fig. 3) 21 For example). As shown in fig. 3, in this embodiment, the transmission of the first data frame and the transmission of the second data frame may end at the same time, that is, the tail of the second data frame is aligned with the tail of the first data frame. In this embodiment, the first data frame and the second data frame may be aggregate MAC protocol data units (aggregated MAC protocol data unit, a-MPDUs).
Station STA associated with shared AP after transmitting the first data frame and the second data frame 11 The first BA frame BA1 may be transmitted to the shared AP and the station STA associated with the AP to be shared 21 The second BA frame BA2 may be sent to the AP that needs to be shared. Station STA 11 And station STA 21 May be different. As a result, when the station STA 11 And station STA 21 Is a legacy station (e.g., HT STA or VHT STA) and the BA duration of the second BA frame BA2 is too long, from the station STA 21 May overlap in time with the next announcement frame from the sharing AP. Thus, in this embodiment, the sharing AP may transmit a clear-to-send (CTS) frame before transmitting the next announcement frame to avoid interference between the second BA frame BA2 and the next announcement frame. The sharing AP may transmit the pseudo CTS frame after a frame interval (e.g., short inter-frame space (SIFS)) between the first BA frame BA1 and the pseudo CTS frame. The total length of the first BA frame BA1, the length of the frame interval, and the length of the pseudo CTS frame may be longer than the length of the second BA frame BA2. For example, if the length of the first BA frame BA1 is 32 μs, the length of the second BA frame BA2 is 68 μs, and the length of the frame interval is 16 μs, the length of the pseudo CTS frame may be set to 28 μs (i.e., 32+16+28>68)。
Fig. 4 is a schematic diagram illustrating CO-SR transmission for a legacy STA according to another embodiment of the present invention. As shown in fig. 4, the sharing AP (i.e., access point AP 1) may send an announcement frame (e.g., CO-SR announcement frame) to the AP that needs to be shared (i.e., access point AP 2).
After receiving the announcement frame, the AP to be shared and the shared AP can respectively perform downlink data transmission. The shared AP may transmit to STAs associated with the shared AP (stations STA in fig. 4 11 For example), and the AP requiring sharing may transmit a second data frame to the STA associated with the AP requiring sharing (in fig. 4, STA at station 21 For example). In this embodiment, the first data frame and the second data frame may be an A-MPDU. As shown in fig. 4, in this embodiment, the AP that needs to be shared may shorten the length of the second data frame (i.e., the transmission duration (transmission duration)) by a default length. For example, as shown in fig. 4, the AP that needs to share may shorten the length of the second data frame by 32 μs (i.e., the default length). However, in the present embodiment, the AP to be shared may shorten the length of the second data frame to avoid from the station STA associated with the AP to be shared 21 And the second BA frame BA2 of (c) overlaps in time with the next announcement frame from the sharing AP.
At the time of transmitting the first data frame and the second numberStation STA associated with shared AP after framing 11 The first BA frame BA1 may be transmitted to the shared AP and the station STA associated with the AP to be shared 21 The second BA frame BA2 may be sent to the AP that needs to be shared. In this embodiment, even if the BA duration of the second BA frame BA2 (e.g., 68 μs) is longer than the BA duration of the first BA frame BA1 (e.g., 32 μs), the second BA frame BA2 will not overlap in time with the next announcement frame from the shared AP.
Fig. 5 is a schematic diagram illustrating CO-SR transmission for a legacy STA according to another embodiment of the present invention. As shown in fig. 5, the sharing AP (i.e., access point AP 1) may send an announcement frame (e.g., CO-SR announcement frame) to the AP that needs to be shared (i.e., access point AP 2).
After receiving the announcement frame, the AP to be shared and the shared AP can respectively perform downlink data transmission. The shared AP may transmit to STAs associated with the shared AP (STAs in station in fig. 5 11 For example), and the AP requiring sharing may transmit a second data frame to the STA associated with the AP requiring sharing (in fig. 5, STA at station 21 For example). In this embodiment, the first data frame and the second data frame may be an A-MPDU. As shown in fig. 5, in this embodiment, the AP to be shared may shorten or adjust the length of the second data frame, so that the tail of the second BA frame BA2 is aligned with the tail of the first data frame. Specifically, the AP requiring sharing may estimate the length of the second BA frame BA2 based on the lookup table. The lookup table may record the station STA 21 For example, the lookup table may record the relationship between the transmission rate of 24Mbps for a length of 32 μs, 12Mbps for a length of 44 μs, and 6Mbps for a length of 68 μs, and the length of the second BA frame BA2. Since the transmission rate of the STA associated with the AP to be shared is generally the same as the transmission rate of the AP to be shared, the AP to be shared may estimate the length of the second BA frame BA2 based on its transmission rate (i.e., the transmission rate of the AP to be shared) and the lookup table. When the AP to be shared estimates the length of the second BA frame BA2, the length of the second data frame may be shortened or adjusted according to the estimated length of the second BA frame BA2, so that the tail of the second BA frame BA2 is equal to the first numberAligned by the tail of the frame. For example, as shown in fig. 5, the AP requiring sharing may shorten the length of the second data frame based on the estimated length (32 μs) of the second BA frame BA2. It should be noted that in fig. 5, the estimated length of the second BA frame BA2 is 32 μs, but the present invention is not limited thereto.
Station STA associated with shared AP after transmitting the first data frame and the second data frame 11 The first BA frame BA1 may be transmitted to the shared AP and the station STA associated with the AP to be shared 21 The second BA frame BA2 may be sent to the AP that needs to be shared. In this embodiment, since the tail of the second BA frame BA2 is aligned with the tail of the first data frame, the second BA frame BA2 does not temporally overlap with the next announcement frame from the shared AP.
Fig. 6 is a schematic diagram illustrating CO-SR transmission for a non-legacy STA (e.g., HE STA or EHT STA) according to an embodiment of the present invention. As shown in fig. 6, a sharing AP (i.e., access point AP 1) may send an announcement frame (e.g., CO-SR announcement frame) to an AP that needs to be shared (i.e., access point AP 2). The announcement frame may include a trigger-based (TB) BA length.
After receiving the announcement frame, the AP to be shared and the shared AP can respectively perform downlink data transmission. The shared AP may transmit to STAs associated with the shared AP (stations STA in fig. 6 11 For example), and the AP requiring sharing may transmit a second data frame to the STA associated with the AP requiring sharing (in fig. 6, STA by station STA) 21 For example). In this embodiment, the a-MPDU transmitted by the shared AP includes a trigger frame and a first data frame located after the trigger frame, and the a-MPDU transmitted by the AP to be shared includes the trigger frame and a second data frame located after the trigger frame. As shown in fig. 6, the trigger frame may indicate the transmission rate and length of the first BA frame BA1 and the second BA frame BA2. That is, in this embodiment, the BA type of the shared AP is a trigger-based BA, and the first BA frame BA1 and the second BA frame BA2 are trigger-based (TB) BAs triggered by the trigger frame.
Station STA associated with shared AP after transmitting the first data frame and the second data frame 11 The first BA frame BA1 may be sent to the sharing AP and shared with the need for sharingStation STA associated with AP 21 The second BA frame BA2 may be sent to the AP that needs to be shared.
Fig. 7 is a schematic diagram illustrating CO-SR transmission for a non-legacy STA (e.g., a HE STA or an EHT STA) according to another embodiment of the present invention. As shown in fig. 7, the sharing AP (i.e., access point AP 1) may send an announcement frame (e.g., CO-SR announcement frame) to the AP that needs to be shared (i.e., access point AP 2). The announcement frame may include a trigger-based (TB) BA length.
After receiving the announcement frame, the AP to be shared and the shared AP may each perform downlink data transmission. The shared AP may transmit to STAs associated with the shared AP (stations STA in fig. 7 11 For example), and the AP requiring sharing may transmit a second data frame to the STA associated with the AP requiring sharing (in fig. 7, STA at station 21 For example). In this embodiment, the first data frame and the second data frame may be an A-MPDU.
As shown in fig. 7, in the present embodiment, the AP is shared to the station STA 11 AP to station STA that transmits first data frame and needs sharing 21 After sending the second data frame, the shared AP may send the second data frame to the station STA 11 Sending multi-user BA request (MU-BAR) frame, the AP needing sharing can also send to station STA 21 And transmitting the MU-BAR frame. The MU-BAR frame may indicate a transmission rate and a length of the first BA frame BA1 and the second BA frame BA2. I.e., in the present embodiment, the BA type of the shared AP is MU-BAR based BA, the first BA frame BA1 and the second BA frame BA2 are trigger-based (TB) basted by MU-BAR frames.
Station STA associated with shared AP after transmitting the first data frame and the second data frame 11 The first BA frame BA1 may be transmitted to the shared AP and the station STA associated with the AP to be shared 21 The second BA frame BA2 may be sent to the AP that needs to be shared.
Fig. 8 is a flowchart illustrating a CO-SR transmission method according to an embodiment of the present invention. The CO-SR transmission method may be applied to the wireless communication network 100 and the AP 200. In addition, the CO-SR transmission method is applied to the shared AP in the CO-SR transmission. As shown in fig. 8, in step S810, the sharing AP may transmit an announcement frame to the APs that need to be shared.
In step S820, the sharing AP may receive a first BA frame from a first STA associated with the sharing AP.
In step S830, in response to the first STA being the first legacy STA, the sharing AP may transmit a pseudo Clear To Send (CTS) frame before transmitting the next announcement frame.
In the CO-SR transmission method, the sharing AP may further transmit the pseudo CTS frame after a frame interval between the first BA frame and the pseudo CTS frame. The total length of the first BA frame, the second length of the frame interval, and the third length of the pseudo CTS frame is longer than the fourth length of the second BA frame. The second BA frame is transmitted by a second STA associated with the AP to be shared to the AP to be shared, and the second STA is a second legacy STA. The first legacy STA and the second legacy STA are HT STAs or VHT STAs.
In the CO-SR transmission method, the sharing AP may further transmit a trigger frame and a data frame to the first STA in response to the first STA being the HE STA or the EHT STA, wherein the data frame is located after the trigger frame, the trigger frame and the data frame are located in the a-MPDU, and receive a trigger-based BA from the first STA.
In the CO-SR transmission method, the sharing AP may further transmit a multi-user BA request (MU-BAR) frame to the first STA in response to the first STA being the HE STA or the EHT STA, and receive a trigger-based BA from the first STA.
In the CO-SR transmission method, the announcement frame may include a BA type field of the shared AP and a BA length field of the shared AP.
Fig. 9 is a flowchart illustrating a CO-SR transmission method according to another embodiment of the present invention. The CO-SR transmission method may be applied to the wireless communication network 100 and the AP 200. In addition, the CO-SR transmission method is applied to the AP which needs to be shared in the CO-SR transmission. As shown in fig. 9, in step S910, an AP that needs to be shared may receive an announcement frame from the shared AP.
In step S920, the AP requiring sharing may shorten the length of the data frame in response to the STA associated with the AP requiring sharing being a legacy STA.
In step S930, the AP requiring sharing may transmit a shortened data frame to the STA.
In step S940, the AP requiring sharing may receive a BA frame from the STA.
In the CO-SR transmission method, the AP that needs to be shared may also shorten the length of the data frame by a default length (e.g., 32 μs).
In the CO-SR transmission method, the AP to be shared may also estimate the length of the BA frame based on the lookup table and shorten the length of the data frame based on the length of the BA frame. In this embodiment, the tail of the BA frame is aligned with the tail of the data frame sent by the sharing AP.
In the CO-SR transmission method, the legacy STA may be an HT STA or a VHT STA.
In the CO-SR transmission method, the AP to be shared may further transmit a trigger frame and a data frame to the STA in response to the STA being the HE STA or the EHT STA, wherein the data frame is located after the trigger frame, the trigger frame and the data frame are located in the a-MPDU, and receive a trigger-based BA from the STA.
In the CO-SR transmission method, the AP requiring sharing may also transmit a MU-BAR frame to the STA in response to the STA being an HE STA or an EHT STA, and receive a trigger-based BA from the STA.
In the CO-SR transmission method provided by the present invention, when the STA is a legacy STA, it is avoided that a BA frame from the STA associated with an AP to be shared overlaps in time or space with a next announcement frame from the shared AP.
Ordinal terms such as "first," "second," "third," and the like in the description and in the claims are used for descriptive purposes. It does not itself imply any order or relationship.
The steps of a method described in connection with the aspects disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. Software modules (e.g., including executable instructions and associated data) and other data may reside in a data memory such as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of computer-readable storage medium known in the art. The sample storage medium may be coupled to a machine, such as a computer/processor (which may be referred to herein for convenience as a "processor"), such that the processor can read information (e.g., code) from, and write information to, the storage medium. The sample storage medium may be integrated into the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a UE. In the alternative, the processor and the storage medium may reside as discrete components in a UE. Furthermore, in some aspects, any suitable computer program product may comprise a computer-readable medium comprising code associated with one or more aspects of the present invention. In some aspects, the computer software product may include packaging material.
It should be noted that although not explicitly specified, one or more steps of the methods described herein may include steps for storing, displaying, and/or outputting as desired for a particular application. In other words, any data, records, fields, and/or intermediate results discussed in the method may be stored, displayed, and/or output to another device as desired for a particular application. While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The various embodiments presented herein, or portions thereof, may be combined to create further embodiments. The above description is of the best mode contemplated for carrying out the invention. This description is made for the purpose of illustrating the general principles of the invention and should not be taken in a limiting sense. The scope of the invention is best determined by reference to the appended claims.
The above paragraphs describe some aspects. It should be apparent that the teachings of the present invention can be implemented in a variety of ways and that any particular configuration or function in the disclosed embodiments is merely representative. Those skilled in the art will appreciate that all aspects disclosed in the present invention may be applied independently or in combination.
While the invention has been described by way of example and in terms of preferred embodiments, it is to be understood that the invention is not so limited. Various modifications and alterations may be made by those skilled in the art without departing from the scope and spirit of the invention. Accordingly, the scope of the invention should be defined and protected by the following claims and their equivalents.

Claims (20)

1. A coordinated spatial multiplexing (CO-SR) transmission method, comprising:
the transceiver of the shared Access Point (AP) sends an announcement frame to the AP needing sharing;
the transceiver receiving a first Block Acknowledgement (BA) frame from a first Station (STA) associated with the shared AP; and
in response to the first STA being a first legacy STA, the transceiver transmits a pseudo Clear To Send (CTS) frame before transmitting a next announcement frame.
2. The CO-SR transmission method according to claim 1, further comprising:
the transceiver transmits the pseudo CTS frame after a frame interval between the first BA frame and the pseudo CTS frame,
wherein the total length of the first BA frame, the second length of the frame interval and the third length of the pseudo CTS frame is longer than the fourth length of the second BA frame,
wherein the second BA frame is transmitted to the AP to be shared by a second STA associated with the AP to be shared, and the second STA is a second legacy STA.
3. The CO-SR transmission method according to claim 2, wherein the first legacy STA and/or the second legacy STA is a High Throughput (HT) STA or a Very High Throughput (VHT) STA.
4. The CO-SR transmission method according to claim 1, further comprising:
in response to the first STA being a High Efficiency (HE) STA or an Extremely High Throughput (EHT) STA, the transceiver transmits a trigger frame and a data frame to the first STA, wherein the data frame is located after the trigger frame; and
the transceiver receives a trigger-based BA from the first STA.
5. The CO-SR transmission method according to claim 1, further comprising:
in response to the first STA being an HE STA or an EHT STA, the transceiver transmits a multi-user BA request (MU-BAR) frame to the first STA; and
the transceiver receives a trigger-based BA from the first STA.
6. The CO-SR transmission method according to claim 1, wherein the announcement frame includes a BA type field of the shared AP and a BA length field of the shared AP.
7. A coordinated spatial multiplexing (CO-SR) transmission method, comprising:
a transceiver of an Access Point (AP) requiring sharing receives an announcement frame from the sharing AP;
responsive to a Station (STA) associated with the AP to be shared being a legacy STA, the processor of the AP to be shared shortens a length of a data frame; and
the transceiver transmitting the shortened data frame to the STA;
the transceiver receives a Block Acknowledgement (BA) frame from the STA.
8. The CO-SR transmission method according to claim 7, further comprising:
the processor shortens the length of the data frame by a default length.
9. The CO-SR transmission method according to claim 7, further comprising:
the processor estimates a length of the BA frame based on a lookup table; and
the processor shortens the length of the data frame based on the length of the BA frame.
10. The CO-SR transmission method of claim 9 wherein a first tail of the BA frame is aligned with a second tail of a data frame transmitted by the shared AP.
11. The CO-SR transmission method according to claim 7, wherein the legacy STA is a High Throughput (HT) STA or a Very High Throughput (VHT) STA.
12. The CO-SR transmission method according to claim 7, further comprising:
in response to the STA being a High Efficiency (HE) STA or an Extremely High Throughput (EHT) STA, the transceiver transmits a trigger frame and a data frame to the STA; wherein the data frame is located after the trigger frame; and
the transceiver receives a trigger-based BA from the STA.
13. The CO-SR transmission method according to claim 7, further comprising:
in response to the STA being an HE STA or an EHT STA, the transceiver transmits a multi-user BA request (MU-BAR) frame to the STA; and
the transceiver receives a trigger-based BA from the STA.
14. An apparatus for coordinating spatial multiplexing (CO-SR) transmissions, comprising:
a transceiver for wireless communication with a shared Access Point (AP); and
a processor coupled to the transceiver,
wherein the transceiver receives an announcement frame from the shared AP, the processor shortens a length of a data frame in response to a Station (STA) associated with the apparatus being a legacy STA, the transceiver transmits the shortened data frame to the STA, and the transceiver receives a Block Acknowledgement (BA) frame from the STA.
15. The apparatus of claim 14, wherein the processor shortens the length of the data frame by a default length.
16. The apparatus of claim 14, wherein the processor estimates the length of the BA frame based on a lookup table and shortens the length of the data frame based on the length of the BA frame.
17. The apparatus of claim 16, wherein a first tail of the BA frame is aligned with a second tail of a data frame transmitted by the shared AP.
18. The apparatus of claim 14, wherein the legacy STA is a High Throughput (HT) STA or a Very High Throughput (VHT) STA.
19. The apparatus of claim 14, wherein the transceiver transmits a trigger frame and a data frame to the STA in response to the STA being a High Efficiency (HE) STA or an Extremely High Throughput (EHT) STA, wherein the data frame is located after the trigger frame and receives a trigger-based BA from the STA.
20. The apparatus of claim 14, wherein the transceiver, in response to the STA being an HE STA or an EHT STA, transmits a multi-user BA request (MU-BAR) frame to the STA and receives a trigger-based BA from the STA.
CN202311082584.7A 2022-08-26 2023-08-25 Coordinated spatial multiplexing (CO-SR) transmission method and device thereof Pending CN117641261A (en)

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US63/373,560 2022-08-26
US18/455,010 2023-08-24
US18/455,010 US20240073953A1 (en) 2022-08-26 2023-08-24 Coordinated-spatial reuse (co-sr) transmission method and apparatus thereof

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