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EP-4740319-A1 - SOUNDING INTERVAL OPTIMIZATION

EP4740319A1EP 4740319 A1EP4740319 A1EP 4740319A1EP-4740319-A1

Abstract

Optimizing or otherwise improving sounding intervals may be provided. Improving sounding intervals can include generating predicted Channel State information (CSI) of a Station (STA). A Null Data Packet (NDP) Announcement (NDPA) can be sent to the STA, wherein the NDPA instructs the STA to send compressed CSI. A reference signal is then sent to the STA. Finally, the compressed CSI is received from the STA.

Inventors

  • HENRY, JEROME
  • THUBERT, PASCAL
  • VASSEUR, JEAN PHILIPPE
  • LOVISON, FEDERICO
  • DASGUPTA, SUKRIT

Assignees

  • Cisco Technology, Inc.

Dates

Publication Date
20260513
Application Date
20240709

Claims (20)

  1. 1. A method comprising: generating predicted Channel State information (CSI) of a Station (STA); sending a Null Data Packet (NDP) Announcement (NDPA) to the STA, wherein the NDPA instructs the STA to send compressed CSI; sending a reference signal to the STA; and receiving the compressed CSI from the STA.
  2. 2. The method of claim 1 , wherein: the predicted CSI comprises a predicted feedback matrix; and the compressed CSI comprises a compressed feedback matrix.
  3. 3. The method of claim 1 or claim 2, further comprising: determining to send additional NDPAs to the STA every other subsequent sounding interval and skip sending additional NDPAs to the STA for remaining sounding intervals.
  4. 4. The method of any preceding claim, wherein generating predicted CSI of STA comprises any one of: (i) determining a channel state trend using an amount of previous CSI from the STA and trajectory determination techniques, and predicting the predicted CSI based on the channel state trend; (ii) predicting the predicted CSI based on changes in information associated with other STAs in a cell; or (iii) a combination of (i) and (ii).
  5. 5. The method of any preceding claim, further comprising: comparing the predicted CSI and the compressed CSI to evaluate the predicted CSI; and generating a new NDPA based on the evaluation of the predicted CSI.
  6. 6. The method of any preceding claim, further comprising: comparing the predicted CSI and the compressed CSI to evaluate the predicted CSI; and sending the evaluation of the predicted CSI to the STA.
  7. 7. The method of any preceding claim, further comprising: determining the predicted CSI differs from the compressed CSI; and sending a new NDPA to the STA, wherein the new NDPA comprises any one of (i) a request for additional samples, or (ii) a request for a new compressed CSI.
  8. 8. The method of any preceding claim, further comprising: comparing the predicted CSI and the compressed CSI to evaluate the predicted CSI; and based on the evaluation of the predicted CSI: determining a number of sounding intervals to skip sending additional NDPAs to the STA, and evaluating a compression and loss level of the compressed CSI.
  9. 9. A system comprising: a memory storage; and a processing unit coupled to the memory storage, wherein the processing unit is operative to: generate predicted Channel State information (CSI) of a Station (STA); send a Null Data Packet (NDP) Announcement (NDPA) to the STA, wherein the NDPA instructs the STA to send compressed CSI; send a reference signal to the STA; and receive the compressed CSI from the STA.
  10. 10. The system of claim 9, wherein: the predicted CSI comprises a predicted feedback matrix; and the compressed CSI comprises a compressed feedback matrix.
  11. 11 . The system of claim 9 or claim 10, the processing unit being further operative to: determine to send additional NDPAs to the STA every other subsequent sounding interval and skip sending additional NDPAs to the STA for remaining sounding intervals.
  12. 12. The system of any of claims 9 to 1 1 , wherein to generate predicted CSI of STA comprises any one of: (i) to determine a channel state trend using an amount of previous CSI from the STA and trajectory determination techniques, and predicting the CSI based on the channel state trend; (ii) to predict the predicted CSI based on changes in information associated with other STAs in a cell; or (iii) a combination of (i) and (ii).
  13. 13. The system of any of claims 9 to 12, the processing unit being further operative to: compare the predicted CSI and the compressed CSI to evaluate the predicted CSI; and generate a new NDPA based on the evaluation of the predicted CSI.
  14. 14. The system of any of claims 9 to 13, the processing unit being further operative to: compare the predicted CSI and the compressed CSI to evaluate the predicted CSI; and based on the evaluation of the predicted CSI, determine a number of sounding intervals to skip sending additional NDPAs to the STA.
  15. 15. The system of any of claims 9 to 14, where the processing unit is configured to perform the method of any of claims 6 to 8.
  16. 16. A non-transitory computer-readable medium that stores a set of instructions which when executed perform a method executed by the set of instructions comprising: generating predicted Channel State information (CSI) of a Station (STA); sending a Null Data Packet (NDP) Announcement (NDPA) to the STA, wherein the NDPA instructs the STA to send compressed CSI; sending a reference signal to the STA; and receiving the compressed CSI from the STA.
  17. 17. The non-transitory computer-readable medium of claim 16, wherein: the predicted CSI comprises a predicted feedback matrix; and the compressed CSI comprises a compressed feedback matrix.
  18. 18. The non-transitory computer-readable medium of claim 16 or claim 17, the method executed by the set of instructions further comprising: determining to send additional NDPAs to the STA every other subsequent sounding interval and skip sending additional NDPAs to the STA for remaining sounding intervals.
  19. 19. The non-transitory computer-readable medium of any of claims 16 to 18, wherein generating predicted CSI of STA comprises any one of: (i) determining a channel state trend using an amount of previous CSI from the STA and trajectory determination techniques, and predicting the predicted CSI based on the channel state trend; (ii) predicting the predicted CSI based on changes in information associated with other STAs in a cell; or (iii) a combination of (i) and (ii).
  20. 20. The non-transitory computer-readable medium of any of claims 16 to 19, the method executed by the set of instructions further comprising: comparing the predicted CSI and the compressed CSI to evaluate the predicted CSI; and generating a new NDPA based on the evaluation of the predicted CSI.

Description

SOUNDING INTERVAL OPTIMIZATION REFERENCE TO RELATED APPLICATION [0001] This application is being filed on July 9, 2024, as a PCT International Patent Application and claims the benefit of and priority to U.S. Provisional Patent Application No. 63/512,648, filed July 9, 2023, the disclosure of which is incorporated herein by reference in its entirety. TECHNICAL FIELD [0002] The present disclosure relates generally to optimizing or otherwise improving sounding intervals. BACKGROUND [0003] In computer networking, a wireless Access Point (AP) is a networking hardware device that allows a Wi-Fi compatible client device to connect to a wired network and to other client devices. The AP usually connects to a router (directly or indirectly via a wired network) as a standalone device, but it can also be an integral component of the router itself. Several APs may also work in coordination, either through direct wired or wireless connections, or through a central system, commonly called a Wireless Local Area Network (WLAN) controller. An AP is differentiated from a hotspot, which is the physical location where Wi-Fi access to a WLAN is available. [0004] Prior to wireless networks, setting up a computer network in a business, home, or school often required running many cables through walls and ceilings in order to deliver network access to all of the network-enabled devices in the building. With the creation of the wireless AP, network users are able to add devices that access the network with few or no cables. An AP connects to a wired network, then provides radio frequency links for other radio devices to reach that wired network. Most APs support the connection of multiple wireless devices. APs are built to support a standard for sending and receiving data using these radio frequencies. BRIEF DESCRIPTION OF THE FIGURES [0005] The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate various embodiments of the present disclosure. In the drawings: [0006] FIG. 1 is a block diagram of an operating environment for sounding interval improvement in accordance with aspects of the present disclosure. [0007] FIG. 2 is a signaling diagram of a signaling process for channel sounding in accordance with aspects of the present disclosure. [0008] FIG. 3 is a flow chart of a method for sounding interval improvement in accordance with aspects of the present disclosure. [0009] FIG. 4 is a block diagram of a computing device in accordance with aspects of the present disclosure. [0010] FIG. 5 is a block diagram of a wireless device in accordance with aspects of the present disclosure. DETAILED DESCRIPTION OVERVIEW [0011] Optimizing or otherwise improving sounding intervals may be provided. Improving sounding intervals can include generating predicted Channel State information (CSI) of a Station (STA). A Null Data Packet (NDP) Announcement (NDPA) can be sent to the STA, wherein the NDPA instructs the STA to send compressed CSI. A reference signal is then sent to the STA. Finally, the compressed CSI is received from the STA. [0012] Both the foregoing overview and the following example embodiments are examples and explanatory only and should not be considered to restrict the disclosure’s scope, as described, and claimed. Furthermore, features and/or variations may be provided in addition to those described. For example, embodiments of the disclosure may be directed to various feature combinations and sub-combinations described in the example embodiments. EXAMPLE EMBODIMENTS [0013] The following detailed description refers to the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the following description to refer to the same or similar elements. While embodiments of the disclosure may be described, modifications, adaptations, and other implementations are possible. For example, substitutions, additions, or modifications may be made to the elements illustrated in the drawings, and the methods described herein may be modified by substituting, reordering, or adding stages to the disclosed methods. Accordingly, the following detailed description does not limit the disclosure. Instead, the proper scope of the disclosure is defined by the appended claims. [0014] Wireless networks can be implemented in high density environments that require support for hundreds or more clients in a given area. Additionally, next generation Wi-Fi standards (e.g., the Institute of Electrical and Electronics Engineers (IEEE) 802.11 bn) will likely enable the implementation of an increasing number of Spatial Streams (SSs) and other Multiple-Input Multiple- Output techniques. Improving networking functions and operation is therefore important to accommodate the large amount of traffic that can result from high density environments and Multiple-Input Multiple-Output (MIMO) techniques to ensure stable and intended network operation. [0015] One technique for improving networ