Communication methods, electronic devices and storage media
By carrying identification information in the wireless frame to instruct site equipment to switch and reserve resources, the problem of access point equipment switching for low-latency services in wireless LANs is solved, and the rapid recovery of low-latency services is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BEIJING XIAOMI MOBILE SOFTWARE CO LTD
- Filing Date
- 2022-12-05
- Publication Date
- 2026-05-26
AI Technical Summary
In wireless LANs, when site devices are transmitting low-latency services, the access point device handover mechanism is unable to meet the need for rapid handover, resulting in increased service latency.
By carrying identification information in the radio frame, the site device is instructed to switch from the first access point device to the second access point device, and resources are reserved to support low-latency services, ensuring that transmission can be resumed quickly after the switch.
It enables rapid recovery of low-latency services during access point device switching, thus meeting the transmission requirements of low-latency services.
Smart Images

Figure CN118476271B_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of mobile communication technology, and more specifically, to a communication method, an electronic device, and a storage medium. Background Technology
[0002] With the rapid development of mobile communication technology, Wireless Fidelity (Wi-Fi) technology has made significant progress in transmission rates and throughput. Current research in Wi-Fi technology focuses on areas such as Ultra High Reliability (UHR), with the vision of improving the reliability of Wireless Local Area Networks (WLAN) connections, reducing latency, enhancing manageability, increasing throughput at different signal-to-noise ratio (SNR) levels, and reducing device-level power consumption. Furthermore, in UHR, to improve system throughput, methods for simultaneous communication in the sub-7GHz and 45GHz and / or 60GHz frequency bands have been proposed.
[0003] In UHR, the low-latency service transmission mechanism will be further enhanced. When transmitting low-latency services, site equipment may experience access point device (or multiple connected access point devices) switching; therefore, a mechanism is needed to support access point device switching when transmitting low-latency services. Summary of the Invention
[0004] This disclosure provides a communication method, electronic device, and storage medium to provide a mechanism for switching access point devices when supporting the transmission of low-latency services.
[0005] On one hand, embodiments of this disclosure provide a communication method applied to a site device, the method comprising:
[0006] A first radio frame is determined; wherein the first radio frame includes first identification information, the first identification information indicating that the site device switches from a first access point device to a second access point device, and the service transmitted by the site device is a low-latency service;
[0007] Send the first wireless frame to instruct the second access point device to reserve resources for the low-latency service.
[0008] On the other hand, this disclosure also provides a communication method applied to a second access point device, the method comprising:
[0009] Receive the first wireless frame;
[0010] The first wireless frame includes first identification information, which indicates that the site device switches from the first access point device to the second access point device, and the service transmitted by the site device is a low-latency service; the first identification information indicates that the second access point device reserves resources for the low-latency service.
[0011] On the other hand, this disclosure also provides an electronic device, which is a site device, and the electronic device includes:
[0012] A determination module is used to determine a first radio frame; wherein the first radio frame includes first identification information, the first identification information indicating that the site device switches from a first access point device to a second access point device, and the service transmitted by the site device is a low-latency service;
[0013] The transmitting module is used to transmit the first wireless frame, instructing the second access point device to reserve resources for the low-latency service.
[0014] On the other hand, this disclosure also provides an electronic device, which is a second access point device, and the electronic device includes:
[0015] The receiving module is used to receive the first radio frame;
[0016] The first wireless frame includes first identification information, which indicates that the site device switches from the first access point device to the second access point device, and the service transmitted by the site device is a low-latency service; the first identification information indicates that the second access point device reserves resources for the low-latency service.
[0017] This disclosure also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement one or more of the methods described in this disclosure.
[0018] This disclosure also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements one or more of the methods described in this disclosure.
[0019] In this embodiment, the STA determines a first radio frame, which includes first identification information. This first identification information indicates that the site device is switching from a first access point device to a second access point device, and the service transmitted by the site device is a low-latency service. The STA sends the first radio frame to the second access point device, causing the second access point device to reserve resources for the low-latency service transmitted by the STA upon receiving the first radio frame. This ensures that the low-latency service can quickly resume transmission after the STA switches to the second access point device, meeting the latency requirements of the low-latency service. This embodiment provides a mechanism for access point device switching when transmitting low-latency services.
[0020] Additional aspects and advantages of embodiments of this disclosure will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of this disclosure. Attached Figure Description
[0021] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 One of the flowcharts for the communication method provided in the embodiments of this disclosure;
[0023] Figure 2 This is one of the schematic diagrams of a first example of an embodiment of this disclosure;
[0024] Figure 3 This is a second schematic diagram illustrating a first example of an embodiment of this disclosure;
[0025] Figure 4 A second flowchart illustrating the communication method provided in this embodiment of the disclosure;
[0026] Figure 5 This is one of the structural schematic diagrams of the electronic device provided in the embodiments of this disclosure;
[0027] Figure 6 This is a second schematic diagram of the structure of the electronic device provided in the embodiments of this disclosure;
[0028] Figure 7 This is the third schematic diagram of the structure of the electronic device provided in the embodiments of this disclosure. Detailed Implementation
[0029] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. Unless otherwise indicated, the same numerals in different drawings denote the same or similar elements in the following description relating to the drawings. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.
[0030] In this disclosure, the terminology used is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more associated listed items. For example, A and / or B can represent: A alone, A and B together, and B alone. The character “ / ” generally indicates that the preceding and following objects are in an “or” relationship. The term “multiple” refers to two or more; therefore, in this disclosure, “multiple” may also be understood as “at least two.”
[0031] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, for example, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."
[0032] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.
[0033] This disclosure provides a communication method, electronic device, and storage medium to provide a mechanism for switching access point devices when supporting the transmission of low-latency services.
[0034] The method and apparatus are based on the same concept of the application. Since the methods and apparatus solve problems in similar ways, the implementation of the apparatus and methods can refer to each other, and the repeated parts will not be described again.
[0035] like Figure 1As shown in the illustration, this disclosure provides a communication method. Optionally, the method can be applied to a station (STA). Optionally, in this disclosure, the STA is, for example, an electronic device with wireless network access capabilities, which provides frame delivery services to enable information transmission. The access point (AP) device is, for example, a device with wireless-to-wired bridging capabilities, which is responsible for extending the services provided by the wired network to the wireless network.
[0036] The method may include the following steps:
[0037] Step 101: Determine the first radio frame; wherein the first radio frame includes first identification information, the first identification information indicating that the site device switches from the first access point device to the second access point device, and the service transmitted by the site device is a low latency service.
[0038] In a wireless local area network (WLAN), a Basic Service Set (BSS) can consist of an Access Point (AP) and one or more Stations (STAs) communicating with the AP. A BSS can connect to a Distribution System (DS) via its AP, and then connect to another BSS to form an Extended Service Set (ESS). See [link to first example] for further details. Figure 2 AP1 and STA1 constitute BSS1, and AP2 and STA2 constitute BSS2. When the coverage of two or more BSSs overlap, they form an Overlapping Basic Service Set (OBSS), such as... Figure 2 In the middle, BSS1 and BSS2 overlap to form OBSS.
[0039] Optionally, in this embodiment of the disclosure, AP and STA can be devices that support multiple connections, for example, they can be represented as AP MLD and non-AP MLD respectively; AP MLD can represent an access point that supports multiple connection communication functions, and non-AP MLD can represent a station that supports multiple connection communication functions.
[0040] Reference Figure 3 An AP MLD can include three auxiliary APs, such as Figure 3The diagram shows AP1, AP2, and AP3; each AP can operate in connection 1, connection 2, and connection 3 respectively; a non-AP MLD can also include three auxiliary STAs, such as... Figure 2 The diagram shows STA1, STA2, and STA3; STA1 operates at connection 1, STA2 operates at connection 2, and STA3 operates at connection 3.
[0041] For ease of description, the following primarily describes an example of communication between an AP and a STA in a multi-connection environment; however, the exemplary embodiments of this disclosure are not limited thereto. Figure 3 In the example, assume AP1 communicates with STA1 via the corresponding first connection Link 1; similarly, AP2 communicates with STA2 via the corresponding second connection Link 2, and AP communicates with STA3 via the third connection Link 3. Furthermore, Links 1 to 3 can be multiple connections at different frequencies, such as connections at 2.4GHz, 5GHz, and 6GHz, or several connections with the same or different bandwidths at 2.4GHz. Additionally, multiple channels can exist under each connection. It is understood that... Figure 2 The communication scenarios shown are merely exemplary, and the present disclosure is not limited thereto. For example, the AP MLD can connect to multiple (three) non-AP MLDs, or under each connection, the AP can communicate with multiple other types of sites.
[0042] In UHR, the low-latency service transmission mechanism will be further enhanced. During the transmission of low-latency services by the STA, there may be scenarios where the STA switches between APs. It is understood that in the embodiments of this disclosure, the AP can be an APMLD. For ease of explanation, the AP will be used as an example to describe the embodiments of this disclosure. However, this does not constitute a limitation on the embodiments of this disclosure.
[0043] In scenarios where a STA switches between APs, such as when the STA's location changes and it is communicating with AP1 for low-latency services or through AP1's management for low-latency services (e.g., Tunneled DirectLink Setup), it needs to switch to AP2 to continue transmitting low-latency services. To meet the latency requirements of low-latency services, the STA determines a first radio frame. Optionally, the first radio frame includes an authentication confirm frame. The first radio frame carries first identification information, which indicates that the STA is about to switch from the first access point device (i.e., Current AP) to the second access point device (i.e., Target AP), and the service transmitted by the site device is a low-latency service. Thus, when the second access point device receives the first radio frame, it can reserve resources (network resources or transmission resources, such as the link, bandwidth, etc. allocated for the low-latency service) according to the first identification information, enabling the STA to quickly switch to the second access point device and meet the transmission latency and rate requirements of the low-latency service.
[0044] Step 102: Send the first wireless frame to instruct the second access point device to reserve resources for the low-latency service.
[0045] The STA sends a first radio frame to the second access point device, enabling the second access point device to reserve resources for the low-latency service transmitted by the STA upon receiving the first radio frame. This ensures that the low-latency service can quickly resume transmission after the STA switches to the second access point device, meeting the latency requirements of the low-latency service. This disclosure provides a mechanism for access point device handover when supporting the transmission of low-latency services.
[0046] This disclosure provides a communication method, optionally applicable to a site device, the method comprising:
[0047] A first radio frame is determined; wherein the first radio frame includes first identification information, the first identification information indicating that the site device switches from a first access point device to a second access point device, and the service transmitted by the site device is a low-latency service;
[0048] Send the first wireless frame to instruct the second access point device to reserve resources for the low-latency service.
[0049] The first identification information is carried in the first Quality of Service (QoS) characteristic information element; the QoS characteristic information element includes a set of parameters that define the characteristics of uplink and downlink service flows in the STA; as a second example, see Table 1 below:
[0050] Table 1:
[0051]
[0052]
[0053] Wherein, the first identification information includes any one of the following (1) to (3):
[0054] (1) The first identification information includes a first identification bit, which is carried in the control information field of the first QoS characteristic information element; the first identification bit is carried in the ControlInfo field of the QoS characteristic information element; as a third example, the format of the ControlInfo field is shown in Table 2 below:
[0055] Table 2:
[0056]
[0057] Optionally, the first identifier bit occupies one bit to identify low-latency services, for example, occupying one bit in the reserved bits.
[0058] (2) The first identification information includes a second identification bit, which is carried in the delay bound field of the first QoS characteristic information element; for example, if the delay range indicated by the parameter in the delay bound field is not greater than M milliseconds (ms), then the transmitted service is identified as a low-latency service. Optionally, M can be 10 or other values.
[0059] (3) The first identification information includes a third identification bit, which is carried in the service start time subfield of the control information field of the first QoS characteristic information element. For example, if the service start time indicated by the parameter in the service start time subfield is not greater than microseconds (ms), then the transmitted service is identified as a low-latency service. Optionally, N can be 0 or other values.
[0060] This disclosure provides a communication method, optionally applicable to a site device, the method comprising:
[0061] A first radio frame is determined; wherein the first radio frame includes first identification information, the first identification information indicating that the site device switches from a first access point device to a second access point device, and the service transmitted by the site device is a low-latency service;
[0062] Send the first wireless frame to instruct the second access point device to reserve resources for the low-latency service.
[0063] The first radio frame includes second identification information, which instructs the station device to request a reserved channel from the second access point device to establish TDLS resources or peer-to-peer (P2P) transmission resources, so that the STA can quickly switch to the second access point device during handover to meet the transmission latency and rate requirements of low-latency services; for example, the STA is a Fast Transition Originator (FTO) STA.
[0064] Referring to Table 2 above, the second identification information is carried in the direction subfield of the control information field of the first QoS characteristic information element.
[0065] Optionally, in this embodiment of the disclosure, the first QoS characteristic information element is carried in the RICrequest information element.
[0066] The first QoS characteristic information element can be carried within a Resource Information Container (RIC) information element. As a fourth example, the format of the RIC information element is shown in Table 3 below:
[0067] Table 3:
[0068]
[0069] RIC information elements are sets of elements used to represent resource requests or resource responses; Table 3 uses resource requests as an example, and the resource type of a resource request can be QoS. The resource descriptor definition for QoS is shown in Table 4 below:
[0070] Table 4:
[0071]
[0072]
[0073]
[0074] This disclosure provides a communication method, optionally applicable to a site device, the method comprising:
[0075] A first radio frame is determined; wherein the first radio frame includes first identification information, the first identification information indicating that the site device switches from a first access point device to a second access point device, and the service transmitted by the site device is a low-latency service;
[0076] Send the first wireless frame to instruct the second access point device to reserve resources for the low-latency service.
[0077] The first wireless frame includes third identification information, which indicates that the station device supports multi-connection communication and has completed multi-connection key negotiation with the second access point device; for example, in a scenario where FTO STA supports multi-connection.
[0078] This disclosure provides a communication method, optionally applicable to a site device, the method comprising:
[0079] A first radio frame is determined; wherein the first radio frame includes first identification information, the first identification information indicating that the site device switches from a first access point device to a second access point device, and the service transmitted by the site device is a low-latency service;
[0080] Send the first wireless frame to instruct the second access point device to reserve resources for the low-latency service.
[0081] The first wireless frame includes fourth identification information, which indicates that the site device requests a connection to transmit the low-latency service. For example, in a multi-connection scenario, it identifies which connection in the multi-connection the low-latency service is transmitted, or identifies downlink low-latency service and uplink low-latency service.
[0082] The fourth identification information is carried in the link bitmap field of the first wireless frame.
[0083] This disclosure provides a communication method, optionally applicable to a site device, the method comprising:
[0084] A first radio frame is determined; wherein the first radio frame includes first identification information, the first identification information indicating that the site device switches from a first access point device to a second access point device, and the service transmitted by the site device is a low-latency service;
[0085] Send the first wireless frame to instruct the second access point device to reserve resources for the low-latency service;
[0086] The second radio frame is received, and the fifth identification information carried in the second radio frame is obtained; the fifth identification information indicates the resource information reserved by the second access point device for the low latency service.
[0087] Upon receiving the first radio frame, the second access point device reserves resources for the low-latency service transmitted by the STA based on the first identification information. This ensures that the low-latency service can quickly resume transmission after the STA switches to the second access point device, meeting the latency requirements of the low-latency service. Specifically, the second access point device carries fifth identification information in the second radio frame. This fifth identification information indicates the resource information reserved by the second access point device for the low-latency service, such as network resources or transmission resources, such as the connection link and bandwidth (BW) allocated for the low-latency service.
[0088] This disclosure provides a communication method, optionally applicable to a site device, the method comprising:
[0089] A first radio frame is determined; wherein the first radio frame includes first identification information, the first identification information indicating that the site device switches from a first access point device to a second access point device, and the service transmitted by the site device is a low-latency service;
[0090] Send the first wireless frame to instruct the second access point device to reserve resources for the low-latency service;
[0091] The second access point device receives a second radio frame and obtains the fifth identification information carried in the second radio frame; the fifth identification information indicates the resource information reserved by the second access point device for the low-latency service. The reserved resource information includes the target connection allocated for the low-latency service;
[0092] The target connection is the same as the connection requested by the site device.
[0093] In the first radio frame, the STA identifies the link information requested to transmit the low-latency service, and the second access point device allocates a target connection to the STA; if the second access point device is an AP MLD, the AP MLD can satisfy the link information requested by the STA according to the load under each link, and the link information allocated to the STA is consistent with the link information requested by the STA.
[0094] This disclosure provides a communication method, optionally applicable to a site device, the method comprising:
[0095] A first radio frame is determined; wherein the first radio frame includes first identification information, the first identification information indicating that the site device switches from a first access point device to a second access point device, and the service transmitted by the site device is a low-latency service;
[0096] Send the first wireless frame to instruct the second access point device to reserve resources for the low-latency service;
[0097] The second access point device receives a second radio frame and obtains the fifth identification information carried in the second radio frame; the fifth identification information indicates the resource information reserved by the second access point device for the low-latency service. The reserved resource information includes the target connection allocated for the low-latency service;
[0098] The target connection is different from the connection requested by the site device.
[0099] If the second access point device is an AP MLD, the link information assigned to the STA by the AP MLD may be inconsistent with the link information requested by the STA based on the load of each link; or if the STA does not identify link information in the first radio frame, the AP MLD may also assign a link to the STA to transmit low-latency services based on the load of each link.
[0100] Optionally, in this embodiment of the disclosure, the first wireless frame includes an authentication confirm frame;
[0101] The second wireless frame includes an authentication ACK frame.
[0102] This disclosure provides a communication method, optionally applicable to a site device, the method comprising:
[0103] A first radio frame is determined; wherein the first radio frame includes first identification information, the first identification information indicating that the site device switches from a first access point device to a second access point device, and the service transmitted by the site device is a low-latency service;
[0104] Send the first wireless frame to instruct the second access point device to reserve resources for the low-latency service;
[0105] The second radio frame is received, and the fifth identification information carried in the second radio frame is obtained. The fifth identification information indicates the resource information reserved by the second access point device for the low-latency service. The fifth identification information is carried in the second QoS characteristic information element of the second radio frame, and the second QoS characteristic information element is carried in the resource information container RIC response information element. The format of the second QoS characteristic information element is as described in Tables 1 and 2 above, and the format of the RIC response information element is as described in Tables 3 and 4 above, and will not be repeated here.
[0106] In this embodiment, the STA determines a first radio frame, which includes first identification information. This first identification information indicates that the site device is switching from a first access point device to a second access point device, and the service transmitted by the site device is a low-latency service. The STA sends the first radio frame to the second access point device, causing the second access point device to reserve resources for the low-latency service transmitted by the STA upon receiving the first radio frame. This ensures that the low-latency service can quickly resume transmission after the STA switches to the second access point device, meeting the latency requirements of the low-latency service. This embodiment provides a mechanism for access point device switching when transmitting low-latency services.
[0107] See Figure 4 This disclosure provides a communication method, which can optionally be applied to a network device, wherein the network device may be a second access point device, and the method may include the following steps:
[0108] Step 401: Receive the first wireless frame;
[0109] The first wireless frame includes first identification information, which indicates that the site device switches from the first access point device to the second access point device, and the service transmitted by the site device is a low-latency service; the first identification information indicates that the second access point device reserves resources for the low-latency service.
[0110] The architecture of the WLAN used in the communication method provided in this embodiment is the same as the first example described above, and will not be repeated here.
[0111] In UHR, the low-latency service transmission mechanism will be further enhanced. During the transmission of low-latency services by the STA, there may be scenarios where the STA switches between APs. It is understood that in the embodiments of this disclosure, the AP can be an APMLD. For ease of explanation, the AP will be used as an example to describe the embodiments of this disclosure. However, this does not constitute a limitation on the embodiments of this disclosure.
[0112] In scenarios where a STA switches between APs, such as when the STA's location changes and it is communicating with AP1 for low-latency services or through AP1's management for low-latency services (e.g., Tunneled DirectLink Setup), it needs to switch to AP2 to continue transmitting low-latency services. To meet the latency requirements of low-latency services, the STA determines a first radio frame. Optionally, the first radio frame includes an authentication confirm frame. The first radio frame carries first identification information, which indicates that the STA is about to switch from the first access point device (i.e., Current AP) to the second access point device (i.e., Target AP), and the service transmitted by the site device is a low-latency service. Thus, when the second access point device receives the first radio frame, it can reserve resources (network resources or transmission resources, such as the link, bandwidth, etc. allocated for the low-latency service) according to the first identification information, enabling the STA to quickly switch to the second access point device and meet the transmission latency and rate requirements of the low-latency service.
[0113] After receiving the first radio frame, the second access point device reserves resources for the low-latency service transmitted by the STA, ensuring that the low-latency service can quickly continue transmission after the STA switches to the second access point device, thus meeting the latency requirements of the low-latency service. This disclosure provides a mechanism for access point device switching when supporting the transmission of low-latency services.
[0114] This disclosure provides a communication method, optionally applicable to a network device, which may be a second access point device. The method may include the following steps:
[0115] Receive the first wireless frame;
[0116] The first wireless frame includes first identification information, which indicates that the site device switches from the first access point device to the second access point device, and the service transmitted by the site device is a low-latency service; the first identification information indicates that the second access point device reserves resources for the low-latency service.
[0117] The first identification information is carried in the first QoS characteristic information element; the QoS characteristic information element includes a set of parameters that define the characteristics of uplink and downlink service flows in the STA; the format of the first QoS characteristic information element is as described in Table 1 above, and will not be repeated here.
[0118] The first identification information is carried in the first Quality of Service (QoS) characteristic information element; the first identification information includes any one of the following:
[0119] (1) The first identification information includes a first identification bit, which is carried in the control information field of the first QoS characteristic information element; the first identification bit is carried in the ControlInfo field of the QoS characteristic information element; the format of the ControlInfo field is referred to Table 2 above, and will not be repeated here. The first identification bit occupies one bit to identify low latency service, for example, it occupies one bit of the reserved bit.
[0120] (2) The first identification information includes a second identification bit, which is carried in the delay bound field of the first QoS characteristic information element; for example, if the delay range indicated by the parameter in the delay bound field is not greater than M milliseconds (ms), then the transmitted service is identified as a low-latency service. Optionally, M can be 10 or other values.
[0121] (3) The first identification information includes a third identification bit, which is carried in the service start time subfield of the control information field of the first QoS characteristic information element. For example, if the service start time indicated by the parameter in the service start time subfield is not greater than microseconds (ms), then the transmitted service is identified as a low-latency service. Optionally, N can be 0 or other values.
[0122] This disclosure provides a communication method, optionally applicable to a network device, which may be a second access point device. The method may include the following steps:
[0123] Receive the first wireless frame;
[0124] The first wireless frame includes first identification information, which indicates that the site device switches from the first access point device to the second access point device, and the service transmitted by the site device is a low-latency service; the first identification information indicates that the second access point device reserves resources for the low-latency service.
[0125] The first radio frame includes second identification information, which instructs the station device to apply to the second access point device for a reserved channel to directly connect and establish TDLS resources or point-to-point transmission P2P resources; so that the STA can quickly switch to the second access point device during handover to meet the transmission latency and rate requirements of low-latency services; for example, the STA is a Fast Transition Originator (FTO) STA.
[0126] Referring to Table 2 above, the second identification information is carried in the direction subfield of the control information field of the first QoS characteristic information element.
[0127] Optionally, in this embodiment of the disclosure, the first QoS characteristic information element is carried in the RICrequest information element, and the RIC information element is used to represent a set of elements for a resource request or resource response; the format of the RIC information element is shown in Table 3 above, and will not be repeated here.
[0128] This disclosure provides a communication method, optionally applicable to a network device, which may be a second access point device. The method may include the following steps:
[0129] Receive the first wireless frame;
[0130] The first wireless frame includes first identification information, which indicates that the site device switches from the first access point device to the second access point device, and the service transmitted by the site device is a low-latency service; the first identification information indicates that the second access point device reserves resources for the low-latency service.
[0131] The first wireless frame includes third identification information, which indicates that the station device supports multi-connection communication and has completed multi-connection key negotiation with the second access point device; for example, in a scenario where FTO STA supports multi-connection.
[0132] This disclosure provides a communication method, optionally applicable to a network device, which may be a second access point device. The method may include the following steps:
[0133] Receive the first wireless frame;
[0134] The first wireless frame includes first identification information, which indicates that the site device switches from the first access point device to the second access point device, and the service transmitted by the site device is a low-latency service; the first identification information indicates that the second access point device reserves resources for the low-latency service.
[0135] The first wireless frame includes fourth identification information, which indicates that the site device requests a connection to transmit the low-latency service. For example, in a multi-connection scenario, it identifies which connection in the multi-connection the low-latency service is transmitted, or identifies downlink low-latency service and uplink low-latency service.
[0136] The fourth identification information is carried in the link bitmap field of the first wireless frame.
[0137] This disclosure provides a communication method, optionally applicable to a network device, which may be a second access point device. The method may include the following steps:
[0138] Receive the first wireless frame;
[0139] The first wireless frame includes first identification information, which indicates that the site device switches from the first access point device to the second access point device, and the service transmitted by the site device is a low-latency service; the first identification information indicates that the second access point device reserves resources for the low-latency service.
[0140] A second radio frame is sent, carrying fifth identification information; the fifth identification information indicates the resource information reserved by the second access point device for the low latency service.
[0141] Upon receiving the first radio frame, the second access point device reserves resources for the low-latency service transmitted by the STA based on the first identification information. This ensures that the low-latency service can quickly resume transmission after the STA switches to the second access point device, meeting the latency requirements of the low-latency service. Specifically, the second access point device carries fifth identification information in the second radio frame. This fifth identification information indicates the resource information reserved by the second access point device for the low-latency service, such as network resources or transmission resources, such as the connection link and bandwidth (BW) allocated for the low-latency service.
[0142] This disclosure provides a communication method, optionally applicable to a network device, which may be a second access point device. The method may include the following steps:
[0143] Receive the first wireless frame;
[0144] The first wireless frame includes first identification information, which indicates that the site device switches from the first access point device to the second access point device, and the service transmitted by the site device is a low-latency service; the first identification information indicates that the second access point device reserves resources for the low-latency service.
[0145] The reserved resource information includes the target connection allocated for the low-latency service; the target connection is the same as the connection applied for by the site equipment.
[0146] In the first radio frame, the STA identifies the link information requested to transmit the low-latency service, and the second access point device allocates a target connection to the STA; if the second access point device is an AP MLD, the AP MLD can satisfy the link information requested by the STA according to the load under each link, and the link information allocated to the STA is consistent with the link information requested by the STA.
[0147] This disclosure provides a communication method, optionally applicable to a network device, which may be a second access point device. The method may include the following steps:
[0148] Receive the first wireless frame;
[0149] The first wireless frame includes first identification information, which indicates that the site device switches from the first access point device to the second access point device, and the service transmitted by the site device is a low-latency service; the first identification information indicates that the second access point device reserves resources for the low-latency service.
[0150] The reserved resource information includes the target connection allocated for the low-latency service; the target connection is the same as the connection applied for by the site equipment.
[0151] If the second access point device is an AP MLD, the link information assigned to the STA by the AP MLD may be inconsistent with the link information requested by the STA based on the load of each link; or if the STA does not identify link information in the first radio frame, the AP MLD may also assign a link to the STA to transmit low-latency services based on the load of each link.
[0152] This disclosure provides a communication method, optionally applicable to a network device, which may be a second access point device. The method may include the following steps:
[0153] Receive the first wireless frame;
[0154] The first wireless frame includes first identification information, which indicates that the site device switches from the first access point device to the second access point device, and the service transmitted by the site device is a low-latency service; the first identification information indicates that the second access point device reserves resources for the low-latency service.
[0155] The fifth identification information is carried in the second QoS characteristic information element of the second radio frame, and the second QoS characteristic information element is carried in the resource information container RIC response information element. The format of the second QoS characteristic information element is as described in Tables 1 and 2 above, and the format of the RIC response information element is as described in Tables 3 and 4 above, and will not be repeated here.
[0156] Optionally, in this embodiment of the disclosure, the first wireless frame includes an authentication confirm frame;
[0157] The second wireless frame includes an authentication ACK frame.
[0158] Optionally, in this embodiment of the disclosure, the first QoS characteristic information element is carried in the RICrequest information element.
[0159] In this embodiment of the disclosure, the second access point device receives a first radio frame, which includes first identification information indicating that the station device is switching from the first access point device to the second access point device, and the service transmitted by the station device is a low-latency service. The STA sends the first radio frame to the second access point device; after receiving the first radio frame, the second access point device reserves resources for the low-latency service transmitted by the STA, ensuring that the low-latency service can quickly continue transmission after the STA switches to the second access point device, thus meeting the latency requirements of the low-latency service. This embodiment of the disclosure provides a mechanism for access point device switching when supporting the transmission of low-latency services.
[0160] See Figure 5 Based on the same principles as the methods provided in the embodiments of this disclosure, the embodiments of this disclosure also provide an electronic device, which is a site device, and the electronic device includes:
[0161] The determining module 501 is used to determine a first radio frame; wherein the first radio frame includes first identification information, the first identification information indicating that the site device switches from a first access point device to a second access point device, and the service transmitted by the site device is a low-latency service;
[0162] The sending module 502 is used to send the first wireless frame, instructing the second access point device to reserve resources for the low-latency service.
[0163] In an optional embodiment, the first identification information is carried in the first Quality of Service (QoS) characteristic information element;
[0164] The first identification information includes any one of the following:
[0165] The first identification information includes a first identification bit, which is carried in the control information field of the first QoS characteristic information element;
[0166] The first identification information includes a second identification bit, which is carried in the delay bound field of the first QoS characteristic information element;
[0167] The first identification information includes a third identification bit, which is carried in the service start time subfield of the control information field of the first QoS characteristic information element;
[0168] In an optional embodiment, the first wireless frame includes second identification information, which instructs the site device to request the second access point device to reserve a channel for direct connection to establish TDLS resources or to transmit P2P resources directly;
[0169] The second identification information is carried in the direction subfield of the control information field of the first QoS characteristic information element.
[0170] In an optional embodiment, the first wireless frame includes third identification information, which indicates that the site device supports multi-connection communication and has completed multi-connection key negotiation with the second access point device.
[0171] In an optional embodiment, the first wireless frame includes fourth identification information, which indicates that the site device requests a connection to transmit the low-latency service.
[0172] The fourth identification information is carried in the link bitmap field of the first wireless frame.
[0173] In an optional embodiment, the electronic device further includes:
[0174] The second receiving module is used to receive the second radio frame and obtain the fifth identification information carried in the second radio frame; the fifth identification information indicates the resource information reserved by the second access point device for the low latency service.
[0175] In one alternative embodiment, the reserved resource information includes the target connection allocated for the low-latency service.
[0176] In an optional embodiment, the fifth identification information is carried in the second QoS characteristic information element of the second radio frame, and the second QoS characteristic information element is carried in the resource information container (RIC) response information element.
[0177] In an optional embodiment, the first wireless frame includes an authentication confirm frame;
[0178] The second wireless frame includes an authentication ACK frame.
[0179] In an optional embodiment, the first QoS characteristic information element is carried in the RICrequest information element.
[0180] This disclosure also provides a communication device applied to site equipment, the device comprising:
[0181] A wireless frame determination module is used to determine a first wireless frame; wherein the first wireless frame includes first identification information, the first identification information indicating that the site device switches from a first access point device to a second access point device, and the service transmitted by the site device is a low-latency service;
[0182] A wireless frame transmission module is used to transmit the first wireless frame, instructing the second access point device to reserve resources for the low-latency service.
[0183] The device also includes other modules of the electronic device described in the foregoing embodiments, which will not be described in detail here.
[0184] See Figure 6 Based on the same principles as the methods provided in the embodiments of this disclosure, the embodiments of this disclosure also provide a network device, which may be a second access point device, and the electronic device includes:
[0185] Receiver module 601 is used to receive the first radio frame;
[0186] The first wireless frame includes first identification information, which indicates that the site device switches from the first access point device to the second access point device, and the service transmitted by the site device is a low-latency service; the first identification information indicates that the second access point device reserves resources for the low-latency service.
[0187] In an optional embodiment, the first identification information is carried in the first Quality of Service (QoS) characteristic information element;
[0188] The first identification information includes any one of the following:
[0189] The first identification information includes a first identification bit, which is carried in the control information field of the first QoS characteristic information element;
[0190] The first identification information includes a second identification bit, which is carried in the delay bound field of the first QoS characteristic information element;
[0191] The first identification information includes a third identification bit, which is carried in the service start time subfield of the control information field of the first QoS characteristic information element.
[0192] In an optional embodiment, the first wireless frame includes second identification information, which instructs the site device to request the second access point device to reserve a channel for direct connection to establish TDLS resources or to transmit P2P resources directly;
[0193] The second identification information is carried in the direction subfield of the control information field of the first QoS characteristic information element.
[0194] In an optional embodiment, the first wireless frame includes third identification information, which indicates that the site device supports multi-connection communication and has completed multi-connection key negotiation with the second access point device.
[0195] In an optional embodiment, the first wireless frame includes fourth identification information, which indicates that the site device requests a connection to transmit the low-latency service.
[0196] The fourth identification information is carried in the link bitmap field of the first wireless frame.
[0197] In an optional embodiment, the electronic device further includes:
[0198] The second transmitting module is used to transmit a second radio frame, in which a fifth identification information is carried; the fifth identification information indicates the resource information reserved by the second access point device for the low latency service.
[0199] In one alternative embodiment, the reserved resource information includes the target connection allocated for the low-latency service.
[0200] In an optional embodiment, the fifth identification information is carried in the second QoS characteristic information element of the second radio frame, and the second QoS characteristic information element is carried in the resource information container (RIC) response information element.
[0201] In an optional embodiment, the first wireless frame includes an authentication confirm frame;
[0202] The second wireless frame includes an authentication ACK frame.
[0203] In an optional embodiment, the first QoS characteristic information element is carried in the RICrequest information element.
[0204] This disclosure also provides a communication device applied to a second access point device, the device comprising:
[0205] A wireless frame receiving module is used to receive the first wireless frame;
[0206] The first wireless frame includes first identification information, which indicates that the site device switches from the first access point device to the second access point device, and the service transmitted by the site device is a low-latency service; the first identification information indicates that the second access point device reserves resources for the low-latency service.
[0207] The device also includes other modules of the electronic device described in the foregoing embodiments, which will not be described in detail here.
[0208] In one alternative embodiment, this disclosure also provides an electronic device, such as... Figure 7 As shown, Figure 7The illustrated electronic device 700 can be a server, including a processor 701 and a memory 703. The processor 701 and the memory 703 are connected, for example, via a bus 702. Optionally, the electronic device 700 may also include a transceiver 704. It should be noted that in practical applications, the transceiver 704 is not limited to one type, and the structure of this electronic device 700 does not constitute a limitation on the embodiments of this disclosure.
[0209] Processor 701 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with this disclosure. Processor 701 may also be a combination that implements computational functions, such as including one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc.
[0210] Bus 702 may include a pathway for transmitting information between the aforementioned components. Bus 702 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. Bus 702 can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 7 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.
[0211] The memory 703 may be a ROM (Read Only Memory) or other type of static storage device capable of storing static information and instructions, RAM (Random Access Memory) or other type of dynamic storage device capable of storing information and instructions, or an EEPROM (Electrically Erasable Programmable Read Only Memory), CD-ROM (Compact Disc Read Only Memory) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited thereto.
[0212] The memory 703 is used to store application code that executes the present disclosure, and its execution is controlled by the processor 701. The processor 701 is used to execute the application code stored in the memory 703 to implement the content shown in the foregoing method embodiments.
[0213] Among them, electronic devices include, but are not limited to: mobile terminals such as mobile phones, laptops, digital radio receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), and in-vehicle terminals (such as in-vehicle navigation terminals), as well as fixed terminals such as digital TVs and desktop computers. Figure 7 The electronic device shown is merely an example and should not be construed as limiting the functionality and scope of the embodiments disclosed herein.
[0214] The server provided in this disclosure can be a standalone physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server providing basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, CDN, and big data and artificial intelligence platforms. The terminal can be a smartphone, tablet, laptop, desktop computer, smart speaker, smartwatch, etc., but is not limited to these. The terminal and server can be directly or indirectly connected via wired or wireless communication, and this disclosure does not impose any restrictions.
[0215] This disclosure provides a computer-readable storage medium storing a computer program that, when run on a computer, enables the computer to execute the corresponding content in the aforementioned method embodiments.
[0216] It should be understood that although the steps in the flowcharts of the accompanying figures are shown sequentially as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the accompanying figures may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.
[0217] It should be noted that the computer-readable medium described in this disclosure can be a computer-readable signal medium or a computer-readable storage medium, or any combination thereof. A computer-readable storage medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this disclosure, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in connection with an instruction execution system, apparatus, or device. In this disclosure, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium can be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to: wires, optical fibers, RF (radio frequency), etc., or any suitable combination thereof.
[0218] The aforementioned computer-readable medium may be included in the aforementioned electronic device; or it may exist independently and not assembled into the electronic device.
[0219] The aforementioned computer-readable medium carries one or more programs, which, when executed by the electronic device, cause the electronic device to perform the methods shown in the above embodiments.
[0220] According to one aspect of this disclosure, a computer program product or computer program is provided, comprising computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the methods provided in the various alternative implementations described above.
[0221] Computer program code for performing the operations of this disclosure can be written in one or more programming languages or a combination thereof, including object-oriented programming languages such as Java, Smalltalk, and C++, and conventional procedural programming languages such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).
[0222] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.
[0223] The modules described in the embodiments of this disclosure can be implemented in software or in hardware. The name of a module does not necessarily limit the module itself; for example, module A can also be described as "module A for performing operation B".
[0224] The above description is merely a preferred embodiment of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features disclosed in this disclosure that have similar functions.
Claims
1. A communication method applied to a station device, comprising: The method includes: A first radio frame is determined; wherein the first radio frame includes first identification information, the first identification information indicating that the site device switches from a first access point device to a second access point device, and the service transmitted by the site device is a low-latency service; the first identification information is carried in a first quality of service characteristic (QoS) information element; The first radio frame is sent to the second access point device, instructing the second access point device to reserve resources for the low-latency service.
2. The communication method according to claim 1, characterized by, The first identification information includes any one of the following: The first identification information includes a first identification bit, which is carried in the control information field of the first QoS characteristic information element; The first identification information includes a second identification bit, which is carried in the delay bound field of the first QoS characteristic information element; The first identification information includes a third identification bit, which is carried in the service start time subfield of the control information field of the first QoS characteristic information element.
3. The communication method according to claim 1, characterized in that, The first wireless frame includes second identification information, which instructs the site device to request a reserved channel from the second access point device to directly connect and establish TDLS resources or to transmit P2P resources. The second identification information is carried in the direction subfield of the control information field of the first QoS characteristic information element.
4. The communication method according to claim 1, characterized in that, The first wireless frame includes third identification information, which indicates that the site device supports multi-connection communication and has completed multi-connection key negotiation with the second access point device.
5. The communication method according to claim 1, characterized in that, The first wireless frame includes fourth identification information, which indicates that the site device requests a connection to transmit the low-latency service; the fourth identification information is carried in the link bitmap field of the first wireless frame.
6. The communication method according to claim 1, characterized in that, After sending the first wireless frame, the method further includes: The second radio frame is received, and the fifth identification information carried in the second radio frame is obtained; the fifth identification information indicates the resource information reserved by the second access point device for the low latency service.
7. The communication method according to claim 6, characterized in that, The reserved resource information includes the target connection allocated for the low-latency service.
8. The communication method according to claim 6, characterized in that, The fifth identification information is carried in the second QoS characteristic information element of the second radio frame, and the second QoS characteristic information element is carried in the resource information container (RIC) response information element.
9. The communication method according to claim 6, characterized in that, The first wireless frame includes an authentication confirm frame; The second wireless frame includes an authentication ACK frame.
10. The communication method according to claim 2 or 3, characterized in that, The first QoS characteristic information element is carried in the RIC request information element.
11. A communication method applied to a second access point device, characterized in that, The method includes: The first wireless frame sent by the receiving station device; The first wireless frame includes first identification information, which indicates that the site device switches from the first access point device to the second access point device, and the service transmitted by the site device is a low-latency service; the first identification information indicates that the second access point device reserves resources for the low-latency service; the first identification information is carried in the first quality of service characteristic (QoS) information element.
12. The communication method according to claim 11, characterized in that, The first identification information includes any one of the following: The first identification information includes a first identification bit, which is carried in the control information field of the first QoS characteristic information element; The first identification information includes a second identification bit, which is carried in the delay bound field of the first QoS characteristic information element; The first identification information includes a third identification bit, which is carried in the service start time subfield of the control information field of the first QoS characteristic information element.
13. The communication method according to claim 11, characterized in that, The first wireless frame includes second identification information, which instructs the site device to request a reserved channel from the second access point device to directly connect and establish TDLS resources or to transmit P2P resources. The second identification information is carried in the direction subfield of the control information field of the first QoS characteristic information element.
14. The communication method according to claim 11, characterized in that, The first wireless frame includes third identification information, which indicates that the site device supports multi-connection communication and has completed multi-connection key negotiation with the second access point device.
15. The communication method according to claim 11, characterized in that, The first wireless frame includes fourth identification information, which indicates that the site device requests a connection to transmit the low-latency service. The fourth identification information is carried in the link bitmap field of the first wireless frame.
16. The communication method according to claim 11, characterized in that, After receiving the first wireless frame, the method further includes: A second radio frame is sent, carrying fifth identification information; the fifth identification information indicates the resource information reserved by the second access point device for the low latency service.
17. The communication method according to claim 16, characterized in that, The reserved resource information includes the target connection allocated for the low-latency service.
18. The communication method according to claim 16, characterized in that, The fifth identification information is carried in the second QoS characteristic information element of the second radio frame, and the second QoS characteristic information element is carried in the resource information container (RIC) response information element.
19. The communication method according to claim 16, characterized in that, The first wireless frame includes an authentication confirm frame; The second wireless frame includes an authentication ACK frame.
20. The communication method according to claim 12 or 13, characterized in that, The first QoS characteristic information element is carried in the RIC request information element.
21. An electronic device, said electronic device being a site device, characterized in that, The electronic device includes: A determining module is used to determine a first radio frame; wherein the first radio frame includes first identification information, the first identification information indicating that the site device switches from a first access point device to a second access point device, and the service transmitted by the site device is a low-latency service; the first identification information is carried in a first quality of service characteristic (QoS) information element; The sending module is used to send the first radio frame to the second access point device, instructing the second access point device to reserve resources for the low-latency service.
22. An electronic device, wherein the electronic device is a second access point device, characterized in that, The electronic device includes: The receiving module is used to receive the first wireless frame sent by the site device; The first wireless frame includes first identification information, which indicates that the site device switches from the first access point device to the second access point device, and the service transmitted by the site device is a low-latency service; the first identification information indicates that the second access point device reserves resources for the low-latency service; the first identification information is carried in the first quality of service characteristic (QoS) information element.
23. An electronic device, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements the method of any one of claims 1 to 10 or the method of any one of claims 11 to 20.
24. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method of any one of claims 1 to 10 or the method of any one of claims 11 to 20.