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CN-122003851-A - Access point and terminal device

CN122003851ACN 122003851 ACN122003851 ACN 122003851ACN-122003851-A

Abstract

The access point of the embodiment is configured to transmit information between the access point and the terminal device using a plurality of radio links including the 1st radio link and the 2nd radio link. The access point includes a management portion configured to set a service period allocated to low latency traffic forwarding for at least one of the plurality of wireless links. When the 1st service period is scheduled for the 1st radio link, the management unit notifies the terminal device of scheduling information including information of each of the 1st service period and the 2nd service period, in which the 2nd service period is set at the same start time and duration as those of the 1st service period for the 2nd radio link schedule. The 1st data is transmitted via the 1st wireless link in the 1st service period. The 1st data is transmitted via the 2nd wireless link in the 2nd service period.

Inventors

  • An Tianlang
  • NAGATA KENGO
  • Yong Jinliang
  • ASAI YUSUKE
  • TAKATORI YASUSHI

Assignees

  • 恩梯梯株式会社

Dates

Publication Date
20260508
Application Date
20231012

Claims (8)

  1. 1. An access point configured to transmit information between the access point and a terminal device using a plurality of wireless links including a1 st wireless link and a 2 nd wireless link, wherein, The wireless communication device is provided with a management unit configured to set a service period allocated to low-delay traffic transfer for at least one of the plurality of wireless links, and when a1 st service period is scheduled for the 1 st wireless link, to schedule a2 nd service period for which the same start time and duration as those of the 1 st service period are set for the 2 nd wireless link, to notify the terminal device of scheduling information including information of each of the 1 st service period and the 2 nd service period, The 1 st data is transmitted via the 1 st wireless link in the 1 st service period, and the 1 st data is transmitted via the 2 nd wireless link in the 2 nd service period.
  2. 2. The access point of claim 1, wherein, When a 3 rd service period overlapping with the 1 st service period is scheduled for the 2 nd radio link before the 2 nd service period is scheduled, the management section adjusts the duration of the 2 nd service period so as not to overlap with the 3 rd service period.
  3. 3. The access point of claim 2, wherein, When a TXOP (transmission opportunity ) cannot be ensured in the 2 nd service period, the management section suspends scheduling of the 2 nd service period.
  4. 4. The access point of claim 1, wherein, The management unit transmits a trigger frame indicating transmission of the 1 st data to the terminal device using the 1 st radio link and the 2 nd radio link, respectively, based on a start time of the 1 st service period.
  5. 5. The access point according to any one of claims 1 to 4, further comprising: a1 st wireless signal processing unit for establishing the 1 st wireless link with the terminal device, and A2 nd radio signal processing unit for establishing the 2 nd radio link with the terminal device, The management unit outputs the scheduling information to the 1 st radio signal processing unit and the 2 nd radio signal processing unit, respectively, and causes the 1 st radio signal processing unit and the 2 nd radio signal processing unit to transmit a beacon signal including the scheduling information using the 1 st radio link and the 2 nd radio link, respectively.
  6. 6. The access point according to any one of claims 1 to 4, further comprising: a1 st transceiver unit connected to a1 st access point for establishing the 1 st radio link with the terminal device, and A2 nd transmitting/receiving unit connected to a2 nd access point for establishing the 2 nd radio link with the terminal device, The management unit transmits the scheduling information to the 1 st access point and the 2 nd access point via the 1 st transmission/reception unit and the 2 nd transmission/reception unit, respectively, and causes the 1 st access point and the 2 nd access point to transmit a beacon signal including the scheduling information using the 1 st radio link and the 2 nd radio link, respectively.
  7. 7. A terminal device is provided with: a1 st wireless signal processing unit that establishes a1 st wireless link with the access point; A 2 nd wireless signal processing unit that establishes a 2 nd wireless link with the access point; A data distribution unit for distributing data to the 1 st wireless signal processing unit and the 2 nd wireless signal processing unit, and A scheduling control unit configured to schedule a1 st service period for the 1 st radio link and set a2 nd service period of the same start time as the 1 st service period for the 2 nd radio link based on scheduling information received from the access point, The data distribution unit outputs 1 st data corresponding to the low delay traffic received from the upper layer to the 1 st wireless signal processing unit and the 2 nd wireless signal processing unit, respectively.
  8. 8. The terminal device according to claim 7, wherein, The 1 st wireless signal processing section and the 2 nd wireless signal processing section transmit the 1 st data to the access point, respectively, in accordance with a case where a trigger frame is received at a timing based on a start timing of the 1 st service period.

Description

Access point and terminal device Technical Field Embodiments relate to an access point and a terminal device. Background As an information communication system for performing wireless connection between an Access Point (AP) and a terminal device, a wireless LAN (local area network ) is known. The terminal device can access the network via the access point by using the wireless LAN. The IEEE 802.11be mentions multilink transmission in which a plurality of links (transmission paths) having different frequency channels are established between a terminal device and an access point. In the multilink transmission, a plurality of APs (AFFILIATED ACCESS points, accessory access points) provided in the same casing called AP-type MLD (access point multi-LINK DEVICE, access point multilink device) and a plurality of STAs (AFFILIATED STA, accessory stations) provided in the same casing called non-AP-type MLD (non-access point multi-LINK DEVICE, non-access point multilink device) communicate in pairs. Further, in the new generation of standards, a multi-AP function in which a plurality of access points coordinate and cooperate to perform communication is being studied. In addition, as a method of transmitting and receiving low delay traffic between an access point and a terminal device, an R-TWT (RESTRICTED TARGET WAKE TIME, limited target wake-up time) function is known. An access point using the R-TWT function sets a service period (R-TWT SP) in accordance with a period delay corresponding to a request for a low delay traffic, and notifies the set service period to a terminal device using a management frame such as a beacon or an action frame. Then, when it is detected that the R-TWT SP is allocated to itself by using the received beacon or the like, the terminal device (low-delay terminal) that handles the low-delay traffic transmits the low-delay traffic to the access point with certainty. In the multilink, TWT protocols in all links constituting the multilink can be set up by any pair of accessory APs and accessory STAs performing TWT protocols. An information communication system using an R-TWT function can reduce delay and jitter of low delay traffic. Prior art literature Non-patent literature Non-patent literature 1:IEEE 802.11be D4.0, "35.8 Restricted TWT (R-TWT, limited target wake time)", pages 611-616, month 7 of 2023 Disclosure of Invention Technical problem to be solved by the invention However, in the multilink transmission or the multiple AP function, the R-TWT function is set independently in each link or transmission path with each access point. Then when traffic is sent, the period in which low latency traffic can gain priority is only at the beginning of the R-TWT SP. Therefore, in a case where the scheduled low-delay traffic cannot be transmitted at the start of the R-TWT SP due to interference or the like, or in a case where communication of other low-delay traffic or non-low-delay traffic is concentrated in a link where the channel usage rate is high, communication of the low-delay traffic to be transmitted may be blocked. In this case, the required delay of the low delay traffic may not be satisfied. The present invention has been made in view of the above circumstances, and an object thereof is to provide an access point and a terminal device capable of satisfying a required delay of a low-delay traffic. Technical solution for solving technical problems The access point of the embodiment is configured to transmit information between the access point and the terminal device using a plurality of radio links including the 1st radio link and the 2nd radio link. The access point includes a management portion configured to set a service period allocated to low latency traffic forwarding for at least one of the plurality of wireless links. When the 1st service period is scheduled for the 1st radio link, the management unit notifies the terminal device of scheduling information including information of each of the 1st service period and the 2nd service period, in which the 2nd service period is set at the same start time and duration as those of the 1st service period for the 2nd radio link schedule. The 1st data is transmitted via the 1st wireless link in the 1st service period. The 1st data is transmitted via the 2nd wireless link in the 2nd service period. Effects of the invention According to the embodiments, an access point and a terminal apparatus that can satisfy a required delay of a low-delay traffic can be provided. Drawings Fig. 1 is a block diagram showing an example of the overall configuration of the information communication system according to embodiment 1. Fig. 2 is a block diagram showing an example of a hardware configuration of an access point included in the information communication system according to embodiment 1. Fig. 3 is a block diagram showing an example of a hardware configuration of a terminal device included in the information communication system according to embodiment 1