Information processing device, communication system, and information processing method

Patent metadata

Field	Value
Publication number	US-11228944-B2
Application number	US-202016775284-A
Country	US
Kind code	B2
Filing date	Jan 29, 2020
Priority date	Jul 11, 2014
Publication date	Jan 18, 2022
Grant date	Jan 18, 2022

Abstract

A communication system is a communication system that includes first and second information processing devices. The first information processing device performs control such that a signal (which is a signal having backward compatibility) serving as an index by which the second information processing device receiving a frame stops the reception of the frame is transmitted to the second information processing device. The second information processing device performs control such that the reception of the frame is stopped based on the signal (which is a signal having backward compatibility) serving as an index by which reception of the frame is stopped when the frame transmitted from the first information processing device is received.

First claim

The invention claimed is:

1. An information processing device, comprising:
processing circuitry configured to
receive an aggregated media access control protocol data unit (A-MPDU) subframe from another information processing device, the A-MPDU subframe having backward compatibility and including at least one of an address of a transmission source (Transmission Address—TA), an address of a transmission destination (Received Address—RA), or an identifier of a group;
upon detecting a frame check sequence (FCS) up to a media access control (MAC) header of the A-MPDU subframe, in a case where there is no error in data of the MAC header of the A-MPDU subframe, start a process for stopping reception of an A-MPDU including the A-MPDU subframe based on at least one of the TA, the RA, or the identifier of the group included in the MAC header of the A-MPDU subframe;
in response to starting the process for stopping the reception of the A-MPDU, determine whether the transmission destination or the transmission source of the A-MPDU of which the reception is stopped is not an information processing apparatus to which the information processing device is connected; and
set a carrier sense level for transmission in response to determining that the transmission destination or the transmission source of the A-MPDU of which the reception is stopped is not the information processing apparatus to which the information processing device is connected.

2. The information processing device according to claim 1 , wherein
the processing circuitry is configured to determine whether there is an error in the data of the MAC header based on a comparison result between the FCS and a checksum calculated based on the MAC header.

3. The information processing device according to claim 1 , wherein the processing circuitry is configured to:
determine whether there is an error in the data of the MAC header of the A-MPDU subframe; and
perform control in a manner that the reception of the A-MPDU is stopped in a case where there is the error in the data of the MAC header.

4. The information processing device according to claim 1 , wherein
in the case where there is no error in the data of the MAC header of the A-MPDU subframe, the processing circuitry is configured to determine that the reception of the A-MPDU is stopped (1) in a case in which the A-MPDU is transmitted in a unicast manner and the transmission destination of the A-MPDU is not destined for the information processing device and (2) in a case in which the A-MPDU is transmitted in a multicast manner and the transmission destination of the A-MPDU is not destined for a multicast group to which the information processing device belongs.

5. The information processing device according to claim 1 , wherein in the case where there is no error in the data of the MAC header of the A-MPDU subframe, the processing circuitry determines that the reception of the A-MPDU is stopped in a case in which the A-MPDU is transmitted in a broadcast manner and the transmission destination of the A-MPDU is not the information processing apparatus to which the information processing device is connected.

6. The information processing device according to claim 1 , wherein the processing circuitry is configured to perform control in a manner that transmission suppression is set until a reception end timing of the A-MPDU of which the reception is stopped.

7. The information processing device according to claim 6 , wherein
in a case where the transmission suppression is set, the processing circuitry performs control in a manner that an acknowledgement is transmitted in a case in which a frame destined for the information processing device is received, at least one frame among frames destined for the information processing device is correctly receivable, and it is necessary to transmit the acknowledgement to a transmission source of the frame destined for the information processing device.

8. The information processing device according to claim 6 , wherein in the case where there is no error in the data of the MAC header of the A-MPDU subframe, the processing circuitry performs control in a manner that the transmission suppression is set during a transmission suppression period decided based on information stored in the A-MPDU of which the reception is stopped.

9. An information processing method, comprising:
receiving an aggregated media access control protocol data unit (A-MPDU) subframe, by processing circuitry of an information processing device, from another information processing device, the A-MPDU subframe having backward compatibility and including at least one of an address of a transmission source (Transmission Address—TA), an address of a transmission destination (Received Address—RA), or an identifier of a group;
upon detecting a frame check sequence (FCS) up to a media access control (MAC) header of the A-MPDU subframe, in a case where there is no error in data of the MAC header of the A-MPDU subframe, starting a process for stopping reception of an A-MPDU including the A-MPDU subframe based on at least one of the TA, the RA, or the identifier of the group included in the MAC header of the A-MPDU subframe;
in response to starting the process for stopping the reception of the A-MPDU, determining, by the processing circuitry, whether the transmission destination or the transmission source of the A-MPDU of which the reception is stopped is not an information processing apparatus to which the information processing device is connected; and
setting, by the processing circuitry, a carrier sense level for transmission in response to determining that the transmission destination or the transmission source of the A-MPDU of which the reception is stopped is not the information processing apparatus to which the information processing device is connected.

10. A non-transitory computer readable medium including executable instructions, which when executed by a computer of an information processing device cause the computer to execute an information processing method, the method comprising:
receiving an aggregated media access control protocol data unit (A-MPDU) subframe from another information processing device, the A-MPDU subframe having backward compatibility and including at least one of an address of a transmission source (Transmission Address—TA), an address of a transmission destination (Received Address—RA), or an identifier of a group;
upon detecting a frame check sequence (FCS) up to a media access control (MAC) header of the A-MPDU subframe, in a case where there is no error in data of the MAC header of the A-MPDU subframe, starting a process for stopping reception of an A-MPDU including the A-MPDU subframe based on at least one of the TA, the RA, or the identifier of the group included in the MAC header of the A-MPDU subframe;
in response to starting the process for stopping the reception of the A-MPDU, determining whether the transmission destination or the transmission source of the A-MPDU of which the reception is stopped is not an information processing apparatus to which the information processing device is connected; and
setting a carrier sense level for transmission in response to determining that the transmission destination or the transmission source of the A-MPDU of which the reception is stopped is not the information processing apparatus to which the information processing device is connected.

Assignees

• Sony Corp

Inventors

• Sakai Eisuke
• Itagaki Takeshi
• Sakoda Kazuyuki
• Yamaura Tomoya

Classifications

• H04L1/0091 Primary

  arrangements specific to receivers, e.g. format detection (detection of data rate H04L25/0262; detection of coding rate H04L1/0046) · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04L1/0061

  Error detection codes · CPC title

• H04W28/12 Primary

  using signalling between network elements · CPC title

• H04W28/06

  Optimizing {the usage of the radio link}, e.g. header compression, information sizing {, discarding information (system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365)} · CPC title