US-12628045-B2 - Information processing device, communication system, and information processing method

US12628045B2US 12628045 B2US12628045 B2US 12628045B2US-12628045-B2

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.

Inventors

Eisuke Sakai
Takeshi Itagaki
Kazuyuki Sakoda
Tomoya Yamaura

Assignees

Sony Group Corporation

Dates

Publication Date: 20260512
Application Date: 20231129
Priority Date: 20140711

Claims (20)

1 . An information processing device, comprising: processing circuitry configured to control wireless communication circuitry of the information processing device, wherein the information processing device is a first wireless communication device, to receive a wireless signal having backward compatibility and including address fields; and upon detecting a frame check sequence (FCS) up to a media access control (MAC) header in the wireless signal, in a case where there is no error in data of the MAC header in the wireless signal, stop reception of the wireless signal based on first information of the address fields, which are included in the MAC header of the wireless signal; and change a carrier sense level for transmission in a case where second information of the address fields of the wireless signal of which the reception is stopped is not for a second wireless communication device to which the first wireless communication device is connected.
2 . The information processing device according to claim 1 , wherein the wireless signal includes an aggregated MAC protocol data unit, and the MAC header is a MAC header of a A-MPDU subframe of the AMPDU.
3 . The information processing device according to claim 1 , wherein the processing circuitry is further configured to change the carrier sense level from a first value to a second value which is higher than the first value, in a case where the second information of the address fields of the wireless signal which the reception is stopped is not for a second wireless communication device to which the first wireless communication device is connected.
4 . The information processing device according to claim 1 , wherein the processing circuitry is further configured to change the carrier sense level from the second value to the first value after a predetermined period.
5 . The information processing device according to claim 1 , wherein the processing circuitry is further configured to discard the wireless signal which the reception is stopped.
6 . The information processing device according to claim 1 , wherein the processing circuitry is further configured to control the wireless communication circuitry to in a case that the change period is ongoing and a frame for which an acknowledgement is required is received during the change period, transmit the acknowledgement to a transmission source of the frame.
7 . The information processing device according to claim 3 , wherein the first value is −62 dBm, and the second value is −82 dBm.
8 . The information processing device according to claim 1 , wherein the first information is different from the second information.
9 . The information processing device according to claim 1 , wherein the first information is the same as the second information.
10 . The information processing device according to claim 1 , further comprising: an input device; a display device; and a first antenna.
11 . The information processing device according to claim 1 , further comprising: a speaker; an external connection interface for coupling a memory to the information processing device; a second antenna which is constituting a MIMO antenna with the first antenna element; and a power supply which supplies power to the processing circuitry, the external connection interface, the input device, the display device, the speaker, and the first and second antennas.
12 . The information processing device according to claim 10 , further comprising: a content player reproducing a content stored in an external storage medium and accessed through a storage medium interface.
13 . The information processing device according to claim 10 , wherein the display device is an LED lamp which displays operation status of the information processing device.
14 . The information processing device according to claim 1 , wherein the processing circuitry is further configured to: determine whether to transmit the wireless signal based on at least one of information from a base station, information from a wireless slave station, a length of the wireless signal, and whether transmission is performed in a bundle of a plurality of frequencies.
15 . The information processing device according to claim 1 , wherein the processing circuitry is further configured to set transmission suppression until a reception end timing of the wireless signal of which the reception is stopped.
16 . The information processing device according to claim 15 , wherein the processing circuitry is further configured to control the wireless communication circuitry to when the transmission suppression is set, transmit an acknowledgement in a case where a frame destined for the first wireless communication device is received, at least one frame among frames destined for the first wireless communication device is correctly receivable, and it is necessary to transmit the acknowledgement to a transmission source of the frame destined for the first wireless communication device.
17 . The information processing device according to claim 1 , wherein the processing circuitry is further configured to determine whether there is an error in the data of the MAC header of the wireless signal based on a comparison result between the FCS and a checksum calculated based on the MAC header.
18 . The information processing device according to claim 1 , wherein the first information of the address fields includes at least one of a transmission address indicating the transmission source or a received address indicating the transmission destination.
19 . An information processing method, comprising: receiving, by wireless communication circuitry of an information processing device, a wireless signal having backward compatibility and including address fields; upon detecting a frame check sequence (FCS) up to a media access control (MAC) header in the wireless signal, in a case where there is no error in data of the MAC header in the wireless signal, stopping, by the wireless communication circuitry, reception of the wireless signal based on first information of the address fields, which are included in the MAC header of the wireless signal; and changing, by processing circuitry, a carrier sense level for transmission in a case where second information of the address fields of the wireless signal of which the reception is stopped is not for a second wireless communication device to which the first wireless communication device is connected.
20 . A non-transitory computer readable medium including executable instructions, which when executed by an information processing device cause the information processing device to execute an information processing method, the method comprising: receiving, by wireless communication circuitry of the information processing device, a wireless signal having backward compatibility and including address fields; upon detecting a frame check sequence (FCS) up to a media access control (MAC) header in the wireless signal, in a case where there is no error in data of the MAC header in the wireless signal, stopping, by the wireless communication circuitry, reception of the wireless signal based on first information of the address fields, which are included in the MAC header of the wireless signal; and changing, by processing circuitry of the information processing device a carrier sense level for transmission in a case where second information of the address fields of the wireless signal of which the reception is stopped is not for a second wireless communication device to which the first wireless communication device is connected.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS The present application is a continuation of U.S. application Ser. No. 17/560,310, filed Dec. 23, 2021, which is a continuation of U.S. application Ser. No. 16/775,284, filed Jan. 29, 2020 (now U.S. Pat. No. 11,228,944), which is a continuation of U.S. application Ser. No. 15/315,014, filed Nov. 30, 2016 (now U.S. Pat. No. 10,582,423), which is based on PCT filing PCT/JP2015/065747, filed Jun. 1, 2015, which claims priority to JP 2014-142951, filed Jul. 11, 2014, the entire contents of each are incorporated herein by reference. TECHNICAL FIELD The present technology relates to an information processing device. Particularly, the present technology relates to an information processing device, a communication system, and an information processing method of exchanging information using wireless communication. BACKGROUND ART In the related art, there are wireless communication technologies for exchanging information using wireless communication. For example, communication methods of exchanging information between information processing devices using wireless LANs have been proposed. In this way, when wireless communication is performed, error detection methods of detecting whether there are errors in data of received frames using frame check sequences (FCSs) have been proposed. When errors are detected in received frames in accordance with error detection methods, the frames are discarded. Conversely, when errors are not detected in received frames, media access control (MAC) headers are read to determine whether the frames are destined for own information processing devices. When the frames are not destined for the own information processing devices, the received frames are discarded despite the fact that content of the frames are correct. In the error detection methods, it is necessary to demodulate up to all the last ends of the frames in addition to the MAC headers and compare checksums generated from values of the demodulated frames to the FCSs. Therefore, after the frames are received to the last, it is determined that there are errors in the data. Therefore, for example, when there are errors in time points of the MAC headers or when frames are not destined for own information processing devices despite the fact that there are no errors in the time points of the MAC headers, this determination may not be performed before the frames are all received. Accordingly, for example, wireless packet communication systems in which fields for storing error detection codes for headers of packets are newly provided at the ends of the headers of the packets for protocols of upper layers of the physical layers have been proposed (for example, see Patent Literature 1). CITATION LIST Patent Literature Patent Literature 1: JP 2000-261462A DISCLOSURE OF INVENTION Technical Problem In the technologies of the related art described above, address and control information in headers is inspected by protocols of higher layers of the physical layer. When it is confirmed that the headers are invalid, when it is confirmed that the address and control information is valid according to error detection codes and there are no addresses destined for own information processing devices, or when control information is not control information which can be received by own information processing devices, an instruction to stop the reception is transmitted to the physical layer. However, in the technologies of the related art described above, there is a concern that wireless communication devices which are not capable of recognizing the fields newly provided to store the error detection codes may not correctly demodulate received frames. Accordingly, it is important to appropriately stop receiving the frames which are being received in consideration of backward compatibility. It is desirable to provide the present technology for appropriately stopping reception of a frame. Solution to Problem The present technology has been made to solve the above problem. A first aspect of the present technology is an information processing method, a program causing a computer to execute the method, and an information processing device including a control unit configured to perform control in a manner that a signal having backward compatibility and serving as an index by which another information processing device receiving a frame stops the reception of the frame is transmitted to the other information processing device. Thus, it is possible to obtain an operational effect in which the signal (which is a signal having backward compatibility) serving as the index by which another information processing device receiving the frame stops the reception of the frame is transmitted to the other information processing device. According to the first aspect, the control unit may use, as the index, information which is based on a calculation result obtained using a MAC header. Thus, it is possible to obtain an operational effect i