JP-7856197-B2 - Communication control device and communication control method

Inventors

• 菅谷 茂
• 相尾 浩介
• 田中 悠介

Assignees

• ソニーグループ株式会社

Dates

Publication Date

20260511

Application Date

20250515

Priority Date

20190124

Claims (20)

1. The third wireless communication device includes a control unit that controls a communication unit so as to receive a first signal containing first information relating to a signal to be wirelessly transmitted to a second wireless communication device in cooperation with a first wireless communication device. The control unit controls the communication unit to transmit a second signal containing information indicating the second wireless communication device, in response to receiving the first signal . Communication control device.
2. The first information includes data to be wirelessly transmitted to the second wireless communication device in cooperation with the first wireless communication device . The communication control device according to claim 1.
3. The control unit controls the communication unit to wirelessly transmit the second signal to the first wireless communication device. The communication control device according to claim 2 .
4. The transmission time of the third signal, which is transmitted from the first wireless communication device and includes the data, and the transmission time of the fourth signal, which is transmitted from the third wireless communication device and includes the data, overlap at least partially. The communication control device according to claim 3 .
5. The third signal and the fourth signal are transmitted simultaneously to the second wireless communication device. The communication control device according to claim 4 .
6. The second signal includes information on communication parameters used when the first wireless communication device and the third wireless communication device cooperate to transmit the data. The communication control device according to claim 4 .
7. The communication parameter information includes information regarding the Modulation and Coding Scheme (MCS) and information regarding the transmission power . The communication control device according to claim 6 .
8. The third signal and the fourth signal are transmitted in response to the reception of the fifth signal. The fifth signal includes information indicating that coordinated transmission will be performed. The communication control device according to claim 4 .
9. The fifth signal includes information indicating the transmission power of the third signal and information indicating the transmission power of the fourth signal. The communication control device according to claim 8.
10. The fifth signal includes information indicating the Modulation and Coding Scheme (MCS) of the third signal and information indicating the MCS of the fourth signal. The communication control device according to claim 9 .
11. The fourth signal includes information for identifying that a coordinated transmission operation is being performed . The communication control device according to claim 4 .
12. The first signal includes information indicating a fourth wireless communication device that, in cooperation with the first wireless communication device and the third wireless communication device, transmits the data to the second wireless communication device. The communication control device according to claim 4 .
13. The interval between the second signal and the fourth signal is a predetermined interval. The communication control device according to claim 4 .
14. The control unit controls the communication unit to transmit the fourth signal by multiplexing it with the sixth signal transmitted to the fifth wireless communication device . The communication control device according to claim 4 .
15. The second signal includes at least one of the following: information regarding the number of multiple transmissions when transmitting the data with the fourth signal, and communication parameters when transmitting the data. The communication control device according to claim 4 .
16. The information indicating the second wireless communication device is information indicating the address of the second wireless communication device. The communication control device according to claim 1 .
17. The control unit controls the communication unit to receive the first signal from the first wireless communication device and transmit the second signal to the first wireless communication device. The communication control device according to claim 1.
18. The control unit controls the communication unit to receive the first signal from the sixth wireless communication device and transmit the second signal to the sixth wireless communication device. The communication control device according to claim 1 .
19. The information indicating that the aforementioned coordinated transmission will be performed is common information for multiple wireless communication devices that will receive the data. The communication control device according to claim 8.
20. The fifth signal includes information indicating parameters for coordinating the transmission of the data. The communication control device according to claim 8.

Description

The technologies disclosed herein relate to communication devices and communication methods for transmitting and receiving wireless signals. The Multiple Input Multiple Output (MIMO) method, which uses spatial division multiplexing to wirelessly transmit multiple data streams, is already in practical use. By utilizing this MIMO technology, data can be simultaneously transmitted from, for example, a single source communication device acting as an access point to multiple receiving communication devices acting as communication terminals. Specifically, when an access point is equipped with multiple antenna modules and a communication terminal consists of a single antenna module, using downlink MIMO technology can increase the transmission capacity of the downlink. On the other hand, technologies that enable communication while avoiding interference between adjacent access points by having multiple access points operate in coordination are also being put into practical use. Recently, multipoint coordinated transmission technology has been developed, which simultaneously transmits data from multiple access points to a single receiving communication device, and the receiving device obtains the data that was successfully received. For example, in a system where access points are connected via wired LAN (Local Area Network) such as Ethernet (registered trademark) or other communication means and pre-synchronized, a method can be conceivable in which access points cooperate to perform data transmission. Furthermore, a wireless communication device has been proposed that manages multiple groups and implements scheduled access for each group (see, for example, Patent Document 1). Japanese Patent Publication No. 2017-85656 Figure 1 shows an example of a wireless network configuration.Figure 2 shows another example of a wireless network configuration.Figure 3 illustrates the process of data sharing and coordinated data transmission between multiple access points.Figure 4 illustrates the process of data sharing and coordinated data transmission between multiple access points.Figure 5 shows an example of a communication sequence used to verify the operation of coordinated transmission.Figure 6 shows an example of a communication sequence used to verify the operation of coordinated transmission.Figure 7 shows an example of the configuration of an association frame.Figure 8 shows an example of a collaborative frame configuration.Figure 9 shows an example of the configuration of an Initiate Frame.Figure 10 shows an example of a Grant Frame configuration.Figure 11 shows an example of the configuration of a trigger frame.Figure 12 shows the internal structure of the data frame.Figure 13 shows an example of a data frame structure.Figure 14 shows an example of a data frame structure.Figure 15 shows an example of a data frame structure.Figure 16 shows an example of a data frame structure.Figure 17 shows an example of a data frame structure.Figure 18 shows an example of a data frame structure.Figure 19 shows an example of a data frame structure.Figure 20 is a schematic diagram showing an example of the functional configuration of the communication device 2000.Figure 21 shows an example of the internal configuration of the wireless communication module 2005.Figure 22 is a flowchart showing the processing procedure for an access point to register a communication terminal.Figure 23 is a flowchart showing the processing procedure for an access point to register an adjacent access point.Figure 24 is a flowchart showing the processing procedure when an access point receives transmitted data.Figure 25 is a flowchart showing the processing procedure for an access point to actively perform coordinated transmission.Figure 26 is a flowchart showing the processing steps for an access point to passively perform coordinated transmission.Figure 27 is a flowchart showing the processing procedure for a communication terminal to receive coordinated transmission data from multiple access points. The embodiments of the technology disclosed herein will be described in detail below with reference to the drawings. This specification proposes a technology for optimizing data sharing and coordinated transmission between multiple access points. Specifically, it proposes a technology that optimizes data sharing and coordinated transmission by pre-sharing data to be transmitted coordinately between adjacent access points, specifying the communication devices to be transmitted coordinately in a grant frame that notifies the access points of successful sharing, and then notifying them in advance that coordinated transmission will be performed at a later time. Furthermore, this specification proposes a technology for efficiently utilizing wireless transmission paths when an access point performs coordinated transmission. This technology involves multiplexing data destined for other communication devices, not just one, using multi-user spatial division multiplex