WO2023112331A1 - 無線通信システム、無線通信方法および基地局 - Google Patents
無線通信システム、無線通信方法および基地局 Download PDFInfo
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- WO2023112331A1 WO2023112331A1 PCT/JP2021/046830 JP2021046830W WO2023112331A1 WO 2023112331 A1 WO2023112331 A1 WO 2023112331A1 JP 2021046830 W JP2021046830 W JP 2021046830W WO 2023112331 A1 WO2023112331 A1 WO 2023112331A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0866—Non-scheduled access, e.g. ALOHA using a dedicated channel for access
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
- H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/10—Access point devices adapted for operation in multiple networks, e.g. multi-mode access points
Definitions
- the present invention relates to a wireless communication system, wireless communication method and base station.
- IEEE802.11be wireless LAN
- a single device is equipped with a plurality of different wireless LAN interfaces, and a function of establishing a plurality of transmission paths is adopted.
- Non-Patent Document 1 Also, in IEEE802.11be, use of the 6 GHz band is under consideration.
- the multilink device uses existing frequency bands (e.g., 2.4 GHz band and 5 GHz band) in addition to the new frequency band being considered for use (e.g., 6 GHz band), only the existing frequency bands are used.
- existing frequency bands e.g., 2.4 GHz band and 5 GHz band
- 5 GHz band e.g., 5 GHz band
- 6 GHz band e.g., 6 GHz band
- An object of the present invention is to reduce the communication speed of the existing device when a multilink device that uses both a low frequency band and a high frequency band and an existing device that does not support multilink that uses the low frequency band coexist.
- An object of the present invention is to provide a wireless communication system, a wireless communication method, and a base station that can prevent this.
- a wireless communication system is capable of communication by both a first communication method using a first frequency band and a second communication method using a second frequency band higher than the first frequency band.
- a contention window value at the time of transmission in communication between the base station and the first radio terminal in the first communication scheme is set to It is characterized in that it is set to a value larger than a default value, which is a contention window value at the time of transmission in communication with the terminal.
- a wireless communication method communicates by both a first communication method using a first frequency band and a second communication method using a second frequency band higher than the first frequency band.
- a first wireless terminal capable of communicating with the first communication method
- the first wireless terminal and the second wireless terminal A wireless communication method for controlling a multi-link compatible base station that accommodates wireless terminals.
- a contention window value at the time of transmission in communication between the base station and the first wireless terminal in the first communication scheme is set to and setting a value larger than a default value, which is a contention window value at the time of transmission in communication with the terminal.
- the base station can communicate by both the first communication method using the first frequency band and the second communication method using the second frequency band higher than the first frequency band. and a second wireless terminal that supports communication in the first communication method but does not support communication in the second communication method. be.
- the base station sets a contention window value at the time of transmission in communication with the first wireless terminal in the first communication method to a contention window value at the time of transmission in communication with the second wireless terminal in the first communication method.
- the tension window value is set to a value larger than the default value.
- the communication speed of the existing device is reduced. can be prevented.
- FIG. 1 is a diagram showing a configuration example of a radio communication system according to Embodiment 1;
- FIG. 2 is a diagram showing a specific configuration example of a base station according to Embodiment 1;
- FIG. 2 is a diagram showing a specific configuration example of a control device that controls a base station according to Embodiment 1;
- FIG. 2 is a diagram illustrating an example hardware configuration of a control device that controls a base station according to Embodiment 1;
- FIG. 4 is a flow chart showing an operation example of the radio communication system according to Embodiment 1;
- FIG. 1 is a diagram showing the configuration of a radio communication system 10 according to Embodiment 1.
- wireless communication system 10 is connected to network 100 .
- the radio communication system 10 includes, for example, a first radio terminal 20, a second radio terminal 30a, a third radio terminal 30b, a base station 40a, a base station 40b, a control device 50a, a control device 50b, and a terminal device 110.
- the control device 50a is connected to the network 100, and performs wireless communication between the base station 40a and the first wireless terminal 20 and wireless communication between the base station 40a and the second wireless terminal 30a. It controls the base station 40a.
- the base station 40a is a multilink compatible device, a so-called multilink device.
- the base station 40a includes a device 80 serving as an AP (access point) for communication according to a first communication scheme (also referred to as scheme 1 in this specification) and a second communication scheme (in this specification, scheme 2). and a device 90 serving as an AP of the AP.
- the base station 40a performs radio communication with each of the first radio terminal 20 and the second radio terminal 30a under the control of the control device 50a.
- Method 1 and method 2 are, for example, wireless communication methods conforming to wireless LAN standards.
- Method 1 is, for example, a 5 GHz band wireless communication method in IEEE802.11.
- Method 2 is, for example, a 6 GHz band wireless communication method in IEEE802.11.
- a multi-link device can perform wireless communication by using method 1 and method 2 at the same time.
- the base station 40a may be configured integrally with the control device 50a. That is, the base station 40a may have each function that the control device 50a has.
- the first wireless terminal 20 is a multilink device.
- the first wireless terminal 20 is a wireless terminal compatible with multilink, and serves as an STA (station) that communicates with an AP of a base station.
- the first wireless terminal 20 has a device 60 compatible with scheme 1 and a device 70 compatible with scheme 2 .
- the device 60 supports the communication method (method 1) of the device 80 that the base station 40a has, and performs wireless communication with the device 80.
- the device 70 supports the communication method (method 2) of the device 90 that the base station 40a has, and performs wireless communication with the device 90 .
- the second wireless terminal 30a supports only method 1 of methods 1 and 2.
- the second wireless terminal 30a does not support communication in Method 2.
- the second wireless terminal 30a is a so-called existing device that does not support multilink.
- the second wireless terminal 30a has a device 60 compatible with scheme 1, and serves as an STA that performs wireless communication with a device 80 that the base station 40a has.
- the control device 50b is connected to the terminal device 110.
- the control device 50b controls the first radio terminal 20, for example, so that the first radio terminal 20 and the base station 40a perform radio communication.
- the control device 50b may have substantially the same configuration as the control device 50a.
- the terminal device 110 is a computer or the like that controls the control device 50b.
- the first wireless terminal 20 may be configured integrally with the control device 50b. In other words, the first radio terminal 20 may have each function that the control device 50b has.
- the base station 40b has a device 80 that serves as a method 1 AP, and performs wireless communication with the third wireless terminal 30b.
- a third wireless terminal 30b is a wireless terminal having a device 60 that supports only method 1.
- FIG. The third wireless terminal 30b performs wireless communication in method 1 with the base station 40b.
- the wireless communication system 10 is capable of both a first communication scheme using a first frequency band (eg, 5 GHz) and a second communication scheme using a second frequency band (eg, 6 GHz) higher than the first frequency band.
- a first wireless terminal 20 capable of communicating according to the method, a second wireless terminal 30a supporting communication according to the first communication method but not compatible with communication according to the second communication method, the first wireless terminal 20 and A wireless communication system including a multi-link compatible base station 40a accommodating a second wireless terminal 30a.
- One or more first wireless terminals 20 may be accommodated in the base station 40a.
- one or more second wireless terminals 30a may be accommodated in the base station 40a.
- FIG. 2 is a diagram showing a specific configuration example of the base station 40a according to the first embodiment.
- the base station 40a has a radio section 41, a storage section 42, an interface (I/F) section 43 and a control section 44, for example.
- the wireless unit 41 includes the device 80 and the device 90 described above.
- the radio unit 41 performs radio communication with each of the radio terminals accommodated in the base station 40a, that is, the first radio terminal 20 and the second radio terminal 30a.
- the storage unit 42 stores information received by the base station 40 a via the radio unit 41 or the interface unit 43 .
- the interface unit 43 is a communication interface that communicates with the control device 50a.
- the control unit 44 controls each unit that configures the base station 40a.
- FIG. 3 is a diagram showing a specific configuration example of the control device 50a that controls the base station 40a according to the first embodiment.
- the control device 50a has a storage unit 51, an interface (I/F) unit 52, an interface (I/F) unit 53, and a control unit 56, for example.
- the storage unit 51 is a storage device that stores data within the control device 50a.
- the interface unit 52 is a communication interface that communicates with the base station 40a.
- the interface unit 53 is a communication interface that communicates with the network 100 .
- the control unit 56 controls wireless communication by the base station 40a, which is a multilink device, by controlling each unit that configures the control device 50a.
- the control unit 56 controls the contention window (CW) value at the time of transmission in communication between the base station 40a and the first wireless terminal 20.
- CW contention window
- the contention window value at the time of transmission in communication between the base station 40a and the second wireless terminal 30a in Method 1 is set as the default value.
- the contention window value at the time of transmission in communication between the base station 40b and the third wireless terminal 30b also becomes this default value.
- the control unit 56 sets the transmission contention window value in the communication between the base station 40a and the first wireless terminal 20 in method 1 to a value larger than the default value.
- the control unit 56 has a function of determining whether the communication is MLD communication.
- the control unit 56 determines that the communication in method 1 by the base station 40a is the MLD communication, that is, when the communication target of the base station 40a is the first wireless terminal 20, the contention window value is set to Set to a value greater than
- the control unit 56 determines that the communication in method 1 by the base station 40a is not the MLD communication, that is, when the communication target of the base station 40a is the second wireless terminal 30a
- the contention window value is set to the default value. set to
- each function of the control device 50a may be configured partially or entirely by hardware such as PLD (Programmable Logic Device) or FPGA (Field Programmable Gate Array), or may be executed by a processor such as a CPU. It may be configured as a program.
- hardware such as PLD (Programmable Logic Device) or FPGA (Field Programmable Gate Array)
- FPGA Field Programmable Gate Array
- control device 50a can be implemented using a computer and a program, and the program can be recorded on a storage medium or provided through a network.
- FIG. 4 is a diagram showing a hardware configuration example of the control device 50a that controls the base station 40a according to the first embodiment.
- the control device 50a has an input section 500, an output section 510, a communication section 520, a CPU 530, a memory 540, and an HDD 550 connected via a bus 560, and functions as a computer. Further, the control device 50a is configured to be able to input/output data to/from a computer-readable storage medium 570 .
- the input unit 500 is, for example, a keyboard and a mouse.
- the output unit 510 is, for example, a display device such as a display.
- the communication unit 520 is, for example, a network interface.
- the CPU 530 controls each unit that constitutes the control device 50a and performs predetermined processing.
- the memory 540 and HDD 550 are storage units that store data and the like.
- the storage medium 570 is capable of storing programs and the like for executing the functions of the control device 50a. Note that the architecture constituting the control device 50a is not limited to the example shown in FIG.
- control device 50b may have substantially the same configuration as the control device 50a.
- the control device 50b may set the transmission contention window value in the communication between the base station 40a and the first wireless terminal 20 in Method 1 to a value larger than the default value.
- the control device 50b may set the contention window value to a default value when communication is not MLD communication, such as when the communication target of the first wireless terminal 20 is the base station 40b.
- FIG. 5 is a flow chart showing an operation example of the radio communication system 10 according to the first embodiment.
- the flowchart of FIG. 5 shows an example of the control operation of the contention window value when the base station 40a communicates with the device 80 in method 1.
- the communication is MLD communication (step S101). If it is not MLD communication, the contention window value is set to a default value (step S102).
- the existing first frequency band is not affected during multilink. may be detected. That is, it may be detected and determined whether or not the BSS identifier (BSS color) of the received frame in the communication between the base station 40a and the first wireless terminal 20 in method 1 matches its own BSS (step S103).
- BSS color BSS identifier
- the contention window value may be set to the default value (step S102) so as not to affect the existing first frequency band. If the BSS identifier of the received frame matches the own BSS, the existing first frequency band is affected, so the contention window value is set larger than the default value (step S104).
- the SR function is realized, for example, by the SR control unit 55 provided in the control device 50a.
- the SR control unit 55 functions, for example, as a determination unit having the determination function of step S103 described above.
- the control unit 56 controls the value of the contention window value according to the determination result of the SR control unit 55 functioning as a determination unit.
- the wireless communication system 10 sets the contention window value at the time of transmission in communication between the base station 40a and the first wireless terminal 20 in the first communication scheme to It is configured to be set to a value larger than a default value, which is a contention window value during transmission in communication between the base station 40a and the second wireless terminal 30a.
- the waiting time at the time of transmission in wireless communication is determined according to the contention window value.
- the second radio terminal 30a which is an existing device that does not support multilink, has priority over the first radio terminal 20, which is a multilink device. can get rights. This makes it possible to improve the total throughput of the second wireless terminal 30a, which is an existing device that does not support multilink.
- the communication speed of the existing device is can be prevented from declining.
- each function of the wireless communication system 10 and each component of the wireless communication system 10, such as the base station 40a can also be implemented as a wireless communication method including each function as a process.
- Radio communication system 20 first radio terminal 30a second radio terminal 30b third radio terminal 40a base station 40b base station 41 radio section 42 storage section 43 interface section 44 control section 50a control device 50b control device 51 storage section 52 interface section 53 Interface unit 55 SR control unit 56 Control unit 60 Device 70 Device 80 Device 90 Device 100 Network 110 Terminal device 500 Input unit 510 Output unit 520 Communication unit 530 CPU 540 memory 550 HDD 560 bus 570 storage medium
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Abstract
Description
図1は、実施の形態1による無線通信システム10の構成を示す図である。図1に示すように、無線通信システム10は、ネットワーク100に接続されている。無線通信システム10は、例えば、第1無線端末20、第2無線端末30a、第3無線端末30b、基地局40a、基地局40b、制御装置50a、制御装置50bおよび端末装置110を備えている。
20 第1無線端末
30a 第2無線端末
30b 第3無線端末
40a 基地局
40b 基地局
41 無線部
42 記憶部
43 インターフェース部
44 制御部
50a 制御装置
50b 制御装置
51 記憶部
52 インターフェース部
53 インターフェース部
55 SR制御部
56 制御部
60 デバイス
70 デバイス
80 デバイス
90 デバイス
100 ネットワーク
110 端末装置
500 入力部
510 出力部
520 通信部
530 CPU
540 メモリ
550 HDD
560 バス
570 記憶媒体
Claims (8)
- 第1周波数帯を用いる第1通信方式と当該第1周波数帯よりも高い第2周波数帯を用いる第2通信方式との両方式により通信可能である第1無線端末と、前記第1通信方式での通信に対応して前記第2通信方式での通信には非対応である第2無線端末と、前記第1無線端末および前記第2無線端末を収容するマルチリンク対応の基地局と、
を備える無線通信システムにおいて、
前記第1通信方式での前記基地局と前記第1無線端末との通信における送信時のコンテンションウィンドウ値を、前記第1通信方式での前記基地局と前記第2無線端末との通信における送信時のコンテンションウィンドウ値である既定値より大きい値に設定することを特徴とする無線通信システム。 - 前記第1通信方式および前記第2通信方式は、無線LANの規格に準拠した無線通信方式であることを特徴とする請求項1に記載の無線通信システム。
- 前記第1通信方式での前記基地局と前記第1無線端末との通信における受信フレームのBSS識別子が自BSSと一致する場合には、当該通信における送信時のコンテンションウィンドウ値を前記既定値より大きい値に設定し、
前記第1通信方式での前記基地局と前記第1無線端末との通信における受信フレームのBSS識別子が自BSSと異なる場合には、当該通信における送信時のコンテンションウィンドウ値を前記既定値に設定することを特徴とする請求項1または請求項2に記載の無線通信システム。 - 第1周波数帯を用いる第1通信方式と当該第1周波数帯よりも高い第2周波数帯を用いる第2通信方式との両方式により通信可能である第1無線端末と、前記第1通信方式での通信に対応して前記第2通信方式での通信には非対応である第2無線端末と、前記第1無線端末および前記第2無線端末を収容するマルチリンク対応の基地局と、
を制御する無線通信方法において、
前記第1通信方式での前記基地局と前記第1無線端末との通信における送信時のコンテンションウィンドウ値を、前記第1通信方式での前記基地局と前記第2無線端末との通信における送信時のコンテンションウィンドウ値である既定値より大きい値に設定する工程、
を含むことを特徴とする無線通信方法。 - 前記第1通信方式および前記第2通信方式は、無線LANの規格に準拠した無線通信方式であることを特徴とする請求項4に記載の無線通信方法。
- 前記第1通信方式での前記基地局と前記第1無線端末との通信における受信フレームのBSS識別子が自BSSと一致する場合には、当該通信における送信時のコンテンションウィンドウ値を前記既定値より大きい値に設定する工程と、
前記第1通信方式での前記基地局と前記第1無線端末との通信における受信フレームのBSS識別子が自BSSと異なる場合には、当該通信における送信時のコンテンションウィンドウ値を前記既定値に設定する工程と、
を含むことを特徴とする請求項4または請求項5に記載の無線通信方法。 - 第1周波数帯を用いる第1通信方式と当該第1周波数帯よりも高い第2周波数帯を用いる第2通信方式との両方式により通信可能である第1無線端末と、前記第1通信方式での通信に対応して前記第2通信方式での通信には非対応である第2無線端末と、
を収容するマルチリンク対応の基地局において、
前記第1通信方式での前記第1無線端末との通信における送信時のコンテンションウィンドウ値を、前記第1通信方式での前記第2無線端末との通信における送信時のコンテンションウィンドウ値である既定値より大きい値に設定することを特徴とする基地局。 - 前記第1通信方式及び前記第2通信方式は、無線LANの規格に準拠した無線通信方式であることを特徴とする請求項7に記載の基地局。
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| US18/713,341 US20250016827A1 (en) | 2021-12-17 | 2021-12-17 | Wireless communication system, wireless communication method, and base station |
| JP2023567499A JP7716630B2 (ja) | 2021-12-17 | 2021-12-17 | 無線通信システム、無線通信方法および基地局 |
| PCT/JP2021/046830 WO2023112331A1 (ja) | 2021-12-17 | 2021-12-17 | 無線通信システム、無線通信方法および基地局 |
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2021
- 2021-12-17 US US18/713,341 patent/US20250016827A1/en active Pending
- 2021-12-17 WO PCT/JP2021/046830 patent/WO2023112331A1/ja not_active Ceased
- 2021-12-17 JP JP2023567499A patent/JP7716630B2/ja active Active
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| JP2018500814A (ja) * | 2014-12-02 | 2018-01-11 | エルジー エレクトロニクス インコーポレイティド | 無線lanシステムにおける広帯域フレームのリソース割当て方法及びそのための装置 |
| US20170373736A1 (en) * | 2016-06-23 | 2017-12-28 | Zte Corporation | Integrated ofdma and edca channel access mechanism |
| JP2018074540A (ja) * | 2016-11-04 | 2018-05-10 | 株式会社国際電気通信基礎技術研究所 | 無線通信装置および無線通信方法 |
| US20210168868A1 (en) * | 2018-08-10 | 2021-06-03 | Lg Electronics Inc. | Method and apparatus for transmitting ppdu in wlan system |
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| SANGHYUN KIM (WILUS): "Contention Window Value Management for STR MLD", IEEE DRAFT; 11-20-1156-01-00BE-CONTENTION-WINDOW-VALUE-MANAGEMENT-FOR-STR-MLD, IEEE-SA MENTOR, PISCATAWAY, NJ USA, vol. 802.11 EHT; 802.11be, no. 1, 4 November 2020 (2020-11-04), Piscataway, NJ USA , pages 1 - 8, XP068174917 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20250016827A1 (en) | 2025-01-09 |
| JPWO2023112331A1 (ja) | 2023-06-22 |
| JP7716630B2 (ja) | 2025-08-01 |
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