JP6527400B2 - Communications system - Google Patents

Description

  The present invention relates to a communication system having control means for controlling a band of a wireless LAN (Local Area Network).

  In recent years, wireless LAN communication systems as shown in FIG. 1 have become widespread. Data transmitted from a certain wireless LAN terminal (STA) 22 to the communication partner 40 is transmitted via an AP (Access Point) 21 of a wireless LAN NW (wireless LAN network) to which the STA 22 belongs and one or more relay devices 10, The communication partner 40 is reached. The data sent from the correspondent 40 to one of the STAs 22 follows the reverse order and arrives at that STA.

  Non-Patent Document 1 defines an access control method such as, for example, a carrier sense multiple access / collision avoidance (CSMA / CA) method in order to avoid collision of wireless data signals in a wireless LAN NW. In the CSMA / CA scheme, each STA confirms the use status of the wireless channel by carrier sense, transmits when the wireless channel is idle, and transmits only IFS (Inter Frame Space) time + backoff time when busy. Avoid collisions by foreclosure. The CSMA / CA scheme provides transmission opportunities equally to each STA by randomly setting the backoff time of each STA. The AP can acquire a transmission opportunity if it starts data transmission within the minimum waiting time (IFS time) of the STA after the wireless channel becomes idle.

  FIG. 2 shows a transition example of the use band of AP, STA1 and STA2 when the CSMA / CA method is applied. BWmax represents the total amount of wireless bands of the corresponding wireless LAN NW. It is assumed that STA1 has no data to be transmitted in period t1 and STA2 has no data to be transmitted in period t4. STA1 and STA2 transmit the same amount of data for each transmission opportunity, and assuming that they have the same transmission rate, each STA equally uses the upstream band, as shown in the period t2 to t3. For example, in the period t2, the STA1 and the STA2 use 60 Mbps, which can be used as the upstream band, at 30 Mbps fairly.

IEEE Std. 802.11-2012

  The wireless band in the wireless LAN NW is shared by uplink communication from each STA to the AP and downlink communication from the AP to each STA. Therefore, when evaluating the use band of each STA in the wireless LAN NW, both the uplink use band and the downlink use band should be considered.

  FIG. 3 rearranges the transition of the use band shown in FIG. 2 from the viewpoint of the transmitting device and the receiving device. For example, as shown by the dotted line, it is assumed that the purpose is to allocate bandwidths of 50 Mbps to STA1 and STA2. When the transmission use band (uplink use band) and the reception use band (downlink use band) are summed, STA2 always uses more band than STA1. For example, in period t1, STA1 uses 30 Mbps for transmission and reception, while STA2 uses 70 Mbps for transmission and reception.

  However, since the CSMA / CA scheme can only equally distribute transmission opportunities (uplink bandwidth usage opportunities) to STAs, it is difficult to fairly allocate the bandwidth of the wireless LAN NW to each STA as shown in FIG. Have the task of

  Therefore, in order to solve the above problems, the present invention aims to provide a communication system that controls the bandwidth of each STA included in the wireless LAN NW, considering both the upstream usage bandwidth and the downstream usage bandwidth of each STA. I assume.

  In order to achieve the above object, the communication system according to the present invention determines a set S of STAs to be controlled based on information on the weighted total value of the uplink use band and the downlink use band of each STA, and sets the set S. An instruction is issued to the communication relay unit to perform bandwidth control on S.

Specifically, the band control method of the communication system according to the present invention is a band control method of controlling the bands of a plurality of wireless LAN stations (STAs) communicating with an access point (AP) of one wireless LAN network, ,
Among the STAs, a determination procedure of determining STAs whose values relating to a use band match a predetermined determination condition as a set S of control target STAs;
An instruction procedure for instructing a STA belonging to the set S to perform predetermined band control;
It is characterized by doing.

  It detects a STA with a large used band including uplink and downlink, and controls the STA to limit the band. Therefore, in the bandwidth control method, since the STA2 in the periods t1, t2 and t4 in FIG. 3 is detected and the bandwidth of the STA2 is controlled, the bandwidth can be equally distributed between the ONU1 and ONU2 as shown in FIG. . Therefore, the present invention can provide a communication system that controls the band of each STA included in the wireless LAN NW in consideration of both the uplink use band and the downlink use band of each STA.

  In the bandwidth control method of the communication system according to the present invention, the value relating to the used bandwidth used for the determination in the determination procedure is the total value of the uplink used bandwidth and the downlink used bandwidth, the uplink used bandwidth and the downlink used It is characterized in that it is a total value of the bands or a value obtained by dividing the total value by the transmission rate of the STA to be determined.

  The bandwidth control method of the communication system according to the present invention is characterized in that the determination condition in the determination procedure is set for each STA.

  The bandwidth control method of the communication system according to the present invention is characterized in that the determination condition in the determination procedure is set according to a bandwidth utilization rate of the wireless LAN network.

In the band control method of the communication system according to the present invention, the predetermined band control instructed in the instruction procedure is:
Priority control for preferentially allocating a bandwidth to STAs not belonging to the set S,
Delay control for adding a delay to a signal addressed to an STA belonging to a set S or a signal whose source is an STA belonging to the set S;
Discard control for discarding a signal addressed to an STA belonging to the set S or a signal whose source is an STA belonging to the set S,
Alternatively, it is characterized in that it is at least two combinations of the priority control, the delay control and the discard control.

  There are the following three configurations of the communication system which can realize the above-mentioned band control method.

A communication system according to the present invention is a communication system including an AP of one wireless LAN network that communicates with a plurality of STAs,
The AP is
A band control unit having a determination unit performing the determination procedure of the band control method, and an instruction unit performing the instruction procedure;
A communication relay unit for notifying the bandwidth control unit of a value relating to a used bandwidth and controlling a bandwidth between STAs belonging to the set S based on the predetermined bandwidth control instruction from the bandwidth control unit;
And the like.

The communication system according to the present invention includes an AP of one wireless LAN network that communicates with a plurality of STAs, and a relay apparatus that relays data from the AP to the communication partner of the STA and data from the communication partner to the AP. A communication system including
The relay device is
A band control unit having a determination unit performing the determination procedure of the band control method, and an instruction unit performing the instruction procedure;
A communication relay unit for notifying the bandwidth control unit of a value relating to a used bandwidth and controlling a bandwidth between STAs belonging to the set S based on the predetermined bandwidth control instruction from the bandwidth control unit;
And the like.

The communication system according to the present invention includes an AP of one wireless LAN network that communicates with a plurality of STAs, and a relay apparatus that relays data from the AP to the communication partner of the STA and data from the communication partner to the AP. A communication system including
The relay device is
A bandwidth control unit having a determination unit that performs the determination procedure of the bandwidth control method;
A first communication relay unit that notifies the bandwidth control unit of a value related to the used bandwidth, receives information of STAs belonging to the set S from the bandwidth control unit, and notifies the AP that the STA belongs to the set S And
The AP is
A band control unit having an instruction unit that performs the instruction procedure of the band control method;
And a second communication relay unit configured to control a band between STAs belonging to the set S based on the predetermined band control instruction from the band control unit.

  The band control method can be realized by configuring the communication system as such. Therefore, the present invention can provide a communication system that controls the band of each STA included in the wireless LAN NW in consideration of both the uplink use band and the downlink use band of each STA.

  The present invention can provide a communication system that controls the band of each STA included in the wireless LAN NW in consideration of both the uplink use band and the downlink use band of each STA.

It is a figure explaining the composition of the communication system relevant to the present invention. It is a figure explaining the use zone | band in the wireless LAN NW area of the communication system relevant to this invention. It is a figure explaining the subject of the communication system relevant to the present invention. It is a figure explaining the use zone | band in an ideal wireless LAN NW area. It is a figure explaining the composition of the communications system concerning the present invention. It is a flowchart explaining the zone | band control method of the communication system which concerns on this invention. It is a flowchart explaining the zone | band control method of the communication system which concerns on this invention. It is a flowchart explaining the zone | band control method of the communication system which concerns on this invention. It is a flowchart explaining the zone | band control method of the communication system which concerns on this invention. It is a figure explaining the composition of the communications system concerning the present invention. It is a figure explaining the composition of the communications system concerning the present invention. It is a figure explaining the composition of the communications system concerning the present invention.

  Embodiments of the invention will be described with reference to the accompanying drawings. The embodiments described below are embodiments of the present invention, and the present invention is not limited to the following embodiments. In the present specification and drawings, components having the same reference numerals denote the same components.

(Embodiment 1)
FIG. 5 is a diagram for explaining the configuration of the communication system 301 of the present embodiment. The communication system 301 includes the AP 21 a of the wireless LAN NW and the relay device 10. Although only one STA 22 is connected to the AP 21a in FIG. 5 for explanation, a plurality of STAs are actually connected to one AP 21a as shown in FIG. The present embodiment is an example in which the AP 21a executes band control with the STA 22 in the state as shown in FIG.

  The AP 21 a includes a communication relay unit 51 and a band control unit 52. The communication relay unit 51 relays communication between the band control unit 52, the STA 22 connected to the AP 21a, and the relay apparatus 10 connected to the AP 21a. The band control unit 52 executes a band control method. The band control unit 52 includes an interface unit 53, a determination unit 54, and an instruction unit 55. The interface unit 53 relays the communication between the communication relay unit 51 and the determination unit 54 and the communication between the communication relay unit 51 and the instruction unit 55. The determination unit 54 and the instruction unit 55 respectively execute a determination procedure and an instruction procedure described later.

The band control method according to the present embodiment is a band control method for controlling the bands of a plurality of wireless LAN stations (STAs) communicating with an access point (AP) of one wireless LAN network,
Among the STAs, a determination procedure of determining STAs whose values relating to a use band match a predetermined determination condition as a set S of control target STAs;
An instruction procedure for instructing a STA belonging to the set S to perform predetermined band control;
It is characterized by doing.

  The determination unit 54 calculates the use band of the STA based on at least one of the number of signals transmitted / received by at least one STA, the signal length, the header information, and the channel transmission rate, and based on a predetermined determination condition. The STA set S to be controlled is determined. Here, the signal indicates a data unit relayed by the communication relay unit 51. For example, Ethernet (registered trademark) frames, IP packets, TCP segments, UDP segments, etc. can be considered, but other data units may be used.

  Further, as a method of calculating the use band of the STA, for example, a method of calculating the sum of the signal lengths of all signals relayed by the communication relay unit during a predetermined period and having the corresponding STA as a transmission source or destination can be considered. . Further, any other method may be used as long as the calculation is performed based on at least one of the number of signals transmitted and received by the STA, the signal length, the header information, and the channel transmission rate.

  As an example of the determination condition, the condition that “the corresponding STA is included in the set S if the sum of the uplink use band and the downlink use band of a certain STA exceeds a certain value” can be considered. Also, the uplink use band and the downlink use band of the STA may be weighted, and the set S may be determined based on the total value thereof. For example, by using not the simple sum value of the uplink use band and the downlink use band but the sum value obtained by weighting the downlink use band as the determination condition, the downlink use band having a relatively large amount of traffic compared to the uplink signal The determination of the set S can be made with emphasis on Further, when there is no STA satisfying the determination condition, the set S may be an empty set.

Based on the determination result of determination unit 54, instruction unit 55 instructs the communication relay unit to perform band control on the STAs belonging to control target set S. The predetermined band control instructed in the instruction procedure is
Priority control for preferentially allocating a bandwidth to STAs not belonging to the set S,
Delay control for adding a delay to a signal addressed to an STA belonging to a set S or a signal whose source is an STA belonging to the set S;
Discard control for discarding a signal addressed to an STA belonging to the set S or a signal whose source is an STA belonging to the set S,
Alternatively, it is at least two combination of the priority control, the delay control, and the discard control.

  The band control performed by the communication relay unit 51 is a method of explicitly granting the transmission right to the STA using a control signal (such as CTS (Clear to Send) or polling signal) that the AP 21a transmits to the STA 22, and a destination A method of adding a delay to a signal according to STA, a method of discarding a signal according to destination STA, a method of adding a delay to a signal according to a transmission source STA, and discarding a signal according to the transmission source STA Perform at least one of the methods. For example, as shown in FIG. 6, all STAs not included in S are sequentially designated for STAs in set S to transmit a CTS, or all STAs not included in S as shown in FIG. A method of sequentially transmitting signals addressed to, a method of transmitting signals from STAs not included in S in order as shown in FIG. 8, and a signal of addresses included in S as shown in FIG. 9 are discarded I can think of a method.

  Unless otherwise stated, the above-mentioned band control method is to be implemented also in the other embodiments.

  An operation example of the band control method in the use band of FIG. 3 will be shown below. In this example, the purpose is to evenly distribute the used upper and lower bandwidths in the wireless LAN NW to STA1 and STA2, and the determination unit “controls the corresponding STA if the total of the uplink used bandwidth and downlink used bandwidth of a certain STA exceeds 50 Mpbs. It is assumed that the determination condition “included in the target set S” is used. Also, the communication relay unit adds a delay to the downlink signal addressed to the STAs belonging to the control target set S, a method of sequentially granting the transmission right by the CTS to STAs not belonging to the control target set S based on the instruction of the instruction unit. It is assumed that the method is used for bandwidth control in combination.

  In the period t1, the STA1 is not included in the control target set S because the total value (30 Mbps) of the uplink use band (0 Mpbs) and the downlink use band (30 Mpbs) is less than 50 Mpbs. On the other hand, STA2 is included in the control target set S because the total value (70 Mbps) of the uplink use band (35 Mpbs) and the downlink use band (35 Mpbs) exceeds 50 Mpbs. Therefore, the control target set S = {STA2} is obtained as the determination result in the period t1.

  The communication relay unit suppresses the upstream band of the STA 2 by explicitly assigning the transmission right to the STAs (that is, STA1) that do not belong to the control target set S by the CTS. Further, the communication relay unit suppresses the downlink band of STA2 by adding a delay to the downlink signal addressed to the STA (that is, STA2) belonging to the control target set S1. As a result of the above band control, as shown in FIG. 4, the band is allocated fairly in period t1.

  On the other hand, in the period t3 in which the bandwidth is allocated fairly to each STA, there is no STA satisfying the determination condition, and the control target set S becomes an empty set, so bandwidth control is not performed.

  The following information is exchanged between each functional unit to execute the band control method. First, the communication relay unit 51 transmits at least one of the number of signals transmitted / received by at least one STA, the signal length, the header information, and the channel transmission rate to the determination unit 54 via the interface unit 53. The determination unit 54 transmits at least information on the control target set S to the instruction unit 55. The instruction unit 55 transmits information on a bandwidth control method (at least one of an explicit transmission right grant, delay addition, and signal discarding in the AP) to at least one STA to the communication relay unit 51 via the interface unit 53. Send.

Second Embodiment
FIG. 10 is a diagram for explaining the configuration of the communication system 302 according to this embodiment. The communication system 302 includes an AP 21 and a relay device 10a. Note that although only one STA is connected to the AP in FIG. 10 for the sake of explanation, a plurality of STAs are actually connected to one AP as shown in FIG. The present embodiment is an example in which the relay device 10 a executes the band control method of the communication system 302 in the state as illustrated in FIG. 3.

  The relay device 10 a includes a communication relay unit 61 and a band control unit 62. The communication relay unit 61 relays communication with the band control unit 62 and communication with the AP 21, a relay device other than itself, or the communication partner 40. The band control unit 62 includes an interface unit 63, a determination unit 64, and an instruction unit 65. The interface unit 63 relays the communication between the communication relay unit 61 and the determination unit 64 and the communication between the communication relay unit 61 and the instruction unit 65. The determination unit 64 and the instruction unit 65 execute the determination procedure and the instruction procedure described in the first embodiment, respectively.

A specific determination method of the present embodiment will be described.
The determination procedure of the determination unit 64 is the same as that of the first embodiment. On the other hand, the present embodiment differs from the first embodiment in that the instructing unit 65 instructs the communication relay unit 61 of the relay device 10a, the instructing unit 65 explicitly gives the STA 22 a transmission right by the control signal of the AP 21. Can not do how to do. Therefore, the bandwidth control performed by the communication relay unit 61 includes a method of adding a delay to the signal according to the destination STA, a method of discarding the signal according to the destination STA, and a delay to the signal according to the transmission source STA. And / or a method of discarding the signal depending on the source STA.

  The following information is exchanged between each functional unit to execute the band control method. First, the communication relay unit 61 transmits at least one of the number of signals transmitted / received by at least one STA, the signal length, the header information, and the channel transmission rate to the determination unit 64 via the interface unit 63. The determination unit 64 transmits at least information on the control target set S to the instruction unit 65. The instruction unit 65 transmits, to the communication relay unit 61 via the interface unit 64, information on the bandwidth control method (at least either delay addition or signal discard) for at least one STA.

  The communication system 302 has an advantage that the functions of the AP can be simplified by concentrating the functions required for the band control method in the relay apparatus with respect to the communication system 301 of FIG.

(Embodiment 3)
FIG. 11 is a diagram for explaining the configuration of the communication system 303 of this embodiment. The communication system 303 includes an AP 21 b and a relay device 10 b. Note that although only one STA is connected to the AP 21b in FIG. 11 for the sake of explanation, a plurality of STAs are actually connected to one AP as shown in FIG. The present embodiment is an example in which the relay device 10b performs the determination procedure in the state as illustrated in FIG. 3 and the AP 21b performs the instruction procedure to execute the band control method of the communication system 303.

  The AP 21 b includes a communication relay unit 51 and a band control unit 52 b. The communication relay unit 51 relays communication between the band control unit 52b, the STA 22 connected to the AP, and the relay device 10b connected to the AP. The band control unit 52 b includes an interface unit 53 and an instruction unit 55. The interface unit 53 relays the communication between the communication relay unit 51 and the instruction unit 55. The instruction unit 55 executes the instruction procedure described in the first embodiment.

  The relay device 10 b includes a communication relay unit 61 and a band control unit 62 b. The communication relay unit 61 relays communication with the band control unit 62 b and communication with the AP 21 b, a relay device other than itself, or the communication partner 40. The bandwidth control unit 62 b includes an interface unit 63 and a determination unit 64. The interface unit 63 relays the communication between the communication relay unit 61 and the determination unit 64. The determination unit 64 executes the determination procedure described in the first embodiment.

  The following information is exchanged between the functional units to execute the bandwidth control method. First, the communication relay unit 61 transmits at least one of the number of signals transmitted / received by at least one STA, the signal length, the header information, and the channel transmission rate to the determination unit 64 via the interface unit 63. The determination unit 64 transmits at least the information of the control target set S to the instruction unit 55 of the AP via the interface unit 63, the communication relay unit 61, the communication relay unit 51 of the AP, and the interface unit 53 of the AP. The instructing unit 55 transmits, to the communication relay unit 51 via the interface unit 53 of the AP, information on a bandwidth control method (at least either delay addition or signal discarding) for at least one STA.

  The communication system 303 transmits the determination result of the determination unit 64 of the relay apparatus 10b to the instruction unit 55 of the AP 21b with respect to the communication system 301 of FIG. 5 and the communication system 302 of FIG. It is necessary to exchange control signals between them. On the other hand, the communication system 303 has an advantage that the AP and the function can be simplified because the relay device 10b executes the determination procedure with respect to the communication system 301 of FIG. Further, the communication system 303 has an advantage that the transmission right can be explicitly given to the STA by the AP 21b performing an instruction procedure to the communication system 302 in FIG.

(Embodiment 4)
FIG. 12 is a diagram for explaining a communication system 304 of the present embodiment. The communication system 304 is a communication system in which the relay device is a PON (Passive Optical Network) 10c.

  The PON 10 c comprises one or more optical subscriber line network units (ONUs: Optical Network Unit) 11, a splitter 12, and an optical subscriber line termination unit (OLT: Optical Line Terminal) 15. The PON is a technology for achieving an economical network by splitting an optical signal by a low-cost passive element splitter and sharing one optical fiber connected to the OLT with one or more ONUs.

  The configuration of the determination unit and the instruction unit of the communication system 304 may be any of the configurations described in the first to third embodiments. For example, only the AP may execute the band control method as in the communication system 301 (FIG. 5) of the first embodiment, or the relay apparatus (communication system 304) as in the communication system 302 (FIG. 10) of the second embodiment. In this case, the ONU 11 or the OLT 15) may execute the band control method, and the relay apparatus (ONU or OLT in the communication system 304) executes the determination procedure as in the communication system 303 (FIG. 11) of the third embodiment. May execute the instruction procedure.

  The communication system 304 has an advantage that by using a PON system, a plurality of APs can share a single optical fiber and reduce the cost of network installation.

Embodiment 5
The present embodiment is an example in which determination conditions are set for each STA and priority control is performed. The priority control of the fifth embodiment can be applied to any of the communication systems of the first to fourth embodiments.

  For example, assuming that the priority STA set P, the threshold T1, and the threshold T2 (T1> T2), “for STAs belonging to the set P, if the weighted sum of the uplink use band and the downlink use band exceeds the threshold T1, the control target For STAs included in the set S and not belonging to the set P, the determination condition “included in the control target set S” is used if the weighted total value of the uplink use band and the downlink use band exceeds the threshold T2. Other determination conditions may be used as long as it is possible to determine whether or not to add to the control target set S for each STA based on the weighted total value of the uplink usage band and the downlink usage band of at least one STA. In addition, although the case in which the number of preferred SAT sets is one has been illustrated above, there may be a plurality of levels of preferred STA sets.

Embodiment 6
In the band control method of the present embodiment, the value relating to the use band used for the determination in the determination procedure is the sum of the uplink use band and the downlink use band, or at least one of the uplink use band and the downlink use band weighted. The total value is a value obtained by dividing the transmission rate of the STA to be determined.

  The present embodiment is an example in which the determination unit uses “band occupancy time” as the determination condition of the control target set S. When STAs having different channel transmission rates coexist in the same wireless LAN NW, for example, if band control is performed so as to make the used bandwidth fair, STAs having small channel transmission rates occupy a large transmission time. Therefore, in the present embodiment, a value obtained by dividing the weighted total value of the uplink use band and the downlink use band by the channel transmission rate of each STA is used as an index of the "band occupancy time" of each STA, and this is a determination criterion in the determination procedure. Use as.

  The present embodiment is also applicable to the communication system described in the first to fourth embodiments. Furthermore, the priority control shown in the fifth embodiment can be used in combination.

Seventh Embodiment
The present embodiment is an example in which the determination condition is changed according to the usage rate of the wireless LAN band. Here, as the utilization rate, any ratio may be used as long as it indicates the degree of congestion of signals in the wireless LAN NW. For example, it is possible to use the ratio of the used band to the maximum transmission band of the wireless LAN NW, or to use the ratio of the period during which signal transmission is performed within the wireless LAN NW within a fixed period. .

  For example, assuming that period t, utilization r, threshold T3, and threshold T4 (T3> T4), the utilization of the wireless LAN band becomes r or more continuously for period t or more. If the total value of the used band exceeds the threshold T4, the judgment condition of including it in the control target set S is used, but in other cases (normal), the total value of the uplink used band and the downlink used band is the threshold T3. If the above condition is exceeded, a method of using the determination condition "included in the control target set S" can be considered. Further, the determination condition may be changed according to the congestion degree of the wireless LAN band based on the weighted total value of the uplink use band and the downlink use band of at least one STA.

  The present embodiment is also applicable to the communication system described in the first to fourth embodiments. In addition, the present embodiment may use the priority control shown in the fifth embodiment in combination, and may use it together with the band control based on the band occupancy time shown in the sixth embodiment.

10, 10a, 10b, 10c: relay device 11: ONU
12: Splitter 15: OLT
20: Wireless LAN NW
21, 21a, 21b: AP
22: STA
40: communication partner 51, 61: communication relay unit 52, 52b, 62, 62b: band control unit 53, 63: interface unit 54, 64: determination unit 55, 65: instruction unit 301, 302, 303, 304: communication system

Claims (8)

A communication system comprising an access point (AP) of one wireless LAN network in communication with a plurality of wireless LAN stations (STAs),
The AP is
Among the STAs, a determination unit that determines, as a set S, STAs in which the values regarding the use band obtained by combining the downlink direction from AP to STA and the uplink direction from STA to AP as a set S, and downlink Restriction control to reduce at least the downstream usage band of STAs included in the set S so that the usage bandwidth in the direction and the upstream direction is equaled, promote promotion to increase at least the downstream usage band of STAs not included in the set S A band control unit having an instruction unit that issues a predetermined band control instruction that is control combination or combination control of the restriction control and the promotion control;
A communication relay unit that notifies the bandwidth control unit of a value related to the usage bandwidth and controls the usage bandwidth of the STA based on the predetermined bandwidth control instruction from the bandwidth control unit;
A communication system comprising: The relay device further relays data from the AP to the communication partner of the STA and data from the communication partner to the AP,
The relay device is
PON (Passive Optical Network) comprising an optical subscriber line network unit (ONU: Optical Network Unit) connected to the AP, a splitter, and an optical subscriber line termination unit (OLT: Optical Line Terminal) connected to the communication partner The communication system according to claim 1, characterized in that: A communication system including: an AP of one wireless LAN network that communicates with a plurality of STAs; and a relay apparatus that relays data from the AP to a communication partner of the STA and data from the communication partner to the AP.
The relay device is
Among the STAs, a determination unit that determines, as a set S, STAs in which the values regarding the use band obtained by combining the downlink direction from AP to STA and the uplink direction from STA to AP as a set S, and downlink Restriction control to reduce at least the downstream usage band of STAs included in the set S so that the usage bandwidth in the direction and the upstream direction is equaled, promote promotion to increase at least the downstream usage band of STAs not included in the set S A band control unit having an instruction unit that issues a predetermined band control instruction that is control combination or combination control of the restriction control and the promotion control;
A communication relay unit that notifies the bandwidth control unit of a value related to the usage bandwidth and controls the usage bandwidth of the STA based on the predetermined bandwidth control instruction from the bandwidth control unit;
A communication system comprising: The relay device is
A PON comprising an ONU connected to the AP, a splitter, and an OLT connected to the communication partner, wherein the bandwidth control unit and the communication relay unit are disposed in the ONU or the OLT. The communication system according to 3. A communication system including: an AP of one wireless LAN network that communicates with a plurality of STAs; and a relay apparatus that relays data from the AP to a communication partner of the STA and data from the communication partner to the AP.
The relay device is
A first band control having a determination unit that determines, as a set S, STAs whose values regarding the use band obtained by combining the downlink direction from AP to STA and the uplink direction from STA to the AP among the STAs match a predetermined determination condition Department,
The first band control unit is notified of the value regarding the used band, the information of the STAs belonging to the set S is received from the first band control unit, and the STA belonging to the set S is notified to the AP 1 Communication relay unit,
Equipped with
The AP is
Using the combined downlink and uplink for each STA band reduces at least downlink bandwidth used STA included in the set S to be fair limit control, the use of at least the downlink STA that is not included in the set S A second band control unit having an acceleration control for increasing the frequency band, or an instruction unit that issues an instruction for predetermined bandwidth control that is combination control of the limit control and the acceleration control;
A second communication relay unit configured to control a band used by the STA based on the predetermined band control instruction from the second band control unit;
A communication system comprising: The relay device is
The PON includes an ONU connected to the AP, a splitter, and an OLT connected to the communication partner, and the first band control unit and the first communication relay unit are disposed in the ONU or the OLT. The communication system according to claim 5.   The determination unit determines a value relating to the use band used for the determination as a sum value of the uplink use band and the downlink use band, a sum value of the uplink use band and the downlink use band in which at least one is weighted, or the sum value The communication system according to any one of claims 1 to 6, which is a value obtained by dividing the transmission rate of the target STA. The predetermined band control is
Priority control for preferentially allocating a bandwidth to STAs not belonging to the set S,
Delay control for adding a delay to a signal addressed to an STA belonging to a set S or a signal whose source is an STA belonging to the set S;
Discard control for discarding a signal addressed to an STA belonging to the set S or a signal whose source is an STA belonging to the set S,
Alternatively, the communication system according to any one of claims 1 to 7, which is a combination of at least two of the priority control, the delay control, and the discard control.

Images