WO2013125177A1 - 通信装置とトラヒック制御方法 - Google Patents
通信装置とトラヒック制御方法 Download PDFInfo
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- WO2013125177A1 WO2013125177A1 PCT/JP2013/000758 JP2013000758W WO2013125177A1 WO 2013125177 A1 WO2013125177 A1 WO 2013125177A1 JP 2013000758 W JP2013000758 W JP 2013000758W WO 2013125177 A1 WO2013125177 A1 WO 2013125177A1
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- traffic
- radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0252—Traffic management, e.g. flow control or congestion control per individual bearer or channel
- H04W28/0263—Traffic management, e.g. flow control or congestion control per individual bearer or channel involving mapping traffic to individual bearers or channels, e.g. traffic flow template [TFT]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/41—Flow control; Congestion control by acting on aggregated flows or links
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/08—Load balancing or load distribution
- H04W28/09—Management thereof
- H04W28/0958—Management thereof based on metrics or performance parameters
- H04W28/0967—Quality of Service [QoS] parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/10—Flow control between communication endpoints
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
Definitions
- the present invention relates to a communication apparatus and a traffic control method.
- a network constructed by a wireless link such as a fixed wireless access (FWA) using a wireless system using a frequency such as a millimeter wave band capable of broadband transmission is used in a mobile phone network or the like.
- the communication quality of the radio link varies depending on the SNR (Signal to Noise Ratio) of the received signal.
- an adaptive modulation technique is attracting attention.
- a symbol rate and a modulation multi-level number are adaptively selected according to a transmission path condition (radio condition of a radio link), and the modulation scheme is used properly so that the transmission efficiency becomes the best modulation scheme.
- the adaptive modulation technology it is possible to perform optimal wireless communication according to the wireless environment, and improvement in frequency efficiency can be expected.
- a plurality of physical lines are virtually bundled into one, and the band corresponding to the total amount of the physical lines can be used.
- a link aggregation technique is used.
- the most efficient use of bandwidth is the packet-based traffic distribution method that determines the link to be used for each packet.
- Patent Document 1 discloses a traffic distribution control device that enables even band distribution to a plurality of physical ports constituting a logical port of link aggregation.
- Patent Document 2 discloses a bandwidth corresponding to the number of normal physical lines by referring to user bandwidth control information for each normal physical line even when a failure occurs in each physical line logically integrated as link aggregation.
- a method and apparatus for performing control over user traffic is disclosed.
- Patent Document 3 based on the information of the maximum flow rate band and the average flow rate band reflecting the actual traffic flow rate, the flow rate band distributed to the physical ports is found, and the flow rate band is discriminated to determine the amount of traffic.
- a packet distribution method for distributing the packets so as to be averaged is disclosed.
- Patent Documents 1 to 3 are based on a wired link in which the link bandwidth does not vary, and it is not possible to perform wireless link traffic distribution considering the case where the bandwidth varies due to adaptive modulation.
- Patent Document 4 discloses a radio apparatus that demultiplexes a radio frame transmitted in a radio section multilinked by a plurality of radio links for each radio link layer in a data link layer.
- the radio entrance unit converts an MRL (Multi Radio Link) frame distributed by the aggregation switch into a radio frame and transmits the radio frame for each radio link in the radio section.
- the radio entrance unit receives each radio link in the radio section, converts it to an MRL frame, and outputs the MRL frame to the aggregation switch.
- the aggregation switch aggregates the MRL frames and reassembles them into network frames.
- the wireless device disclosed in Patent Document 4 requires overhead and processing such as division and restoration for all frames, and the use band accompanying header information attached at the time of division increases.
- Patent Document 5 discloses a communication apparatus that distributes packets according to QoS (Quality of Service) for each wireless system in a communication environment using a plurality of different wireless systems such as cognitive radio. .
- the radio link to be transmitted is determined in consideration of the priority of traffic and the quality of the radio link.
- processing is performed in units of packets, the occurrence of rearrangement cannot be avoided, and it is not suitable for high-priority traffic.
- a receiver performs selective measurement on downlink transmission, and combines a past measurement (or past channel quality estimate) with a current measurement (or current channel quality estimate); It predicts what the channel quality will be at a certain time in the future, derives a predicted channel quality indicator (CQI: Channel Quality Indicator), and the predicted CQI is transmitted to the transmitter and used to update transmission parameters.
- CQI represents any one of a recommended transport block size, a modulation format, the number of codes, a power offset, and a plurality of different types of link adaptation parameters.
- Patent document 7 predicts a drop in line quality due to rain from rainfall information and performs bandwidth priority control in advance, thereby transmitting in advance information that cannot be transmitted due to a rain break and reducing the throughput drop due to line deterioration of the radio line An apparatus is disclosed.
- Patent Documents 1 to 3 are based on a wired link in which the link band does not vary, and cannot perform wireless link traffic distribution in consideration of bandwidth variation due to adaptive modulation. Further, the technique disclosed in Patent Document 4 has a problem of overhead that requires processing of division and restoration for all frames, and increases the use band accompanying header information attached at the time of division. Furthermore, in the technique disclosed in Patent Document 5, a radio link to be transmitted is determined in consideration of traffic priority and radio link quality. However, since processing is performed in units of packets, the occurrence of order change cannot be avoided, and is not suitable for high-priority traffic.
- the present invention has been made in view of the above problems, and an object of the present invention is to ensure high-priority traffic communication quality and efficiently accommodate traffic in link aggregation in which a plurality of radio links are bundled. And to provide a way.
- a plurality of radio links are bundled between nodes, and the radio link used by the traffic is determined based on the stability of the band in each modulation method in each radio link and the traffic pattern for each path priority.
- a traffic control method for determining is provided.
- a plurality of radio links are bundled and used between communication devices, and the radio link used by the traffic is determined based on the stability of the band in each modulation method in the radio link and the traffic pattern for each path priority.
- a communication device comprising means for determining is provided.
- the communication quality of high priority traffic can be ensured and traffic can be accommodated efficiently.
- the usable bandwidth is more important than the communication quality.
- a band provided with a high modulation scheme high transmission rate (for example, a possibility of being temporarily unavailable) is allocated. Good.
- the optimum method for each of the bandwidth of the wireless link to be used, the traffic distribution method, and the like is different.
- the traffic is distributed in consideration of the difference in the band of the wireless link to be used and the traffic distribution method according to the communication quality required by the traffic.
- two communication devices (101, 102) are connected to a counterpart communication device (102, 101) by a plurality of wireless links (111, 112). Therefore, optimal bandwidth allocation and traffic distribution are performed based on the state of the wireless link of the communication device itself (101, 102) and the information of the flowing traffic.
- FIG. 2 is a flowchart for explaining a processing procedure according to an exemplary embodiment. A processing procedure according to an exemplary embodiment will be described with reference to FIGS. 1 and 2.
- the communication device (101, 102) checks the state of the wireless link connected to the partner communication device (102, 101) (step 201). At that time, the communication devices (101, 102) acquire, for example, a history of modulation schemes used in the past, weather information, and the like for each band (increase in bandwidth) provided by each modulation scheme of the radio link. Calculate the stability of.
- the stability of the modulation scheme c refers to the rate at which the modulation scheme c or a modulation scheme having a transmission rate higher than that is used. The stability is calculated, for example, every Tinterval interval (time interval), and the stability St [c] of the modulation scheme c in the t-th interval is given by the following equation.
- M is a set of radio link modulation schemes, and c is included in M (see Equation (3) of Non-Patent Document 1).
- the final stability FSt [c] is obtained by reflecting the past value of St [c] for each interval using a moving average or the like (see Equation (4) of Non-Patent Document 1).
- each modulation method selected by adaptive modulation includes, for example, [QPSK (Quadrature Phase Shift Keying), 16 QAM (Quadrature Amplitude Modulation), 32 QAM, 128 QAM] and the like.
- Increasing the radio link modulation scheme also increases the transmission rate. For example, the transmission rate is 40 Mbps when the transmission rate is QPSK, and 80 Mbps when the transmission rate is 16 QAM. second).
- the bandwidth of the radio link increases by 40 Mbps.
- This 40 Mbps band is a band provided by 16QAM. Since this band can be used for a modulation scheme of 16QAM or higher, the stability of 16QAM becomes the stability of the band.
- the communication device (101, 102) checks the traffic information (step 202). .
- the communication device (101, 102) obtains a band that can be used by high-priority traffic based on the stability for each band (step 203).
- the bandwidth stability required for each priority is specified in advance for the entire network including the communication device (101, 102), and the communication device (101, 102) is required for each priority.
- the band that can be allocated is checked from the bands that satisfy the stability.
- the priority for example, high priority, low priority, etc.
- the priority is grasped from the priority information described in the header of each frame.
- the priority is designated by the operator based on the type of traffic in advance, for example. For example, QCI (QoS Class Identifier) of 3GPP (3rd Generation Partnership Project) corresponds to the priority.
- the traffic amount and the high-priority traffic are allocated. Based on the bandwidth, a radio link used for transferring high-priority traffic may be determined.
- the radio link to be used may be determined in consideration of the ratio of the vacant bandwidth with high reliability.
- the communication devices determine processing for low-priority traffic (step 204).
- the communication devices (101, 102) distribute the traffic in consideration of the free bandwidth of each wireless link including the bandwidth with low reliability.
- a traffic distribution method in units of packets is used in which the radio link used for each packet is changed according to the ratio of the free bandwidth for each radio link.
- Embodiment 1 of the present invention will be described below.
- the first embodiment is applied to a communication device that is connected to the same communication device (the same connection destination) via a plurality of wireless links.
- the communication device 101 is connected to the communication device 102 via a plurality of wireless links 111 and 112.
- the communication apparatuses 101 and 102 determine how to use the wireless links 111 and 112 to transfer traffic flowing between the communication apparatuses 101 and 102. The process will be described.
- the communication devices 101 and 102 check their own radio link state held in a storage device (not shown), and based on past history and statistical information (for example, trend information such as average, maximum, minimum, etc.), stability for each band in each modulation method
- the degree is calculated (step 201 in FIG. 2).
- the communication devices 101 and 102 measure the traffic flowing through the own devices 101 and 102, and classify the traffic into a path unit and a flow unit within a range that can be recognized by the own devices 101 and 102 (step 202 in FIG. 2). Based on the header information of the frames that can be seen by the communication apparatuses 101 and 102, the traffic is identified in units of paths and flows. In step 202 of FIG. 2, the communication apparatuses 101 and 102 classify the paths or flows in more detail based on the priority.
- the communication apparatuses 101 and 102 determine to which radio link the traffic is assigned according to the path flow and priority (steps 203 and 204 in FIG. 2).
- the communication apparatuses 101 and 102 decide the radio link to be used so that the same radio link is transferred using a highly stable band as much as possible.
- the traffic granularity that can be recognized by the communication devices 101 and 102 is a path unit such as MPLS (Multi-Protocol LabelLSwitching) LSP (Label ⁇ Switched Path) or the like
- the path is recognized in label units and VLAN (Virtual In the case of (Local Area Network)
- the communication apparatuses 101 and 102 recognize a path based on the VLAN ID and set a link in units of paths.
- the communication devices 101 and 102 When the communication devices 101 and 102 can read up to the IP (Internet Protocol) header of each packet, the communication device 101 and 102 recognizes with a finer granularity of the flow unit, such as a combination of the source IP address and the destination IP address. Set the link. From the priority of each header (MPLS: EXP bit, VLAN: bit PCP (Priority Code Point) indicating priority, IP: TOS (Type Of Service) indicating the priority of the IP packet), the priority of traffic is grasped. .
- MPLS EXP bit
- VLAN bit PCP (Priority Code Point) indicating priority
- IP TOS (Type Of Service) indicating the priority of the IP packet
- step 204 in FIG. 2 when the granularity that can be recognized by the communication apparatuses 101 and 102 is coarse in units of paths, on the basis of the ratio of the free bandwidth of each radio link, Change the wireless link through and transfer.
- the free bandwidth considered by the communication devices 101 and 102 is the bandwidth that can be used in each wireless link, except for the bandwidth that is considered to be used in high-priority traffic, so that the bandwidth of each link can be maximized.
- the radio link to be used is changed on a packet basis.
- a link to be used is set based on the ratio of the free bandwidth in the flow unit, and the traffic amount of each flow The radio link to be used is changed according to the fluctuation of
- FIG. 5 is a diagram illustrating an example of a configuration of a wireless communication apparatus (communication apparatuses 101 and 102 in FIG. 1) that performs link aggregation that bundles a plurality of wireless links. Since the communication devices 101 and 102 have the same configuration, the communication device 101 will be described below.
- the communication device 101 includes communication units 511, 512, 513, and 514 that connect to a plurality of wireless links and perform wireless communication with a partner communication device, a frame processing unit 501, a link information management unit 502, a resource management unit 503, A traffic information management unit 504 is provided.
- the traffic information management unit 504 manages the traffic amount information in units of paths and flows in addition to the route table for each destination. That is, as the traffic information flowing through the wireless link, for example, the used bandwidth, the transfer destination communication device, and the traffic amount for each priority are managed.
- the frame processing unit 501 Based on the destination information stored in the traffic information management unit 504, the frame processing unit 501 performs not only the transfer of frames but also the identification of traffic in units of path and flow and the measurement of traffic volume, thereby managing traffic information. Information including the next destination information is stored in section 504.
- the communication quality of the wireless link is measured by the communication units 511 to 514 and stored in the link information management unit 502.
- the frame processing unit 501 acquires weather information from the outside through the communication units 511 to 514, the frame processing unit 501 records the information in the link information management unit 502.
- the link information management unit 502 manages, as link quality information, for example, the stability of each modulation scheme, BER (Bit ⁇ Error Rate), SNR (Signal to Noise Ratio), and the current modulation scheme.
- the resource management unit 503 calculates the traffic allocation setting based on the traffic information periodically recorded in the traffic information management unit 504 and the link information of the link information management unit 502, and sets the traffic information management unit 504 for each destination. Update the routing table.
- the communication apparatuses 101 and 102 in FIG. 1 are connected by two wireless links 111 and 112, and the bandwidth of the wireless links 111 and 112 is as follows (note that the following stability uses reliability) May be).
- Wireless link 111 Up to 155 Mbps, stability up to 99.99% up to 40 Mbps.
- Wireless link 112 Up to 155Mbps, stability up to 99.99% up to 80Mbps.
- the communication apparatus 101 (102) flows traffic as follows.
- the allocation setting that best matches the bandwidth of each radio link with a stability of 99.99% and the amount of traffic is determined.
- the high-priority traffic of path A uses a band where the stability of link 111 is 99.99%
- the high-priority traffic of path B uses a band where stability of link 112 is 99.99%.
- the wireless link is sorted and transferred in units of packets.
- the radio link to be used is determined according to the ratio of the free bandwidth excluding the bandwidth scheduled to be used with high priority.
- FIG. 3 is a diagram schematically illustrating the result of traffic control according to the first embodiment.
- FIG. 3 schematically shows that low-priority traffic of paths A and B is distributed to the radio link 111 and the radio 112 at a ratio of 25/42 and 17/42.
- the high priority traffic is handled in the same manner as in the first embodiment.
- Low-priority traffic is a combination in which the average amount of low-priority traffic on each path is compared with the free bandwidth (remaining bandwidth allocated to high-priority traffic) on each link, and the difference (absolute value) between them is minimized. Search for.
- 15)
- 15). The case is the smallest.
- the communication devices 101 and 102 are set so that each low-priority traffic passes through a radio link different from the radio link used by the high-priority traffic.
- the radio links used by each traffic are as follows.
- Path A High priority traffic ⁇ radio link 111
- Path B High priority traffic ⁇ radio link 112, low priority traffic ⁇ radio link 111
- the communication apparatuses 101 and 102 periodically measure the average traffic volume of the low priority traffic of each path, and check the optimum link for the link used by the low priority traffic each time. For example, assume that the average traffic volume of low-priority traffic on each path changes as follows. Path A: 70 Mbps to 85 Mbps, Path B: 110 Mbps to 30 Mbps In this case, the path A low-priority traffic uses the radio link 111, and the path B low-priority traffic uses the radio link 112, so the difference from the free bandwidth becomes smaller. change.
- the link setting of each traffic after the change uses the radio link 111 for the low-priority traffic of the path A and the radio link 112 for the low-priority traffic of the path B.
- the link bandwidth can be used efficiently without affecting the high-priority traffic.
- the wireless links 111 and 112 have been described, but it is needless to say that the number of wireless links bundled by link aggregation is not limited to two.
- (Appendix 1) Use multiple bundled wireless links between nodes, A traffic control method characterized in that a radio link used by traffic is determined from the stability of a band in each modulation system in each radio link and a traffic pattern for each path priority.
- (Appendix 2) The traffic control method according to appendix 1, wherein traffic distribution is performed for traffic of the same path so as to satisfy communication quality required by each of the traffic pattern and the priority of the path.
- (Appendix 3) The traffic control method according to appendix 1 or 2, wherein the traffic pattern is a pattern indicating a traffic characteristic including at least one of an average traffic volume, a maximum traffic volume, and burstiness.
- At least the first traffic with the higher priority of each path is assigned a band of a radio link having a band with a stability equal to or higher than a predetermined value and having a band higher than the traffic amount, Allocating a plurality of radio links in units of packets based on a ratio of free bands excluding a band used in the first traffic of each radio link for at least a second traffic having a lower priority of each path.
- the traffic control method according to any one of appendices 1 to 5, characterized in that: (Appendix 7) From the size of the band where the stability of the radio link is a predetermined value or more determined in advance and the traffic amount of each path, At least the first traffic with the higher priority of each path is assigned a band of a radio link having a band with a stability equal to or higher than a predetermined value and having a band higher than the traffic amount, At least the second traffic with the lower priority of each path compares the average traffic amount of the second traffic of each path with the free bandwidth in each wireless link, and the difference between the free bandwidth and the average traffic amount is compared. 6.
- the traffic control method according to any one of appendices 1 to 5, wherein radio link allocation is performed based on the allocation.
- a communication apparatus comprising: means for determining a radio link used by traffic from the stability of a band in each modulation scheme in a radio link and a traffic pattern for each path priority.
- Appendix 9 9. The communication apparatus according to appendix 8, wherein traffic distribution is performed for traffic of the same path so as to satisfy communication quality required by each according to the traffic pattern and the priority of the path.
- the traffic pattern is a pattern indicating a traffic characteristic including at least one of an average traffic volume, a maximum traffic volume, and burstiness. (Appendix 11) 11.
- Communication equipment (Appendix 12)
- the bandwidth stability in the modulation scheme of the wireless link is calculated based on the history of the modulation scheme used in the wireless link and the history of information indicating the radio wave environment of the wireless link.
- the communication device according to any one of 8 to 11.
- the communication device according to any one of appendices 8 to 12, characterized by: (Appendix 14) From the size of the band where the stability of the radio link is a predetermined value or more determined in advance and the traffic amount of each path, At least the first traffic with the higher priority of each path is assigned a band of a radio link having a band with a stability equal to or higher than a predetermined value and having a band higher than the traffic amount, At least the second traffic with the lower priority of each path compares the average traffic amount of the second traffic of each path with the free bandwidth in each wireless link, and the difference between the free bandwidth and the average traffic amount is determined. 14. The communication device according to any one of appendices 8 to 13, wherein a radio link is allocated based on the communication link.
- (Appendix 17) The communication system according to appendix 15 or 16, wherein the traffic pattern is a pattern indicating a traffic characteristic including at least one of an average traffic volume, a maximum traffic volume, and burstiness.
- Appendix 18 Any one of appendices 15 to 17, wherein the node device predicts a modulation scheme of the radio link and calculates a band stability in the modulation scheme of the radio link based on the predicted modulation scheme.
- the node device calculates the stability of the band in the modulation scheme of the radio link based on the history of the modulation scheme used in the radio link and the history of information indicating the radio wave environment of the radio link;
- the communication system according to any one of supplementary notes 15 to 18, characterized by: (Appendix 20) The node device, based on the size of a band having a predetermined stability or more than the predetermined value of the stability of the radio link, and the traffic amount of each path, At least the first traffic with the higher priority of each path is assigned a band of a radio link having a band with a stability equal to or higher than a predetermined value and having a band higher than the traffic amount, Allocating a plurality of radio links in units of packets based on a ratio of free bands excluding a band used in the first traffic of each radio link for at least a second traffic having a lower priority of each path.
- the communication system according to any one of supplementary notes 15 to 19, characterized by: (Appendix 21) The node device, based on the size of a band having a predetermined stability or more than the predetermined value of the stability of the radio link, and the traffic amount of each path, At least the first traffic with the higher priority of each path is assigned a band of a radio link having a band with a stability equal to or higher than a predetermined value and having a band higher than the traffic amount, At least the second traffic with the lower priority of each path compares the average traffic amount of the second traffic of each path with the free bandwidth in each wireless link, and the difference between the free bandwidth and the average traffic amount is compared.
- a radio link is assigned based on the communication link.
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Abstract
Description
・高優先トラヒックの通信品質の保証と、
・リンク帯域の有効活用
の両方を同時に満たすトラヒック処理の実現は困難である。
(I)同一パスのトラヒックであれば同じ無線リンクを固定的に使うか、又は、
(II)すべてパケット単位でトラヒック分散をする、
という二者択一しかないため、通信品質か効率性のどちらかを犠牲にする必要があった。
(A)高い通信品質が要求される高優先トラヒックの通信品質の維持、及び、
(B)複数の無線リンクの効率的な帯域の使用
が可能となっている。
<実施形態1>
実施形態1では、通信装置において認識できるトラヒックの粒度がパス単位で比較的粗い場合における例について説明する。なお、以下の数値は、あくまで実施形態1を例示するためのものであり、本発明を制限するために解釈されるべきものでないことは勿論である。
無線リンク112は、155-70=85(Mbps)、
から、各パケットを転送する際に使われる無線リンク111と112の比率は、
無線リンク111:無線リンク112=125:85=25:17となる。
<実施形態2>
実施形態2では、高優先トラヒックの扱いは、前記実施形態1と同様にして行う。低優先トラヒックは、各パスの低優先トラヒックの平均トラヒック量と、各リンクにおける空き帯域(高優先トラヒックに割り当てた帯域の残り)を比較し、両者の差(絶対値)が一番小さくなる組み合わせを探す。
パスB:高優先トラヒック→無線リンク112、低優先トラヒック→無線リンク111
この結果、各トラヒックのリンク設定は、図4(A)の401に示される通りになる。
パスA:70Mbpsから85Mbps、
パスB:110Mbpsから30Mbps
この場合、パスAの低優先トラヒックは無線リンク111を使用し、パスBの低優先トラヒックは無線リンク112を使用する方が、空き帯域と差が小さくなるため、低優先トラヒックが使う無線リンクを変更する。すなわち、
(1)パスA、Bの低優先トラヒックとして無線リンク111、112を使用する場合、空き帯域と平均トラヒック量の差は、|125-85|=40、|85-30|=55となり、
(2)パスA、Bの低優先トラヒックとして、無線リンク112、111を使用する場合の空き帯域と平均トラヒック量の差は、|125-30|=95、|85-85|=0となる。空き帯域と平均トラヒック量の差の絶対値の最大がより小さい方の組み合わせ(1)に変更される。
(付記1)
ノード間で無線リンクを複数束ねて使用し、
各無線リンクにおける各変調方式での帯域の安定度と、パスの優先度毎のトラヒックパターンから、トラヒックが使用する無線リンクを決定する、ことを特徴とするトラヒック制御方法。
(付記2)
同一パスのトラヒックに対し、前記トラヒックパターンと前記パスの優先度に応じてそれぞれが要求する通信品質を満たすようにトラヒック分散を行う、ことを特徴とする付記1に記載のトラヒック制御方法。
(付記3)
前記トラヒックパターンは、平均トラヒック量、最大トラヒック量、バースト性の少なくとも1つを含むトラヒックの特性を指し示すパターンである、ことを特徴とする付記1又は2記載のトラヒック制御方法。
(付記4)
前記無線リンクの変調方式を予測し、予測した変調方式に基づいて前記無線リンクの前記変調方式での帯域の安定度を算出する、ことを特徴とする付記1から3のいずれか1項に記載のトラヒック制御方法。
(付記5)
前記無線リンクで使用された変調方式の履歴、前記無線リンクの電波環境を示す情報の履歴に基づいて、前記無線リンクの前記変調方式での帯域の安定度を算出する、ことを特徴とする付記1乃至4のいずれか1項に記載のトラヒック制御方法。
(付記6)
前記無線リンクの安定度が予め定められた所定値以上の帯域の大きさと、各パスのトラヒック量から、
各パスの優先度が高い方の少なくとも第1のトラヒックは、前記安定度が予め定められた所定値以上の帯域であって、トラヒック量以上の帯域を有する無線リンクの帯域を割り当て、
各パスの優先度が低い方の少なくとも第2のトラヒックに関して、各無線リンクの前記第1のトラヒックで使われる帯域を除外した空き帯域の比率に基づき、パケット単位で複数の無線リンクを振り分ける、ことを特徴とする付記1乃至5のいずれか1項に記載のトラヒック制御方法。
(付記7)
前記無線リンクの安定度が予め定められた所定値以上の帯域の大きさと、各パスのトラヒック量から、
各パスの優先度が高い方の少なくとも第1のトラヒックは、前記安定度が予め定められた所定値以上の帯域であって、トラヒック量以上の帯域を有する無線リンクの帯域を割り当て、
各パスの優先度が低い方の少なくとも第2のトラヒックは、各パスの第2のトラヒックの平均トラヒック量と、各無線リンクにおける空き帯域を比較し、前記空き帯域と前記平均トラヒック量の差に基づき、無線リンクの割り当てを行う、ことを特徴とする付記1乃至5のいずれか1項に記載のトラヒック制御方法。
(付記8)
通信装置間で無線リンクを複数束ねて使用し、
無線リンクにおける各変調方式での帯域の安定度と、パスの優先度毎のトラヒックパターンから、トラヒックが使用する無線リンクを決定する手段を備えた、ことを特徴とする通信装置。
(付記9)
同一パスのトラヒックに対し、前記トラヒックパターンと前記パスの優先度に応じてそれぞれが要求する通信品質を満たすようにトラヒック分散を行う、ことを特徴とする付記8に記載の通信装置。
(付記10)
前記トラヒックパターンは、平均トラヒック量、最大トラヒック量、バースト性の少なくとも1つを含むトラヒックの特性を指し示すパターンである、ことを特徴とする付記8又は9記載の通信装置。
(付記11)
前記無線リンクの変調方式を予測し、予測した変調方式に基づいて前記無線リンクの前記変調方式での帯域の安定度を算出する、ことを特徴とする付記8から10のいずれか1項に記載の通信装置。
(付記12)
前記無線リンクで使用された変調方式の履歴、前記無線リンクの電波環境を示す情報の履歴に基づいて、前記無線リンクの前記変調方式での帯域の安定度を算出する、ことを特徴とする付記8乃至11のいずれか1項に記載の通信装置。
(付記13)
前記無線リンクの安定度が予め定められた所定値以上の帯域の大きさと、各パスのトラヒック量から、
各パスの優先度が高い方の少なくとも第1のトラヒックは、前記安定度が予め定められた所定値以上の帯域であって、トラヒック量以上の帯域を有する無線リンクの帯域を割り当て、
各パスの優先度が低い方の少なくとも第2のトラヒックに関して、各無線リンクの前記第1のトラヒックで使われる帯域を除外した空き帯域の比率に基づき、パケット単位で複数の無線リンクを振り分ける、ことを特徴とする付記8乃至12のいずれか1項に記載の通信装置。
(付記14)
前記無線リンクの安定度が予め定められた所定値以上の帯域の大きさと、各パスのトラヒック量から、
各パスの優先度が高い方の少なくとも第1のトラヒックは、前記安定度が予め定められた所定値以上の帯域であって、トラヒック量以上の帯域を有する無線リンクの帯域を割り当て、
各パスの優先度が低い方の少なくとも第2のトラヒックは、各パスの第2のトラヒックの平均トラヒック量と、各無線リンクにおける空き帯域を比較し、前記空き帯域と前記平均トラヒック量の差に基づき、無線リンクの割り当てを行う、ことを特徴とする付記8乃至13のいずれか1項に記載の通信装置。
(付記15)
ノード装置間で無線リンクを複数束ねて使用し、
前記ノード装置は、無線リンクにおける各変調方式での帯域の安定度と、パスの優先度毎のトラヒックパターンから、トラヒックが使用する無線リンクを決定する、ことを特徴とする通信システム。
(付記16)
前記ノード装置は、同一パスのトラヒックに対し、前記トラヒックパターンと前記パスの優先度に応じてそれぞれが要求する通信品質を満たすようにトラヒック分散を行う、ことを特徴とする付記15に記載の通信システム。
(付記17)
前記トラヒックパターンは、平均トラヒック量、最大トラヒック量、バースト性の少なくとも1つを含むトラヒックの特性を指し示すパターンである、ことを特徴とする付記15又は16記載の通信システム。
(付記18)
前記ノード装置は、前記無線リンクの変調方式を予測し、予測した変調方式に基づいて前記無線リンクの前記変調方式での帯域の安定度を算出する、ことを特徴とする付記15から17のいずれか1項に記載の通信システム。
(付記19)
前記ノード装置は、前記無線リンクで使用された変調方式の履歴、前記無線リンクの電波環境を示す情報の履歴に基づいて、前記無線リンクの前記変調方式での帯域の安定度を算出する、ことを特徴とする付記15乃至18のいずれか1項に記載の通信システム。
(付記20)
前記ノード装置は、前記無線リンクの安定度が予め定められた所定値以上の帯域の大きさと、各パスのトラヒック量から、
各パスの優先度が高い方の少なくとも第1のトラヒックは、前記安定度が予め定められた所定値以上の帯域であって、トラヒック量以上の帯域を有する無線リンクの帯域を割り当て、
各パスの優先度が低い方の少なくとも第2のトラヒックに関して、各無線リンクの前記第1のトラヒックで使われる帯域を除外した空き帯域の比率に基づき、パケット単位で複数の無線リンクを振り分ける、ことを特徴とする付記15乃至19のいずれか1項に記載の通信システム。
(付記21)
前記ノード装置は、前記無線リンクの安定度が予め定められた所定値以上の帯域の大きさと、各パスのトラヒック量から、
各パスの優先度が高い方の少なくとも第1のトラヒックは、前記安定度が予め定められた所定値以上の帯域であって、トラヒック量以上の帯域を有する無線リンクの帯域を割り当て、
各パスの優先度が低い方の少なくとも第2のトラヒックは、各パスの第2のトラヒックの平均トラヒック量と、各無線リンクにおける空き帯域を比較し、前記空き帯域と前記平均トラヒック量の差に基づき、無線リンクの割り当てを行う、ことを特徴とする付記15乃至19のいずれか1項に記載の通信システム。
111、112 無線リンク
401 初期の各トラヒックの使用リンク設定
402 再設定後の各トラヒックの使用リンク設定
501 フレーム処理部
502 リンク情報管理部
503 リソース管理部
504 トラヒック情報管理部
511、512、513、514 通信部
Claims (10)
- ノード間で無線リンクを複数束ねて使用し、
各無線リンクにおける各変調方式での帯域の安定度と、パスの優先度毎のトラヒックパターンから、トラヒックが使用する無線リンクを決定する、ことを特徴とするトラヒック制御方法。 - 同一パスのトラヒックに対して前記トラヒックパターンと前記パスの優先度に応じてそれぞれが要求する通信品質を満たすようにトラヒック分散を行う、ことを特徴とする請求項1に記載のトラヒック制御方法。
- 前記トラヒックパターンは、平均トラヒック量、最大トラヒック量、バースト性の少なくとも1つを含むトラヒックの特性を指し示すパターンである、ことを特徴とする請求項1又は2記載のトラヒック制御方法。
- 前記無線リンクの変調方式を予測し、予測した変調方式に基づいて前記無線リンクの前記変調方式での前記帯域の前記安定度を算出する、ことを特徴とする請求項1から3のいずれか1項に記載のトラヒック制御方法。
- 前記無線リンクで使用された変調方式の履歴、前記無線リンクの電波環境を示す情報の履歴に基づいて、前記無線リンクの前記変調方式での前記帯域の前記安定度を算出する、
ことを特徴とする請求項1乃至4のいずれか1項に記載のトラヒック制御方法。 - 前記無線リンクの安定度が予め定められた所定値以上の帯域の大きさと、各パスのトラヒック量から、
各パスの優先度が高い方の少なくとも第1のトラヒックは、前記安定度が予め定められた所定値以上の帯域であって、トラヒック量以上の帯域を有する無線リンクの帯域を割り当て、
各パスの優先度が低い方の少なくとも第2のトラヒックに関して、各無線リンクの前記第1のトラヒックで使われる帯域を除外した空き帯域の比率に基づき、パケット単位で複数の無線リンクを振り分ける、ことを特徴とする請求項1乃至5のいずれか1項に記載のトラヒック制御方法。 - 前記無線リンクの安定度が予め定められた所定値以上の帯域の大きさと、各パスのトラヒック量から、
各パスの優先度が高い方の少なくとも第1のトラヒックは、前記安定度が予め定められた所定値以上の帯域であって、トラヒック量以上の帯域を有する無線リンクの帯域を割り当て、
各パスの優先度が低い方の少なくとも第2のトラヒックは、各パスの第2のトラヒックの平均トラヒック量と、各無線リンクにおける空き帯域を比較し、前記空き帯域と前記平均トラヒック量の差に基づき、無線リンクの割り当てを行う、ことを特徴とする請求項1乃至5のいずれか1項に記載のトラヒック制御方法。 - 通信装置間で無線リンクを複数束ねて使用し、
無線リンクにおける各変調方式での帯域の安定度と、パスの優先度毎のトラヒックパターンから、トラヒックが使用する無線リンクを決定する手段を備えた、ことを特徴とする通信装置。 - 同一パスのトラヒックに対して前記トラヒックパターンと前記パスの優先度に応じてそれぞれが要求する通信品質を満たすようにトラヒック分散を行う、ことを特徴とする請求項8に記載の通信装置。
- 前記トラヒックパターンは、平均トラヒック量、最大トラヒック量、バースト性の少なくとも1つを含むトラヒックの特性を指し示すパターンである、ことを特徴とする請求項8又は9記載の通信装置。
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