WO2015064054A1 - 無線基地局、トラフィック負荷分散方法およびプログラムが記憶された記憶媒体 - Google Patents
無線基地局、トラフィック負荷分散方法およびプログラムが記憶された記憶媒体 Download PDFInfo
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- WO2015064054A1 WO2015064054A1 PCT/JP2014/005330 JP2014005330W WO2015064054A1 WO 2015064054 A1 WO2015064054 A1 WO 2015064054A1 JP 2014005330 W JP2014005330 W JP 2014005330W WO 2015064054 A1 WO2015064054 A1 WO 2015064054A1
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- radio base
- base station
- backhaul
- load information
- network
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000003860 storage Methods 0.000 title claims description 22
- 230000008569 process Effects 0.000 claims abstract description 7
- 238000009826 distribution Methods 0.000 claims description 9
- 230000007423 decrease Effects 0.000 abstract description 10
- 238000004891 communication Methods 0.000 description 28
- 238000010586 diagram Methods 0.000 description 18
- 230000002776 aggregation Effects 0.000 description 14
- 238000004220 aggregation Methods 0.000 description 14
- 238000005457 optimization Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 239000000969 carrier Substances 0.000 description 2
- 241001417495 Serranidae Species 0.000 description 1
- 238000005315 distribution function Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/22—Performing reselection for specific purposes for handling the traffic
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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
- H04L47/12—Avoiding congestion; Recovering from congestion
- H04L47/125—Avoiding congestion; Recovering from congestion by balancing the load, e.g. traffic engineering
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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
-
- 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
- H04W28/0231—Traffic management, e.g. flow control or congestion control based on communication conditions
- H04W28/0236—Traffic management, e.g. flow control or congestion control based on communication conditions radio quality, e.g. interference, losses or delay
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
Definitions
- the present invention relates to a radio base station that distributes traffic load between base stations, a traffic load distribution method, and a storage medium in which a traffic load distribution program is stored.
- a backhaul (hereinafter referred to as a mobile backhaul) between a radio base station and a mobile core network may be configured by a plurality of links.
- FIG. 10 is an explanatory diagram illustrating an example of a mobile backhaul.
- the mobile backhaul is divided into an access link, an aggregation link, and a metro link.
- the access link is a link that accommodates a radio base station connected to a relay device installed in the access area.
- the aggregation link is a link that accommodates a plurality of radio base stations connected to a relay apparatus installed in the access area and a radio base station (not shown in FIG. 10) installed in the aggregation area.
- the metro link is a link in the metro area, and is a link for transferring large-capacity mobile data traffic of a plurality of radio base stations transferred via the aggregation link to the mobile core network.
- communication resources in the backhaul are referred to as backhaul resources.
- the traffic load on the backhaul resource is called a backhaul resource load.
- eNB evolved Node B
- MLB Mobility Load Balancing
- FIG. 11 is a sequence diagram showing resource status notification processing between eNBs.
- a resource status request message (X2: RESOURCE STATUS REQUEST message) is transmitted from eNB1 to an adjacent eNB (hereinafter referred to as an adjacent eNB), that is, eNB2.
- an adjacent eNB an adjacent eNB
- a response message (X2: RESOURCE STATUS RESPONSE message) to the resource status request message is transmitted from eNB2 to eNB1.
- FIG. 12 is an explanatory diagram showing the structure of the resource status request message.
- the eNB1 designates the load information of the neighboring eNB (eNB2) that has established the X2 link as a measurement target in the resource status request message. Specifically, as illustrated in FIG. 12, the eNB 1 designates “TNL (Transport Network Layer) load Index Period” in the parameter “Report Characteristics (measurement target item)” of the resource status request message. Thereby, eNB1 becomes possible [receiving load information of eNB2 regularly]. Note that a maximum of four pieces of load information can be designated in “Report Characteristics”. In this example, “TNL load Ind Periodic” is included in one of them.
- the eNB 1 receives a resource status update message (X2: RESOURCE STATUS UPDATE message) from the neighboring eNB.
- X2 RESOURCE STATUS UPDATE message
- FIG. 13 is an explanatory diagram showing the structure of the resource status update message.
- the resource status update message received by the eNB 1 includes “S1 TNL Load Indicator” as shown in FIG.
- S1 TNL Load Indicator is load information of the S1 transport network layer (hereinafter referred to as S1 network load information).
- the S1 network load information is information indicating a backhaul resource load of the link between the eNB and the relay device at the first hop from the eNB, that is, the access link.
- the value of the S1 network load information is indicated in four stages of “LowLoad”, “MediumLoad”, “HighLoad”, and “Overload”.
- the eNB 1 When the load on the TNL exceeds a certain threshold, the eNB 1 performs a handover (handover) in order to switch the cell in which the wireless terminal is located from the cell of the eNB 1 to a cell of an adjacent eNB with a low load. In order to do so, the handover attribute value (the value of the parameter for controlling handover described in the above technical specification) is changed. At this time, eNB1 designates a cell of an adjacent eNB having a low load as a handover destination based on the S1 network load information received from the adjacent eNB. Here, it is assumed that eNB1 specifies the cell of eNB2.
- eNB1 hands over the cell where the wireless terminal is located from the cell of eNB1 to the cell of eNB2, and distributes the backhaul resource load.
- Patent Document 1 in a wireless communication system in which an eNB performs communication using a plurality of carriers, an eNB exchanges carrier configuration information, load information, and resource usage status with other eNBs.
- carrier configuration information in which an eNB performs communication using a plurality of carriers
- load information in which an eNB performs communication using a plurality of carriers
- resource usage status with other eNBs.
- eNB1 and eNB2 use different access links.
- the aggregation link at the end of the access link used by eNB1 and eNB2 is the same, and that the backhaul resource load is high and congested in the aggregation link.
- the load distribution function works in each eNB. That is, the above procedures 3 to 4 are executed. Thereby, the cell in which the wireless terminal is located hands over from the cell of eNB1 to the cell of eNB2. As a result, the backhaul resource load in the access link is distributed. However, in the aggregation link, the backhaul resource load does not change, so congestion is not eliminated. For this reason, it is impossible to avoid a decrease in the throughput of the radio terminal in the cell of the handover destination eNB2. The reason is that the value indicated by “S1 TNL Load Indicator” included in the resource status update message indicates the backhaul resource load of the access link. That is, load distribution is not performed in consideration of the load information of the aggregation link.
- the eNB can acquire link load information from a management device (NMS (Network Management System)) that manages backhaul resources between the eNB and the mobile core network.
- NMS Network Management System
- the NMS may not manage all the links between the eNB and the mobile core network.
- the NMS may manage only the access link backhaul.
- the eNB cannot know the load information of the link with the highest load between the eNB and the mobile core network, that is, the bottleneck link.
- the eNB can acquire link load information from the NMS, there is a possibility that backhaul congestion and a decrease in throughput of the wireless terminal cannot be avoided.
- the present invention provides a radio base station, a traffic load distribution method, and a storage medium storing a traffic load distribution program that can more reliably avoid backhaul congestion and a decrease in throughput of a radio terminal. Objective.
- a radio base station includes a determination unit that generates network load information indicating a traffic load state in a backhaul between the own station and the core network, network load information generated by the determination unit, and an adjacent radio base And an execution unit for distributing the traffic load between the radio base stations based on the network load information received from the stations.
- the traffic load distribution method determines network load information indicating the resource load in the backhaul between the own station and the core network, and determines the determined network load information and the network load information received from the adjacent radio base station. Based on the above, distribution of the network load between the radio base stations is executed.
- the storage medium storing the traffic load distribution program according to the present invention is a process for generating network load information indicating the traffic load state in the backhaul between the local station and the core network, and the generated network load information. And a traffic load distribution program that executes a process of distributing the traffic load between the radio base stations based on the network load information received from the adjacent radio base stations.
- Embodiment 1 FIG. A first embodiment of the present invention will be described below with reference to the drawings.
- FIG. 1 is a block diagram showing an outline of a wireless communication network including a wireless base station according to the present invention.
- radio base stations eNBs 103 to 105
- EPC Evolved Packet Core
- FIG. 1 is a block diagram showing an outline of a wireless communication network including a wireless base station according to the present invention.
- radio base stations eNBs 103 to 105
- EPC Evolved Packet Core
- backhaul 200 a backhaul
- FIG. 2 is a block diagram showing an example of the configuration of the wireless communication network shown in FIG.
- the eNBs 103 to 105 are connected to the EPC 100 via the links 111 to 115 and the relay apparatuses 101 to 102. That is, the links 111 to 115 correspond to the backhaul 200 shown in FIG.
- the eNB 103 and the eNB 104 are connected to the relay device 101.
- the eNB 105 is connected to the relay device 102.
- the relay apparatuses 101 to 102 are connected to the EPC 100.
- the eNB 103 and the eNB 104 and the eNB 104 and the eNB 105 are connected by an X2 link, respectively.
- two relay apparatuses and three eNBs are illustrated, but there may be any number of relay apparatuses and eNBs.
- the wireless terminal 106 is located in the cell of the eNB 104 (cell 108 shown in FIG. 2).
- the radio terminal 106 is connected to the EPC 100 via the eNB 104 and the relay device 101.
- the state of the backhaul resource load in the link 111 connecting the EPC 100 and the relay apparatus 101 is “HighLoad”.
- the state of the backhaul resource load on the link 112 connecting the EPC 100 and the relay apparatus 102 is “MediumLoad”.
- the state of the backhaul resource load in the link 113 connecting the relay apparatus 101 and the eNB 103 is “LowLoad”.
- the state of the backhaul resource load in the link 114 connecting the relay apparatus 101 and the eNB 104 is “HighLoad”.
- the state of the backhaul resource load on the link 115 connecting the relay apparatus 102 and the eNB 105 is “MediumLoad”.
- “S1 TNL Load Indicator” received by the eNB 104 from the eNB 103 that is, the value of the S1 network load information indicates the backhaul resource load of the link 113. Therefore, the eNB 104 acquires “LowLoad” as the value of the S1 network load information of the eNB 103. Similarly, the value of the S1 network load information that the eNB 103 receives from the eNB 104 is “HighLoad”. Further, the value of the S1 network load information received by the eNB 104 from the eNB 105 is “MediumLoad”.
- each eNB determines which neighboring cell is the handover destination of radio terminal 106 based on the value indicated by the load information. .
- each eNB shares only S1 network load information.
- the eNB 104 determines the cell of the eNB 103 (the cell 107 shown in FIG. 2) as the handover destination because the value of the S1 network load information of the eNB 103 is “LowLoad”.
- FIG. 3 is an explanatory diagram showing how the eNBs 103 to 104 hand over the radio terminal from the cell (cell 108) where the radio terminal is located to another cell (cell 107).
- the eNB 103 and the eNB 104 cooperate to change the setting of the handover attribute value so that the radio terminal 106 can easily perform handover from the cell 108 to the cell 107. That is, the eNB 103 and the eNB 104 change the setting of the handover attribute value and move the handover boundary so that the cell 107 becomes the handover destination.
- the area of the cell 107 before changing the handover attribute value is indicated by a broken line in FIG.
- the backhaul resource load on link 114 is reduced, and the backhaul resource load on link 113 is increased. Thereby, the load is distributed between the link 113 and the link 114.
- the backhaul resource load of the link 111 that aggregates the link 113 and the link 114 is originally “HighLoad”. Therefore, even if the load is distributed between the link 113 and the link 114, the load on the link 111 is not reduced and remains “HighLoad”. Therefore, even if the cell in which the wireless terminal 106 is located is handed over, a decrease in the throughput of the wireless terminal 106 may not be avoided.
- a handover destination cell is determined based on a frequency band that can be used by each adjacent radio base station.
- the frequency band that can be used by each adjacent radio base station is defined by the difference between the total transport capacity allocated to the radio base station and the total GBR (guaranteed bit rate) of the active bearer.
- the total GBR of the active bearer is the total of the GBR of the active bearer including the communication overhead according to the S1 interface protocol (S1 Interface protocol).
- the optimization method uses a transport capacity that considers only the backhaul resource load of the link between the radio base station and the first hop relay device from the radio base station, that is, the access link. Therefore, in the above optimization method, the backhaul resource load of the aggregation link ahead of the access link is not considered.
- the frequency band defined by the difference between the transport capacity and the GBR total of the active bearer differs depending on whether or not the backhaul resource load of the aggregation link ahead of the access link is considered. As a result, even if MLB is executed between the radio base stations based on the optimization method, it is difficult to avoid congestion of the aggregation link and a decrease in throughput of the radio terminal.
- the radio base stations (eNBs 103 to 105) execute MLB considering the backhaul resource load of the aggregation link.
- FIG. 4 is a block diagram showing the configuration of the first embodiment of the radio base station according to the present invention.
- each eNB eNB 103 to 105 includes a communication unit 11, an estimation unit 12, a storage unit 13, a determination unit 14, and an execution unit 15.
- the communication unit 11 transmits and receives packets.
- the estimation unit 12 estimates a packet loss rate and a delay variation according to an Internet protocol performance measurement standard (IP Performance Metrics).
- IP Performance Metrics IP Performance Metrics
- the packet loss rate is a loss rate of a packet transmitted from the communication unit 11 to the EPC.
- the delay variation is the magnitude of the delay variation of the packet transmitted from the communication unit 11 to the EPC. Note that the estimation unit 12 may estimate other than the packet loss rate and the delay variation.
- the framework for Internet Protocol performance metrics is described in RFC (Request for comments) 2330.
- the Internet Protocol performance metric is a specification for a method in which the packet sender at the IP layer (IP Layer) estimates the packet loss rate and delay variation of the packet transmitted by itself and evaluates the reliability and performance of the network.
- IP Layer IP Layer
- a method described in RFC2680 is used as a method for estimating the packet loss rate.
- a method described in RFC3393 is used as a delay variation estimation method.
- the storage unit 13 stores information indicating an algorithm for determining S1 network load information.
- Each value of the S1 network load information is determined based on the estimation result of the packet loss rate and delay variation. Specifically, each value of the S1 network load information is determined to be, for example, any one of “LowLoad”, “MediumLoad”, “HighLoad”, and “Overload”.
- FIG. 5 is an explanatory diagram showing an example of information indicating an algorithm for determining S1 network load information.
- the storage unit 13 shows correspondence between the packet loss rate and delay variation and each value of the S1 network load information as information indicating the determination algorithm of the S1 network load information.
- the table is stored.
- the packet loss rate is divided into three stages of less than 0.01, 0.01 or more, less than 0.05, and 0.05 or more.
- the delay variation is divided into three stages of less than 1 msec, 1 msec or more, less than 5 msec, and 5 msec or more.
- each value of the S1 network load information shown in FIG. 5 indicates the backhaul resource load from the eNB to the EPC, that is, the traffic load in the backhaul 200 shown in FIG.
- the packet loss rate and the delay fluctuation value corresponding to each value of the S1 network load information shown in FIG. 5 are, for example, packet loss rates measured in advance according to the state of the backhaul resource load from the eNB to the EPC. It may be determined based on the measurement result of the delay variation.
- the packet loss rate and the delay fluctuation value corresponding to each value of the S1 network load information may be changed by the operator according to the configuration of the communication system.
- the determination unit 14 determines S1 network load information. Specifically, the determination unit 14 determines the backhaul resource from the local station to the EPC 100 based on the packet loss rate and the delay variation estimation result in the estimation unit 12 based on the information indicating the determination algorithm shown in FIG. Determine the load. And the determination part 14 sets a determination result to S1 network load information of the resource status update message transmitted to an adjacent eNB.
- the execution unit 15 transmits a resource status update message including the S1 network load information in which the determination result by the determination unit 14 is set to the neighboring eNB via the communication unit 11. Further, the execution unit 15 acquires a resource status update message including S1 network load information from the neighboring eNB via the communication unit 11.
- the execution unit 15 executes MLB based on the S1 network load information in which the determination result by the determination unit 14 is set and the S1 network load information received from the neighboring eNB.
- the communication unit 11, the estimation unit 12, the determination unit 14, and the execution unit 15 are realized by, for example, a CPU (Central Processing Unit) of a computer that operates according to a traffic load distribution program.
- the traffic load distribution program is stored in a storage device (not shown) of the computer, for example.
- the CPU reads the program and operates as the communication unit 11, the estimation unit 12, the determination unit 14, and the execution unit 15 according to the program.
- the communication part 11, the estimation part 12, the determination part 14, and the execution part 15 may be implement
- the storage unit 13 is realized by a storage device such as a RAM (Random Access Memory) of a computer, for example.
- a RAM Random Access Memory
- the communication unit 11 of the eNB 103 transmits a packet to the EPC 100.
- the EPC 100 notifies the eNB 103 of the reception status of packets transmitted from the eNB 103.
- the estimation unit 12 estimates the packet loss rate and the delay variation based on the reception status of the packet notified from the EPC 100 via the communication unit 11.
- the determination unit 14 determines a value to be set in the S1 network load information based on the estimation result of the packet loss rate and the delay variation in the estimation unit 12. At this time, the determination unit 14 determines a value to be set in the S1 network load information based on the information indicating the determination algorithm stored in the storage unit 13 as described above.
- the determination unit 14 uses the information indicating the determination algorithm illustrated in FIG. Determine “MediumLoad”. This determination result indicates that the backhaul resource load from the eNB 103 to the EPC 100 is “MediumLoad”.
- the execution unit 15 transmits a resource status update message including the S1 network load information in which the determination result of the determination unit 14 is set, to the neighboring eNB, for example, the eNB 104 illustrated in FIG.
- the eNBs 104 and 105 shown in FIG. 1 transmit resource status update messages in the same manner as the eNB 103, whereby information indicating the backhaul resource load of neighboring eNBs can be acquired between eNBs. That is, information indicating the backhaul resource load from each eNB to the EPC can be shared between eNBs. Therefore, the execution unit 15 of each eNB can execute MLB in consideration of the backhaul resource load of the aggregation link. That is, each eNB can set a cell of an adjacent eNB with a smaller load on the radio terminal as a handover destination.
- the eNB estimates the packet loss rate and delay variation of the packet transmitted to the EPC, and indicates the traffic load from the eNB to the EPC based on the estimation result. Determine load information. Thereby, even when the backhaul between the eNB and the mobile core network is configured by a plurality of links, it is possible to determine the S1 network load information in consideration of the existence of all links.
- the determined S1 network load information is notified to the neighboring eNB.
- the information which shows the backhaul resource load from each eNB to EPC can be shared between eNBs. Therefore, each eNB can execute MLB in consideration of not only the backhaul resource of the access link but also the entire congestion state of the backhaul resource configured by a plurality of links. Therefore, handover between eNBs at the time of MLB execution can be made more successful. Therefore, congestion between the eNB and the EPC, for example, congestion on the aggregation link can be avoided. Further, it is possible to more reliably avoid a decrease in the throughput of the wireless terminal.
- the present invention can be applied to a communication system having a plurality of radio base stations and a control device that manages backhaul resources.
- a communication part is a packet loss rate and delay fluctuation
- a packet loss rate (“Packet Loss Rate”) and a delay variation (“Delay Variation”) may be specified as an additional IE (Information Element) for a resource status update message between X2 links.
- a communication part should just transmit the resource status update message.
- FIG. 6 is an explanatory diagram showing a resource status update message in which the packet loss rate and delay variation are specified. According to such a configuration, for example, by transmitting a resource status update message from the eNB 103 to the eNB 104, the eNB 104 can acquire the packet loss rate and the delay variation value of the eNB 103.
- control device (SON (Self Organizing Network) / EMS (Element Management System) / HeNB-GW (Home eNB-Gateway)) that manages the eNB determines the packet loss rate and delay fluctuation value transmitted from the eNB. You may make it collect. Then, based on the packet loss rate and the delay fluctuation value between the eNB and the EPC, the control device performs four steps (“LowLoad”, “MediumLoad”, “HighLoad”, “Overload”, similarly to the S1 network load information). The backhaul resource load may be determined in association with the index ”)".
- the estimation unit 12 estimates the packet loss rate and delay variation from traffic from the eNB to the SeGW (Security Gateway), the switch, and the router, and the determination unit obtains the S1 network load information based on the estimation result. You may decide.
- SeGW Security Gateway
- the estimation unit 12 estimates the packet loss rate and delay variation between the eNB and the EPC using Ping (Packet Internet Grouper) or ECN (Explicit Congestion Notification: Congestion Information Notification Function) described in RFC3168. May be.
- Ping Packet Internet Grouper
- ECN Exlicit Congestion Notification: Congestion Information Notification Function
- the configuration of the radio base station in the second embodiment is the same as that in the first embodiment.
- the storage unit 13 of the present embodiment stores information indicating a determination algorithm for each type of backhaul link between the eNB and the EPC.
- the storage unit 13 stores information indicating a determination algorithm corresponding to the backhaul of the optical line and information indicating a determination algorithm corresponding to the backhaul of the satellite line.
- FIG. 7 is an explanatory diagram showing an example of information indicating a determination algorithm corresponding to the backhaul of the optical line.
- the packet loss rate is divided into three stages of less than 0.001, 0.001 or more, less than 0.005, and 0.005 or more.
- the delay variation is divided into three stages of less than 0.01 msec, 0.01 msec or more, less than 0.05 msec, and 0.05 msec or more.
- FIG. 8 is an explanatory diagram illustrating an example of information indicating a determination algorithm corresponding to the backhaul of the satellite line.
- the packet loss rate is divided into three stages of less than 0.05, 0.05 or more, less than 0.1, and 0.1 or more.
- the delay variation is divided into three stages of less than 10 msec, 10 msec or more, less than 50 msec, and 50 msec or more.
- the determination unit 14 of this embodiment switches the determination algorithm for the S1 network load information according to the type of backhaul link. For example, when the backhaul link is an optical line, the S1 network load information is determined based on the information shown in FIG. For example, when the backhaul link is a satellite line, the S1 network load information is determined based on the information shown in FIG.
- the eNB 103 estimates the packet loss rate and delay variation of the packet transmitted to the EPC 100 according to the type of backhaul link, and determines the S1 network load information based on the estimation result. To do.
- the communication unit 11 When the communication unit 11 can acquire information indicating the type of the backhaul link from the relay device or the like, the communication unit 11 determines the type of the backhaul link based on the information, and determines the determination result.
- the determination unit 14 may be notified.
- an operator or the like may specify the type of backhaul link to the determination unit 14 in advance via an operation unit (not shown) of the eNB.
- the algorithm for determining the S1 network load information is switched according to the type of backhaul line, so that the same effect as in the first embodiment can be obtained and the algorithm according to the type of backhaul line in use
- the value of the S1 network load information can be determined. That is, the value of the S1 network load information can be determined based on packet loss and delay variation that can actually occur on the backhaul line in use.
- control device (SON / EMS / HeNB-GW) that manages the eNB estimates the packet loss rate and delay variation from the traffic from the eNB to the SeGW, the switch, and the router, and results of the estimation Based on the above, the value of the S1 network load information may be determined.
- FIG. 9 is a block diagram showing a minimum configuration of a radio base station according to the present invention.
- a radio base station according to the present invention includes a determination unit 14 that determines network load information indicating a traffic load in a backhaul between the local station and a core network, network load information that is determined by the determination unit 14, and adjacent radio bases And an execution unit 15 that distributes the traffic load between the radio base stations based on the network load information received from the stations.
- the radio base station may also include an estimation unit 12 (see FIG. 4) that estimates the loss rate and delay variation of packets transmitted from the local station to the core network.
- the determination part 14 is good also as determining the traffic load in the backhaul between an own station and a core network based on the estimation result of the estimation part 12, and making a determination result network load information. According to such a configuration, the traffic in the backhaul between the local station and the core network can be more accurately obtained by using the result of analyzing the packets going back and forth between the local station and the core network in determining the traffic load. The load can be determined.
- the radio base station determines to determine the traffic load in the backhaul between the local station and the core network based on the loss rate and delay variation of the packets transmitted from the local station to the core network.
- the determination part 14 may determine the traffic load in the backhaul between an own station and a core network based on the estimation result of the estimation part 12 based on a determination algorithm.
- the traffic load in the backhaul between the local station and the core network that is, the S1 network load information is surely based on the loss rate and delay variation of the packet transmitted from the local station to the core network. Can be requested.
- the determination unit 14 determines the traffic load more accurately. can do.
- the execution unit 15 may transmit the network load information determined by the determination unit 14 to the adjacent radio base station.
- information indicating the backhaul resource load from each eNB to the EPC can be shared between eNBs. Therefore, each eNB can execute MLB in consideration of not only the backhaul resource of the access link but also the entire congestion state of the backhaul resource configured by a plurality of links. Therefore, handover between eNBs at the time of MLB execution can be made more successful. Therefore, congestion between eNB and EPC can be avoided. Further, it is possible to more reliably avoid a decrease in the throughput of the wireless terminal.
- the execution unit 15 may transmit the packet loss rate and delay variation estimated by the estimation unit 12 to the adjacent radio base station together with the network load information.
- the wireless base station can perform other processing based on the determination algorithm held by itself based on the loss rate and delay variation value of packets received from other wireless base stations.
- the backhaul resource load from the radio base station to the EPC can be determined.
- the storage unit 13 stores information indicating a determination algorithm for each type of backhaul line, and the determination unit 14 determines the network load based on the determination algorithm corresponding to the type of backhaul line used by the local station. Information may be determined. According to such a configuration, MLB corresponding to the type of backhaul line used by the own station can be executed. Thereby, congestion between eNB and EPC can be avoided more reliably. Further, it is possible to more reliably avoid a decrease in the throughput of the wireless terminal.
- the execution unit 15 executes handover based on the network load information determined by the determination unit 14 and the network load information received from the adjacent radio base station, and the radio terminals located in the cell of the own station are You may make it be located in the cell of the adjacent wireless base station with small traffic load which the received network load information shows. According to such a configuration, a wireless terminal can be located in a cell of an adjacent eNB that has a smaller traffic load in the backhaul with the core network. As a result, backhaul congestion and a decrease in throughput of the wireless terminal can be avoided more reliably.
- Determination means for determining network load information indicating traffic load in backhaul between own station and core network, network load information determined by said determination means, and network received from adjacent radio base station And a means for executing distribution of traffic load between the radio base stations based on the load information.
- the estimation means which estimates the loss rate and delay variation of the packet transmitted to the core network from the own station, and the determination means, based on the estimation result of the estimation means,
- storage means which memorize
- the determination unit determines the traffic load in the backhaul between the local station and the core network based on the estimation result of the estimation unit based on the determination algorithm. base station.
- storage means memorize
- the radio base station according to Supplementary Note 4 to be determined.
- the execution means executes a handover based on the network load information determined by the determination means and the network load information received from an adjacent radio base station, and is a radio terminal located in the cell of the own station 7.
- the radio base station according to any one of appendix 1 to appendix 6, wherein the mobile station is located in a cell of an adjacent radio base station having a small traffic load indicated by the received network load information.
- the determination means is associated with the index of “S1 TNL Load” in the RESOURCE STATUS UPDATE message defined in the technical specification (TS36.423 Version 11.5.0), and is associated with the local station and the core network.
- the radio base station according to any one of appendix 2 to appendix 7, which determines a traffic load in the backhaul.
- the said estimation means estimates the packet loss rate and delay variation between a wireless base station and EPC using Ping or ECN, The radio
Abstract
Description
以下、本発明の第1の実施形態を図面を参照して説明する。
その結果、上記最適化方法に基づいて無線基地局間でMLBを実行したとしても、アグリゲーションリンクの輻輳や無線端末のスループット低下を回避することは難しい。
以下、本発明の第2の実施形態を図面を参照して説明する。
12 推定部
13 記憶部
14 決定部
15 実行部
100 EPC
101、102 中継装置
103、104、105 eNB
106 無線端末
107、108、109 セル
111、112、113、114、115 リンク
200 バックホール
Claims (9)
- 自局とコアネットワークとの間のバックホールにおけるトラフィック負荷を示すネットワーク負荷情報を決定する決定手段と、
前記決定手段が決定したネットワーク負荷情報と、隣接する無線基地局から受信したネットワーク負荷情報とに基づいて、無線基地局間のトラフィック負荷の分散を実行する実行手段とを含む
ことを特徴とする無線基地局。 - 自局からコアネットワークに送信されたパケットのロス率および遅延変動を推定する推定手段を含み、
前記決定手段は、前記推定手段の推定結果に基づいて、自局とコアネットワークとの間のバックホールにおけるトラフィック負荷を決定し、決定結果をネットワーク負荷情報とする
請求項1に記載の無線基地局。 - 前記実行手段は、前記推定手段が推定したパケットのロス率および遅延変動を、ネットワーク負荷情報とともに、隣接する無線基地局に送信する
請求項2に記載の無線基地局。 - 自局からコアネットワークに送信されたパケットのロス率および遅延変動から、自局とコアネットワークとの間のバックホールにおけるトラフィック負荷を決定するための決定アルゴリズムを示す情報を記憶する記憶手段を含み、
前記決定手段は、前記決定アルゴリズムをもとに、前記推定手段の推定結果に基づいて、自局とコアネットワークとの間のバックホールにおけるトラフィック負荷を決定する
請求項2または請求項3に記載の無線基地局。 - 前記記憶手段は、バックホール回線の種類ごとの決定アルゴリズムを示す情報を記憶し、
前記決定手段は、自局が利用するバックホール回線の種類に応じた決定アルゴリズムを用いて、ネットワーク負荷情報を決定する
請求項4に記載の無線基地局。 - 前記実行手段は、決定手段が決定したネットワーク負荷情報を、隣接する無線基地局に送信する
請求項1から請求項5のうちのいずれか1項に記載の無線基地局。 - 前記実行手段は、前記決定手段が決定したネットワーク負荷情報と、隣接する無線基地局から受信したネットワーク負荷情報とに基づいてハンドオーバを実行し、自局のセルに在圏する無線端末を、受信したネットワーク負荷情報が示すトラフィック負荷が小さい隣接する無線基地局のセルに在圏させる
請求項1から請求項6のうちのいずれか1項に記載の無線基地局。 - 自局とコアネットワークとの間のバックホールにおけるトラフィック負荷を示すネットワーク負荷情報を決定し、
決定した前記ネットワーク負荷情報と、隣接する無線基地局から受信したネットワーク負荷情報とに基づいて、無線基地局間のトラフィック負荷の分散を実行する
ことを特徴とするトラフィック負荷分散方法。 - コンピュータに、
自局とコアネットワークとの間のバックホールにおけるトラフィック負荷を示すネットワーク負荷情報を決定する処理と、
決定した前記ネットワーク負荷情報と、隣接する無線基地局から受信したネットワーク負荷情報とに基づいて、無線基地局間のトラフィック負荷の分散を実行する処理とを実行させるための
トラフィック負荷分散プログラムが記憶された記憶媒体。
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EP14859186.0A EP3065457B1 (en) | 2013-10-28 | 2014-10-21 | Load balancing using a determination algorithm corresponding to a physical type of a backhaul line |
JP2015544786A JPWO2015064054A1 (ja) | 2013-10-28 | 2014-10-21 | 無線基地局、トラフィック負荷分散方法およびプログラムが記憶された記憶媒体 |
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Publication number | Priority date | Publication date | Assignee | Title |
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Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2458258A (en) | 2008-02-04 | 2009-09-16 | Nec Corp | Method of controlling base station loading in a mobile communication system |
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EP3576487B1 (en) * | 2014-07-09 | 2022-04-13 | Sony Group Corporation | Apparatus for routing control in a network |
US20160218912A1 (en) * | 2015-01-27 | 2016-07-28 | Nokia Solutions And Networks Oy | Quality of experience aware transport self organizing network framework |
US11558912B2 (en) * | 2020-01-14 | 2023-01-17 | At&T Mobility Ii Llc | Methods, systems and computer programs for improving data throughput via backhaul sharing |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009206769A (ja) * | 2008-02-27 | 2009-09-10 | Ntt Docomo Inc | 呼制御システム及び呼制御方法 |
WO2011052643A1 (ja) | 2009-10-29 | 2011-05-05 | 日本電気株式会社 | 無線通信システム、無線通信方法、無線局、およびプログラム |
JP2011171994A (ja) * | 2010-02-18 | 2011-09-01 | Mitsubishi Electric Corp | 中継装置および通信システム |
JP2011250213A (ja) * | 2010-05-27 | 2011-12-08 | Kyocera Corp | 無線基地局、無線通信システム、及び制御方法 |
WO2011158862A1 (ja) * | 2010-06-18 | 2011-12-22 | 京セラ株式会社 | 無線通信システム、無線基地局、及び通信制御方法 |
JP2013222924A (ja) | 2012-04-19 | 2013-10-28 | Furukawa Electric Co Ltd:The | 部品内蔵基板 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7756043B1 (en) * | 2004-06-09 | 2010-07-13 | Sprint Communications Company L.P. | Method for identifying high traffic origin-destination node pairs in a packet based network |
JP5642164B2 (ja) * | 2010-04-28 | 2014-12-17 | 京セラ株式会社 | 無線通信システム、無線基地局、及び通信制御方法 |
JP2011250211A (ja) | 2010-05-27 | 2011-12-08 | Kyocera Corp | 無線通信システム、無線基地局、及び通信制御方法 |
EP2398293A1 (en) * | 2010-06-17 | 2011-12-21 | Alcatel Lucent | Method for managing a wireless telecommunication network |
US9055514B2 (en) | 2010-11-12 | 2015-06-09 | Qualcomm Incorporated | Method and apparatus for requesting and sharing network performance information (NPI) |
US9119107B2 (en) | 2011-02-04 | 2015-08-25 | Telefonaktiebolaget L M Ericsson (Publ) | Methods and devices for supporting backhaul selection |
-
2014
- 2014-10-21 EP EP14859186.0A patent/EP3065457B1/en active Active
- 2014-10-21 CN CN201480059510.4A patent/CN105684507B/zh active Active
- 2014-10-21 US US15/031,480 patent/US10045268B2/en active Active
- 2014-10-21 WO PCT/JP2014/005330 patent/WO2015064054A1/ja active Application Filing
- 2014-10-21 JP JP2015544786A patent/JPWO2015064054A1/ja active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009206769A (ja) * | 2008-02-27 | 2009-09-10 | Ntt Docomo Inc | 呼制御システム及び呼制御方法 |
WO2011052643A1 (ja) | 2009-10-29 | 2011-05-05 | 日本電気株式会社 | 無線通信システム、無線通信方法、無線局、およびプログラム |
JP2011171994A (ja) * | 2010-02-18 | 2011-09-01 | Mitsubishi Electric Corp | 中継装置および通信システム |
JP2011250213A (ja) * | 2010-05-27 | 2011-12-08 | Kyocera Corp | 無線基地局、無線通信システム、及び制御方法 |
WO2011158862A1 (ja) * | 2010-06-18 | 2011-12-22 | 京セラ株式会社 | 無線通信システム、無線基地局、及び通信制御方法 |
JP2013222924A (ja) | 2012-04-19 | 2013-10-28 | Furukawa Electric Co Ltd:The | 部品内蔵基板 |
Non-Patent Citations (2)
Title |
---|
"IEEE 23rd International Symposium on Personal, Indoor and Mobile Radio Communications-(PIMRC", 2012, NSN (NOKIA SOLUTIONS AND NETWORKS, article "Enhanced Mobility Load Balancing Optimization in LTE" |
See also references of EP3065457A4 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017183115A1 (ja) * | 2016-04-19 | 2017-10-26 | 富士通株式会社 | 無線通信システム、無線通信方法、基地局、及び、無線装置 |
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