WO2015135177A1 - Distributed clustering method, device, node, and system - Google Patents

Distributed clustering method, device, node, and system Download PDF

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Publication number
WO2015135177A1
WO2015135177A1 PCT/CN2014/073364 CN2014073364W WO2015135177A1 WO 2015135177 A1 WO2015135177 A1 WO 2015135177A1 CN 2014073364 W CN2014073364 W CN 2014073364W WO 2015135177 A1 WO2015135177 A1 WO 2015135177A1
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WO
WIPO (PCT)
Prior art keywords
working channel
channel
type
control node
network control
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Application number
PCT/CN2014/073364
Other languages
French (fr)
Chinese (zh)
Inventor
范小菁
王昊
田军
Original Assignee
富士通株式会社
范小菁
王昊
田军
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 富士通株式会社, 范小菁, 王昊, 田军 filed Critical 富士通株式会社
Priority to PCT/CN2014/073364 priority Critical patent/WO2015135177A1/en
Publication of WO2015135177A1 publication Critical patent/WO2015135177A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Definitions

  • the present invention relates to the field of communications, and in particular, to a distributed clustering method, apparatus, node, and system. Background technique
  • the WLAN standard proposed by CWPAN includes the 45GHz band.
  • the 45 GHz band is divided into two bandwidth channels of 540 MHz and 1.08 GHz, and a channel of 1.08 GHz bandwidth (referred to as a large bandwidth channel for short) and a channel of 540 MHz bandwidth (abbreviated as a small bandwidth channel) overlap each other.
  • Figure 1 is a schematic diagram of channel division in the 45 GHz band. Under such dynamic channel division, the primary and secondary channel management modes can flexibly extend the transmission bandwidth.
  • IEEE802.11aj defines a MAC (Media Access Control) framework based on primary and secondary channels in the 45 GHz band, and the primary channel is not fixed. In the dynamic primary and secondary channel framework, a network with a working bandwidth of 1.08 GHz not only interferes with other networks on the same channel, but also interferes with the networks on two overlapping 540 MHz channels.
  • PCP/AP1 is a network control device (PCP/AP1) operating on a channel with a bandwidth of 540 MHz
  • PCP/AP3 operating on a channel with a bandwidth of 540 MHz, and operating at a bandwidth overlapping with the high 540 MHz bandwidth and the low 540 MHz bandwidth.
  • the primary channel is selected to join the primary channel cluster, so it transmits its own beacon frame on the channel with a high 540 MHz bandwidth, and schedules the data transmission of the entire 1.08 GHz bandwidth channel.
  • the transmission of the data 2 of the PCP/AP2 may be related to the PCP.
  • the transmission of data 3 of /AP3 causes interference.
  • Embodiments of the present invention provide a distributed clustering method, apparatus, node, and system. To coordinate the transmission of beacon frames, thereby reducing the interference of beacon frame transmission. At the same time, it flexibly supports multiple working channel bandwidth selections, thereby increasing system throughput and channel utilization.
  • a first aspect of the embodiments of the present invention provides a distributed clustering method, where the method includes: the network control node determines a working channel according to a working bandwidth,
  • the network control node joins a cluster on a channel on the working channel or a channel bandwidth overlapping the working channel that is smaller than a channel bandwidth of the working channel according to the determined working channel, or on the working channel. Or clustering is established on a channel having a channel bandwidth that overlaps with the working channel and a channel bandwidth smaller than the working channel.
  • a second aspect of the embodiments of the present invention provides a distributed clustering device, where the device includes: a first determining unit, configured to determine a working channel of the network control node according to an operating bandwidth of the network control node,
  • Clusters, or clusters are established on the working channel or on a channel having a channel bandwidth that overlaps with the working channel that is smaller than the channel bandwidth of the working channel.
  • a third aspect of the embodiments of the present invention provides a network system, where the network system includes a network control node, and the network control node is configured to:
  • the beneficial effects of the embodiments of the present invention are as follows:
  • the method proposed by the embodiment of the present invention coordinates the transmission of the beacon frame, thereby reducing the interference of the beacon frame transmission.
  • the method can flexibly support multiple working channel bandwidth selections, thereby improving system throughput and channel utilization.
  • Figure 1 is a schematic diagram of channel division in the 45 GHz band
  • FIG. 2 is a schematic diagram of a beacon frame and a data frame transmission format of a device operating on a channel of different bandwidths
  • FIG. 3 is a flowchart of a distributed clustering method according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic diagram of cluster control information in an embodiment of Embodiment 1 of the present invention.
  • FIG. 5 is a schematic diagram of a beacon transmission format in an embodiment of Embodiment 1 of the present invention.
  • FIG. 6 is a schematic diagram of a beacon transmission format in another embodiment of Embodiment 1 of the present invention.
  • FIG. 7 is a schematic diagram of a beacon transmission format in another embodiment of Embodiment 1 of the present invention.
  • FIG. 8 is a schematic diagram of a beacon transmission format in another embodiment of Embodiment 1 of the present invention.
  • Embodiment 9 is a schematic diagram of beacon frame transmission in an embodiment of Embodiment 1 of the present invention.
  • FIG. 10 is a schematic diagram of beacon frame transmission in another embodiment of Embodiment 1 of the present invention.
  • Figure 11 is a block diagram showing the structure of a distributed clustering device according to Embodiment 2 of the present invention.
  • FIG. 12 is a schematic diagram showing the structure of a network control node according to Embodiment 3 of the present invention. detailed description
  • clusters are only established on the 540 MHz channel in order to be compatible with devices that only support 540 MHz bandwidth.
  • a network control node with a working bandwidth of 1.08 GHz needs to join two clusters on the overlapping 540 MHz channel at the same time, and send beacon frames on two 540 MHz channels according to the cluster rule to participate in cluster maintenance.
  • Embodiment 1 of the present invention provides a distributed clustering method
  • FIG. 3 is a flowchart of the method, which can be applied to a control node in a network, such as a PCP (Personal basic service set Control Point). Control point) or AP (Access Point), for convenience of explanation, hereinafter referred to as the network control node.
  • PCP Personal basic service set Control Point
  • AP Access Point
  • the method includes:
  • Step 301 The network control node determines a working channel according to the working bandwidth.
  • the network control node determines a channel whose working channel is 540 MHz bandwidth; if the working bandwidth of the network control node is 1.08 GHz, the network control node determines its The working channel is a channel of 1.08 GHz bandwidth.
  • the specific determination method can refer to the prior art, and details are not described herein again.
  • Step 302 The network control node joins a cluster on a channel on the working channel or a channel bandwidth overlapping the working channel that is smaller than a channel bandwidth of the working channel according to the determined working channel, or in the Clusters are established on the working channel or on a channel having a channel bandwidth that overlaps the working channel that is smaller than the channel bandwidth of the working channel.
  • the network control node if the working channel is a first type of working channel and there are no clusters on the first type of working channel, the network control node establishes a cluster on the first type of working channel.
  • the network control node can establish clusters on the current working channel.
  • the operation of establishing a cluster includes: determining cluster control information; periodically transmitting a beacon frame including cluster control information.
  • the cluster control information may include: a cluster ID, a cluster role, a cluster channel, and a beacon period.
  • cluster ID refers to The identifier of the cluster is used to distinguish different clusters
  • the cluster role indicates the role of the network control node relative to the cluster, such as a synchronization control node or a member.
  • the cluster is The network control node is established, and therefore, its cluster role is a synchronous control node;
  • the cluster channel is a channel indicating the establishment of the cluster, for example, a channel of 540 MHz in the present embodiment;
  • the beacon period indicates the interval at which the beacon frame is transmitted. , that is, how many times to send a beacon frame;
  • the maximum number of members of the cluster indicates the maximum number of members allowed by the cluster established by the network control node, that is, the maximum number of devices allowed to join the cluster;
  • the length of the beacon scheduling time indicates The length of time each member sends its own beacon frame.
  • the beacon frame including the cluster control information can be periodically transmitted.
  • FIG. 5 is a schematic diagram of a beacon transmission format for establishing a cluster by a network control node with a working bandwidth of 540 MHz in the embodiment.
  • the network control device sends its own beacon frame ⁇ 1 in each beacon interval of its working channel, where the beacon frame ⁇ 1 includes the network control node determined by the network control node.
  • Cluster control information As shown in FIG. 5, the network control device sends its own beacon frame ⁇ 1 in each beacon interval of its working channel, where the beacon frame ⁇ 1 includes the network control node determined by the network control node. Cluster control information.
  • the network controlling node joins the cluster.
  • the first type of working channel is a 540 MHz bandwidth channel.
  • the network control node can join the cluster.
  • the operation of joining the cluster includes: receiving the cluster control information by the listening channel; selecting the idle beacon scheduling time according to the channel monitoring result; and performing periodic beacon transmission at the selected beacon scheduling time.
  • the network control node may wait for the synchronization network control node of the receiving cluster to send a beacon frame by listening to the working channel, obtain cluster control information from the received synchronization beacon frame, and then according to the cluster control information and the Cluster synchronization on the working channel, and continues to listen to a beacon period of the working channel, thereby selecting an idle beacon scheduling time, periodically transmitting its own beacon at the selected channel scheduling time, thereby joining the A cluster of working channels.
  • the cluster control information, the beacon period, the beacon scheduling time, and the like have been previously described, and will not be described herein.
  • the network control node is respectively in the second class A cluster is established on two first type channels on which the working channels overlap.
  • the two first type of working channels are two consecutive consecutive This embodiment will be described by taking a channel of a high and low 540 MHz bandwidth and a channel of a second type of working channel overlapping the two first type of working channels as a channel of 1.08 GHz bandwidth.
  • the network control node needs to establish clusters on the two 540 MHz channels, respectively.
  • the operation of establishing a cluster is similar to the foregoing, including: determining cluster control information, periodically transmitting a beacon frame containing the cluster control information on two overlapping 540 MHz channels.
  • the cluster ID is the address of the network control node; the cluster roles are cluster synchronization control nodes.
  • the cluster channels are respectively a high 540 MHz channel and a low 540 MHz channel overlapping the 1.08 GHz channel.
  • the cluster control information may further include synchronization control information such as a beacon period, a maximum number of cluster members, and a beacon scheduling time length.
  • the network control node establishes the two clusters.
  • the synchronization control information may be the same or different.
  • FIG. 6 is a schematic diagram of a beacon transmission format in which a network control node with a working bandwidth of 1.08 GHz establishes a cluster in the present embodiment.
  • the clusters on two adjacent high and low 540 MHz channels use the same network control node PCP/AP as the cluster synchronization control node, and the network control nodes respectively cycle on the overlapping two high and low 540 MHz channels.
  • the beacon frame ⁇ 1 including the above-mentioned cluster control information is sent and the data is scheduled.
  • the data scheduling method can be used in the prior art, and details are not described herein again.
  • the two clusters when the two clusters are established, their respective synchronization information may be the same or different. If they are the same, after the two clusters are established, the number of networks and services on the channel with two 540 MHz bandwidths The amount of transformation, the synchronization control node can change the beacon period of the two clusters, the maximum number of cluster members supported, and the like according to the requirements, and the two clusters are no longer synchronized with each other. In the case that the two clusters are not synchronized, the synchronization control node establishing the two clusters needs to maintain two beacon periods, and respectively send beacons on the two 540 MHz bandwidth channels according to the synchronization information of the two clusters. frame.
  • the network control A node joins a cluster on the first type of channel with clusters and establishes a cluster on the first type of channel without clusters.
  • the clustered first type working channel is a channel with a high 540 MHz bandwidth
  • the first type of working channel without a cluster is a channel with a low 540 MHz bandwidth
  • the second type of working channel is a 1.08 GHz bandwidth working channel.
  • the network control node joins the high 540 MHz channel.
  • the process of joining the high 540 MHz channel is similar to the foregoing, and details are not described herein again.
  • the process for clusters established on a low 540 MHz channel is similar to the foregoing, wherein when a new cluster is established on a low 540 MHz channel, in the determined cluster control information, the cluster ID is the address of the network control node.
  • the cluster role is a synchronous control node, and the cluster channel is a corresponding low 540 MHz channel.
  • the cluster control information may further include synchronization information such as a beacon period, a maximum number of cluster members, and a beacon scheduling time length, and the synchronization information may be high.
  • the synchronization information of existing clusters on the 540 MHz channel is the same or different.
  • FIG. 7 is a schematic diagram of a beacon transmission format of a channel of 540 MHz high (existing cluster) and a channel of low 540 MHz (new cluster) in the present embodiment, as shown in FIG. 7, the channel of 540 MHz high and the channel of the low 540 MHz
  • the working channel (1.08 GHz channel) of the network control node (PCP/AP) of the embodiment overlaps.
  • the PCP/AP can directly join the existing cluster on the high 540 MHz channel, and at the beacon scheduling time of its own selection (as shown in Figure 7 for each letter)
  • the beacon scheduling time in the offset period (offset) 2) periodically transmits a beacon frame BTI2 including its cluster control information, where the cluster corresponding to the cluster control information is already on the high 540 MHz channel There are clusters.
  • the PCP/AP can establish a new cluster at the lower 540 MHz, and at the beacon scheduling time determined by itself (each beacon period as shown in FIG. 7)
  • the network control node selects the same beacon scheduling time on the low 540 MHz channel as the high 540 MHz channel, but this embodiment is not limited thereto. In other embodiments, the network control node is in the network control node.
  • the selected beacon scheduling time on the low 540 MHz channel can also be different from the high 540 MHz, such as selecting other idle beacon scheduling times as its own beacon scheduling time.
  • the newly created cluster and the existing cluster may be synchronized or not synchronized.
  • the synchronization control nodes of the two clusters may change the beacon of the cluster according to requirements. Synchronization information such as the period, the maximum number of cluster members supported, and so on. After changing the synchronization information, the above two clusters may no longer be synchronized.
  • the network control nodes belonging to both clusters need to maintain two beacon periods and respectively The beacon frame is transmitted on the two channels in accordance with the synchronization information of the two clusters.
  • the network control node respectively joins the second class.
  • a cluster on two first type channels on which the working channel overlaps is an example in which the first type of working channel is two adjacent consecutive high and low 540 MHz bandwidth channels, and the second type of working channel is 1.08 GHz bandwidth channel.
  • the network control node needs to join the two high and low 540 MHz.
  • the two high and low 540 MHz bandwidth channels are separately monitored, and the beacon frames transmitted by the synchronization control nodes of the clusters on the two channels are awaiting reception.
  • Cluster control information is obtained from the received beacon frame.
  • the two existing clusters are synchronized on the two high and low 540 MHz channels respectively, for example, an idle beacon scheduling time is selected to perform periodic beacon transmission.
  • the process of adding the network control node to the two clusters may be performed simultaneously; if the network control node does not support OFDM, the process of joining the network control node to the two clusters is required. Time-sharing, after joining a cluster, try to join another cluster.
  • FIG. 8 is a schematic diagram of a format of beacon transmission after a network control node whose working channel is 1.08 GHz bandwidth joins two clusters on an overlapping 540 MHz channel in the embodiment, as shown in FIG. 8, the network control node (PCP/AP) respectively Listening to the two high and low 540MHz channels, receiving beacon frames sent by the synchronization control node of the clusters on the two channels, selecting idle beacon scheduling time on each channel according to the received beacon frame, periodic A beacon frame BTB containing respective cluster control information is transmitted on the high and low 540 MHz channels, respectively.
  • PCP/AP network control node
  • control information such as synchronization beacon transmission time, beacon period, and maximum number of cluster members of two existing clusters on two adjacent high and low 540 MHz bandwidth channels may be different, that is, two clusters. If the synchronization information is inconsistent, the network control node with the working channel of 1.08 GHz needs to maintain two beacon periods, and perform periodic beacon frame transmission according to different cluster synchronization rules on the two high and low 540 MHz channels respectively.
  • the first type of working channel is a channel of 540 MHz bandwidth
  • the second type of channel is The channel of the 1.08 GHz bandwidth is taken as an example, but the present embodiment is not limited thereto.
  • the bandwidth of the first type channel and the second type channel may also be other bandwidths.
  • the second type of working channel may overlap with the first type of working channel.
  • the first type of working channel may also be a 270 MHz bandwidth channel
  • the second type of working channel may also be a 540 MHz bandwidth channel overlapping with two 270 MHz bandwidth channels.
  • the problem of clustering under the MAC framework of the primary and secondary channels is solved, and the multi-network coexistence of dynamically selecting the working channel can be accommodated, and the interference of control information transmission between the coexisting networks is avoided.
  • the network control node needs to separately send a beacon frame on two first type of working channels overlapping the second type of working channel. If the beacon scheduling time of the network control node on the two first type working channels is the same, as shown in FIG. 6 or FIG. 7, the network control node may send the two beacons in a time-sharing manner or simultaneously. frame. specific:
  • the network control node may overlap in time division with two of the second type of working channels.
  • the beacon frame is transmitted on a type of channel. As shown in Figure 9.
  • the network control node may simultaneously simultaneously overlap two first type channels with the second type of working channel. Two of the beacon frames are transmitted on. As shown in Figure 10. In this embodiment, since the beacon frame is transmitted in parallel, the beacon frame transmission efficiency is higher.
  • OFDM orthogonal frequency division multiplexing
  • the transmission of the beacon frame is coordinated, thereby reducing the interference of the beacon frame transmission.
  • it can flexibly support multiple working channel bandwidth selections, thereby increasing system throughput and channel utilization.
  • the embodiment of the invention further provides a distributed clustering device, which is applied to a network control node, and the principle of solving the problem by the distributed cluster device is similar to the method of the embodiment 1, and therefore, the specific implementation thereof
  • the implementation of the method of Embodiment 1 can be referred to, and the description of the same portions will not be repeated.
  • FIG 11 is a schematic diagram showing the structure of the distributed clustering device.
  • the distributed clustering device includes:
  • a first determining unit 111 configured to determine the network control node according to an operating bandwidth of the network control node Working channel
  • a clustering unit 112 according to the working channel of the network control node determined by the first determining unit, adding a channel having a channel bandwidth on the working channel or overlapping the working channel and having a smaller channel bandwidth than the working channel.
  • the cluster above, or clusters are established on the working channel or on a channel whose channel bandwidth overlaps with the working channel is smaller than the channel bandwidth of the working channel.
  • the clustering unit 112 includes:
  • the first processing unit 1121 is configured to join the cluster when the working channel of the network control node is a first type of working channel, and when there is already a cluster on the first type of working channel.
  • the clustering unit 112 includes:
  • the second processing unit 1122 establishes a cluster on the first type of working channel when the working channel of the network control node is a first type of working channel, and when there is no cluster on the first type of working channel.
  • the clustering unit 112 includes:
  • a third processing unit 1123 when the working channel of the network control node is a second type of working channel, and when there are no clusters on the two first type channels overlapping the second type of working channel, respectively A cluster is established on two first type channels in which the two types of working channels overlap.
  • the clustering unit 112 includes:
  • the fourth processing unit 1124 the working channel of the network control node is a second type of working channel, and there is no cluster on a first type of channel overlapping the second type of working channel, and the other type of channel has At the time of clustering, clusters on the first type of channel having clusters are added, and clusters are established on the first type of channels without clusters.
  • the clustering unit 112 includes:
  • a fifth processing unit 1125 when the working channel of the network control node is a second type of working channel, and when there are clusters on the two first type channels overlapping the second type of working channel, respectively A cluster on two first type channels on which the second type of working channel overlaps.
  • the clustering unit 112 includes:
  • the sending unit 1126 when the working channel of the network control node is the second type of working channel, respectively transmits a beacon frame on the two first type channels overlapping with the second type of working channel.
  • the network control node if the network control node has the same beacon scheduling time on the two first type channels overlapping the second type of working channel, and the network control node does not support orthogonal frequency division multiplexing (OFDM) technology Transmitting, in a time division manner, on two first type channels overlapping the second type of working channel
  • OFDM orthogonal frequency division multiplexing
  • the transmitting unit simultaneously transmits the beacon frame on two first type channels overlapping the second type of working channel.
  • the transmission of the beacon frame is coordinated, thereby reducing the interference of the beacon frame transmission.
  • it can flexibly support multiple working channel bandwidth selections, thereby increasing system throughput and channel utilization.
  • Embodiment 3 of the present invention provides a network control node including the distributed clustering device as described in Embodiment 2.
  • FIG. 12 is a schematic diagram showing the structure of a network control node according to an embodiment of the present invention.
  • network control node 1200 can include: a central processing unit (CPU) 1220 and memory 1210; and memory 1210 coupled to central processor 1220.
  • the memory 1210 can store various data; in addition, a program for information processing is stored, and the program is executed under the control of the central processing unit 1220 to receive various information transmitted by other nodes in the network.
  • the functionality of the distributed clustering device can be integrated into the central processor 1220.
  • the central processing unit 1220 may be configured to: determine, according to the working bandwidth, a working channel, according to the determined working channel, a channel bandwidth that is added to the working channel or overlaps with the working channel is smaller than a channel bandwidth of the working channel. Clusters on the channel, or clusters on the working channel or on a channel having a channel bandwidth that overlaps with the working channel that is smaller than the channel bandwidth of the working channel.
  • the central processor 1220 can also be configured to: if the working channel is a first type of working channel and there are already clusters on the first type of working channel, then the cluster is added.
  • the central processor 1220 can also be configured to: establish a cluster on the first type of working channel if the working channel is a first type of working channel and there are no clusters on the first type of working channel.
  • the central processing unit 1220 may be further configured to: if the working channel is a second type of working channel, and there are no clusters on the two first type channels overlapping the second type of working channel, respectively working with the second type Clusters are established on the two first type channels on which the channels overlap.
  • the central processing unit 1220 can also be configured to: if the working channel is a second type of working channel, and If there is no cluster on a first type of channel in which the second type of working channel overlaps, and there is a cluster on the other type of channel, the cluster on the first type of channel to which the cluster is added, and in the case where there is no cluster Clusters are established on the first type of channel.
  • the central processing unit 1220 is further configured to: if the working channel is a second type of working channel, and the two first type channels overlapping the second type of working channel have clusters, respectively, join the second type of work A cluster on two first type channels on which the channels overlap.
  • the central processor 1220 can also be configured to: if the working channel is a second type of working channel, transmit a beacon frame on each of the two first type of channels that overlap the second type of working channel.
  • the central processor 1220 can be configured to: transmit the beacon frame on two first type channels overlapping the second type of working channel in a time division manner; if the network control node Supporting orthogonal frequency division multiplexing (OFDM) techniques, the central processor 1220 can be further configured to: simultaneously transmit the beacon frame on two first type channels overlapping the second type of working channel .
  • OFDM orthogonal frequency division multiplexing
  • the distributed clustering device can be configured separately from the central processing unit 1220.
  • the distributed clustering device can be configured as a chip connected to the central processing unit 1220, controlled by the central processing unit 1220. Implement the functions of a distributed cluster device.
  • the network control node 1200 may further include: a sensor 1201, a transceiver 1204, a power module 1205, and the like.
  • a sensor 1201, a transceiver 1204, a power module 1205, and the like The functions of the foregoing components are similar to those of the prior art, and are not described herein again. It is to be noted that the network control node 1200 does not have to include all of the components shown in FIG. 12; in addition, the network control node 1200 may also include components not shown in FIG. 12, and reference may be made to the prior art.
  • the transmission of the beacon frame is coordinated, thereby reducing the interference of the beacon frame transmission.
  • it can flexibly support multiple working channel bandwidth selections, thereby improving system throughput and channel utilization.
  • the embodiment of the present invention further provides a network system, where the network system includes at least one network control node as described in Embodiment 3.
  • the network control node Since the network control node has been described in detail in Embodiment 3, the content thereof is incorporated herein, and details are not described herein again.
  • the transmission of the beacon frame is coordinated, thereby reducing the interference of the beacon frame transmission.
  • it can flexibly support multiple working channel bandwidth selections, thereby improving system throughput and channel utilization.
  • Embodiments of the present invention also provide a computer readable program, wherein when the program is executed in a distributed cluster device or a network control node, the program causes the computer to be in the distributed cluster device or network control
  • the distributed clustering method described in Embodiment 1 is performed in the node.
  • Embodiments of the present invention also provide a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute the distributed implementation described in Embodiment 1 in a distributed clustering device or a network control node. Cluster method.
  • the above apparatus and method of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software.
  • the present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps.
  • Logic components such as field programmable logic components, microprocessors, processors used in computers, and the like.
  • the present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.

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Abstract

Provided in embodiments of the present invention are a distributed clustering method, a device thereof, a node, and a network system. The method comprises: a network control node determines a working channel on the basis of a working bandwidth, the network control node joins, on the basis of the determined working channel, a cluster that is either on the working channel or on a channel overlapping the working channel and having a channel bandwidth that is less than the channel bandwidth of the working channel, or establishes a cluster either on the working channel or on a channel overlapping the working channel and having a channel bandwidth that is less than the channel bandwidth of the working channel. By means of the method in embodiments of the present invention, transmission of beacon frames is coordinated, thus reducing interference to signal beacon transmission. At the same time, multiple working channel bandwidth selections are flexibly supported, thus increasing system throughput and channel utilization rate.

Description

分布式的成簇方法、 装置、 节点和系统 技术领域  Distributed clustering method, device, node and system
本发明涉及通信领域， 特别涉及一种分布式的成簇方法、 装置、 节点和系统。 背景技术  The present invention relates to the field of communications, and in particular, to a distributed clustering method, apparatus, node, and system. Background technique
CWPAN ( China Wireless Personal Access Network, 中国无线个域网）提出的无线 局域网标准包括了 45GHz频段。 45GHz频段被划分为 540MHz、 1.08GHz两种带宽 信道， 并且 1.08GHz带宽的信道 （简称为大带宽信道） 和 540MHz带宽的信道 （简 称为小带宽信道） 会相互重叠。 图 1是 45GHz频段的信道划分的示意图， 在这样的 动态信道划分下， 主副信道的管理方式能够灵活扩展传输带宽。  The WLAN standard proposed by CWPAN (China Wireless Personal Access Network) includes the 45GHz band. The 45 GHz band is divided into two bandwidth channels of 540 MHz and 1.08 GHz, and a channel of 1.08 GHz bandwidth (referred to as a large bandwidth channel for short) and a channel of 540 MHz bandwidth (abbreviated as a small bandwidth channel) overlap each other. Figure 1 is a schematic diagram of channel division in the 45 GHz band. Under such dynamic channel division, the primary and secondary channel management modes can flexibly extend the transmission bandwidth.
IEEE (Institute of Electrical and Electronics Engineers, 电气和电子工程师协会） 802.11ad规定了一系列簇机制来避免同信道上网络 （也即基本服务集 （BSS， Basic Service Set)建立来的网络）之间的干扰。 IEEE802.11aj在 45GHz频段定义了基于主 副信道的 MAC (Media Access Control, 介质访问控制） 框架， 并且主信道不固定。 在动态主副信道框架下， 工作带宽为 1.08GHz 的网络不止干扰同信道其它网络， 也 可能与两个重叠 540MHz信道上的网络相互干扰。  IEEE (Institute of Electrical and Electronics Engineers, 802.11ad) specifies a series of clustering mechanisms to avoid inter-channel networking (that is, the network established by the Basic Service Set (BSS)). interference. IEEE802.11aj defines a MAC (Media Access Control) framework based on primary and secondary channels in the 45 GHz band, and the primary channel is not fixed. In the dynamic primary and secondary channel framework, a network with a working bandwidth of 1.08 GHz not only interferes with other networks on the same channel, but also interferes with the networks on two overlapping 540 MHz channels.
图 2 为工作在高 540MHz 带宽的信道的网络控制设备 （PCP/AP1 )、 工作在低 540MHz带宽的信道的网络控制设备 （PCP/AP3 ) 以及工作在与该高 540MHz带宽和 该低 540MHz带宽重叠的 1.08GHz带宽的信道的网络控制设备（PCP/AP2)的信标发 送格式的示意图， 如图 2所示， 由于 PCP/AP2工作在 1.08GHz带宽的信道上， 并选 择高 540MHz带宽的信道作为主信道，选择加入主信道簇， 因此其在高 540MHz带宽 的信道上发送自己的信标帧， 调度整个 1.08GHz 带宽的信道的数据传输， 则该 PCP/AP2的数据 2的传输有可能与 PCP/AP3的数据 3的传输产生干扰。  2 is a network control device (PCP/AP1) operating on a channel with a bandwidth of 540 MHz, a network control device (PCP/AP3) operating on a channel with a bandwidth of 540 MHz, and operating at a bandwidth overlapping with the high 540 MHz bandwidth and the low 540 MHz bandwidth. Schematic diagram of the beacon transmission format of the network control device (PCP/AP2) of the 1.08 GHz bandwidth channel, as shown in FIG. 2, since the PCP/AP2 operates on the channel of 1.08 GHz bandwidth, and selects a channel with a bandwidth of 540 MHz as the channel. The primary channel is selected to join the primary channel cluster, so it transmits its own beacon frame on the channel with a high 540 MHz bandwidth, and schedules the data transmission of the entire 1.08 GHz bandwidth channel. The transmission of the data 2 of the PCP/AP2 may be related to the PCP. The transmission of data 3 of /AP3 causes interference.
因此， IEEE 802.11ad簇机制应用在动态主副信道框架下无法有效避免干扰。 应该注意， 上面对技术背景的介绍只是为了方便对本发明的技术方案进行清楚、 完整的说明， 并方便本领域技术人员的理解而阐述的。不能仅仅因为这些方案在本发 明的背景技术部分进行了阐述而认为上述技术方案为本领域技术人员所公知。 发明内容 Therefore, the IEEE 802.11ad cluster mechanism cannot effectively avoid interference under the dynamic primary and secondary channel framework. It should be noted that the above description of the technical background is only for the purpose of facilitating the clear and complete description of the technical solutions of the present invention, and is convenient for understanding by those skilled in the art. The above technical solutions are not considered to be well known to those skilled in the art simply because these aspects are set forth in the background section of the present invention. Summary of the invention
本发明实施例提供一种分布式的成簇方法、 装置、 节点和系统。 以协调信标帧的 传输， 从而降低信标帧传输的干扰。 同时灵活性地支持多种工作信道带宽选择， 从而 提高系统吞吐量及信道利用率。  Embodiments of the present invention provide a distributed clustering method, apparatus, node, and system. To coordinate the transmission of beacon frames, thereby reducing the interference of beacon frame transmission. At the same time, it flexibly supports multiple working channel bandwidth selections, thereby increasing system throughput and channel utilization.
本发明实施例的第 1方面提供一种分布式的成簇方法， 其中， 所述方法包括： 网络控制节点根据工作带宽确定工作信道，  A first aspect of the embodiments of the present invention provides a distributed clustering method, where the method includes: the network control node determines a working channel according to a working bandwidth,
所述网络控制节点根据确定的工作信道，加入所述工作信道上的或者与所述工作 信道重叠的信道带宽比所述工作信道的信道带宽小的信道上的簇，或者在所述工作信 道上或者与所述工作信道重叠的信道带宽比所述工作信道的信道带宽小的信道上建 立簇。  And the network control node joins a cluster on a channel on the working channel or a channel bandwidth overlapping the working channel that is smaller than a channel bandwidth of the working channel according to the determined working channel, or on the working channel. Or clustering is established on a channel having a channel bandwidth that overlaps with the working channel and a channel bandwidth smaller than the working channel.
本发明实施例的第 2方面提供一种分布式的成簇装置， 其中， 所述装置包括： 第一确定单元，其根据所述网络控制节点的工作带宽确定所述网络控制节点的工 作信道，  A second aspect of the embodiments of the present invention provides a distributed clustering device, where the device includes: a first determining unit, configured to determine a working channel of the network control node according to an operating bandwidth of the network control node,
成簇单元，其根据第一确定单元确定的所述网络控制节点的工作信道，加入所述 工作信道上的或者与所述工作信道重叠的信道带宽比所述工作信道的信道带宽小的 信道上的簇，或者在所述工作信道上或者与所述工作信道重叠的信道带宽比所述工作 信道的信道带宽小的信道上建立簇。  a clustering unit that joins a working channel of the network control node determined by the first determining unit, and adds a channel bandwidth on the working channel or overlapping the working channel to a channel having a smaller channel bandwidth than the working channel. Clusters, or clusters are established on the working channel or on a channel having a channel bandwidth that overlaps with the working channel that is smaller than the channel bandwidth of the working channel.
本发明实施例的第 3方面提供一种网络系统， 其中， 所述网络系统包括网络控制 节点， 所述网络控制节点被配置为：  A third aspect of the embodiments of the present invention provides a network system, where the network system includes a network control node, and the network control node is configured to:
根据所述网络控制节点的工作带宽确定所述网络控制节点的工作信道； 根据确定的所述网络控制节点的工作信道，加入所述工作信道上的或者与所述工作信 道重叠的信道带宽比所述工作信道的信道带宽小的信道上的簇，或者在所述工作信道 上或者与所述工作信道重叠的信道带宽比所述工作信道的信道带宽小的信道上建立 簇。  Determining, according to the working bandwidth of the network control node, a working channel of the network control node; adding a channel bandwidth ratio on the working channel or overlapping the working channel according to the determined working channel of the network control node A cluster on a channel having a small channel bandwidth of the working channel, or a cluster on the working channel or a channel having a channel bandwidth overlapping the working channel smaller than a channel bandwidth of the working channel.
本发明实施例的有益效果在于： 通过本发明实施例提出的方法，协调了信标帧的 传输， 从而降低了信标帧传输的干扰。 同时该方法能够灵活性地支持多种工作信道带 宽选择， 从而提高了系统吞吐量及信道利用率。  The beneficial effects of the embodiments of the present invention are as follows: The method proposed by the embodiment of the present invention coordinates the transmission of the beacon frame, thereby reducing the interference of the beacon frame transmission. At the same time, the method can flexibly support multiple working channel bandwidth selections, thereby improving system throughput and channel utilization.
参照后文的说明和附图，详细公开了本发明的特定实施方式，指明了本发明的原 理可以被采用的方式。应该理解， 本发明的实施方式在范围上并不因而受到限制。在 所附权利要求的精神和条款的范围内，本发明的实施方式包括许多改变、修改和等同。 针对一种实施方式描述和 /或示出的特征可以以相同或类似的方式在一个或更多 个其它实施方式中使用， 与其它实施方式中的特征相组合， 或替代其它实施方式中的 特征。 Specific embodiments of the present invention are disclosed in detail with reference to the following description and the drawings, in which <RTIgt; It should be understood that the embodiments of the invention are not limited in scope. In The embodiments of the present invention include many variations, modifications, and equivalents within the scope of the spirit and scope of the appended claims. Features described and/or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, in combination with, or in place of, features in other embodiments. .
应该强调， 术语"包括 /包含"在本文使用时指特征、 整件、 步骤或组件的存在， 但并不排除一个或更多个其它特征、 整件、 步骤或组件的存在或附加。 附图说明  It should be emphasized that the term "comprising" or "comprising" is used to mean the presence of a feature, component, step or component, but does not exclude the presence or addition of one or more other features, components, steps or components. DRAWINGS
所包括的附图用来提供对本发明实施例的进一步的理解，其构成了说明书的一部 分， 用于例示本发明的实施方式， 并与文字描述一起来阐释本发明的原理。 显而易见 地， 下面描述中的附图仅仅是本发明的一些实施例， 对于本领域普通技术人员来讲， 在不付出创造性劳动性的前提下， 还可以根据这些附图获得其他的附图。 在附图中： 图 1是 45GHz频段的信道划分的示意图；  The drawings are included to provide a further understanding of the embodiments of the invention, and are in the Obviously, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive labor. In the drawings: Figure 1 is a schematic diagram of channel division in the 45 GHz band;
图 2是工作在不同带宽的信道上的设备的信标帧及数据帧发送格式示意图； 图 3是本发明实施例 1的一种分布式的成簇方法流程图；  2 is a schematic diagram of a beacon frame and a data frame transmission format of a device operating on a channel of different bandwidths; FIG. 3 is a flowchart of a distributed clustering method according to Embodiment 1 of the present invention;
图 4是本发明实施例 1的一种实施方式中簇控制信息示意图；  4 is a schematic diagram of cluster control information in an embodiment of Embodiment 1 of the present invention;
图 5是本发明实施例 1的一种实施方式中信标发送格式示意图；  FIG. 5 is a schematic diagram of a beacon transmission format in an embodiment of Embodiment 1 of the present invention; FIG.
图 6是本发明实施例 1的另一种实施方式中信标发送格式示意图；  6 is a schematic diagram of a beacon transmission format in another embodiment of Embodiment 1 of the present invention;
图 7是本发明实施例 1的另一种实施方式中信标发送格式示意图；  7 is a schematic diagram of a beacon transmission format in another embodiment of Embodiment 1 of the present invention;
图 8是本发明实施例 1的另一种实施方式中信标发送格式示意图；  FIG. 8 is a schematic diagram of a beacon transmission format in another embodiment of Embodiment 1 of the present invention; FIG.
图 9是本发明实施例 1的一种实施方式中信标帧发送示意图；  9 is a schematic diagram of beacon frame transmission in an embodiment of Embodiment 1 of the present invention;
图 10是本发明实施例 1的另一种实施方式中信标帧发送示意图；  FIG. 10 is a schematic diagram of beacon frame transmission in another embodiment of Embodiment 1 of the present invention; FIG.
图 11是本发明实施例 2的一种分布式的成簇装置构成示意图；  Figure 11 is a block diagram showing the structure of a distributed clustering device according to Embodiment 2 of the present invention;
图 12是本发明实施例 3的一种网络控制节点构成示意图。 具体实施方式  FIG. 12 is a schematic diagram showing the structure of a network control node according to Embodiment 3 of the present invention. detailed description
参照附图， 通过下面的说明书， 本发明的前述以及其它特征将变得明显。在说明 书和附图中， 具体公开了本发明的特定实施方式，其表明了其中可以采用本发明的原 则的部分实施方式， 应了解的是， 本发明不限于所描述的实施方式， 相反， 本发明包 括落入所附权利要求的范围内的全部修改、变型以及等同物。下面结合附图对本发明 的各种实施方式进行说明。 这些实施方式只是示例性的， 不是对本发明的限制。 The foregoing and other features of the invention will be apparent from the The specific embodiments of the present invention are disclosed in the specification and the drawings, which illustrate the embodiments in which the principles of the invention may be employed, it is understood that the invention is not limited to the described embodiments, but instead Invention package All modifications, variations and equivalents are intended to be included within the scope of the appended claims. Various embodiments of the present invention will be described below with reference to the accompanying drawings. These embodiments are merely exemplary and are not limiting of the invention.
在本发明实施例中，为了兼容只支持 540MHz带宽的设备，簇只在 540MHz信道 上建立。 工作带宽为 1.08GHz的网络控制节点需要同时加入两个重叠 540MHz信道 上的簇， 并按照簇规则分别在两个 540MHz信道上发送信标帧， 参与簇维护。  In the embodiment of the present invention, clusters are only established on the 540 MHz channel in order to be compatible with devices that only support 540 MHz bandwidth. A network control node with a working bandwidth of 1.08 GHz needs to join two clusters on the overlapping 540 MHz channel at the same time, and send beacon frames on two 540 MHz channels according to the cluster rule to participate in cluster maintenance.
下面结合附图对本发明实施例进行详细说明。  The embodiments of the present invention are described in detail below with reference to the accompanying drawings.
实施例 1  Example 1
本发明实施例 1提供了一种分布式的成簇方法， 图 3是该方法的流程图， 该方法 可以应用于网络中的控制节点， 例如 PCP (Personal basic service set Control Point, 个 人基本服务集控制点） 或者 AP (Access Point, 接入点）， 为了方便说明， 以下简称 为网络控制节点。 请参照图 3， 该方法包括：  Embodiment 1 of the present invention provides a distributed clustering method, and FIG. 3 is a flowchart of the method, which can be applied to a control node in a network, such as a PCP (Personal basic service set Control Point). Control point) or AP (Access Point), for convenience of explanation, hereinafter referred to as the network control node. Referring to Figure 3, the method includes:
步骤 301， 网络控制节点根据工作带宽确定工作信道；  Step 301: The network control node determines a working channel according to the working bandwidth.
在该步骤中， 如果该网络控制节点的工作带宽为 540MHz， 则该网络控制节点确 定其工作信道为 540MHz带宽的信道； 如果该网络控制节点的工作带宽为 1.08GHz， 则该网络控制节点确定其工作信道为 1.08GHz 带宽的信道。 具体的确定方式可以参 考现有技术， 这里不再赘述。  In this step, if the working bandwidth of the network control node is 540 MHz, the network control node determines a channel whose working channel is 540 MHz bandwidth; if the working bandwidth of the network control node is 1.08 GHz, the network control node determines its The working channel is a channel of 1.08 GHz bandwidth. The specific determination method can refer to the prior art, and details are not described herein again.
步骤 302， 所述网络控制节点根据确定的工作信道， 加入所述工作信道上的或者 与所述工作信道重叠的信道带宽比所述工作信道的信道带宽小的信道上的簇，或者在 所述工作信道上或者与所述工作信道重叠的信道带宽比所述工作信道的信道带宽小 的信道上建立簇。  Step 302: The network control node joins a cluster on a channel on the working channel or a channel bandwidth overlapping the working channel that is smaller than a channel bandwidth of the working channel according to the determined working channel, or in the Clusters are established on the working channel or on a channel having a channel bandwidth that overlaps the working channel that is smaller than the channel bandwidth of the working channel.
在一个实施方式中， 如果工作信道为第一类工作信道， 并且在该第一类工作信道 上还没有簇， 则所述网络控制节点在该第一类工作信道上建立簇。下面以该第一类工 作信道为 540MHz带宽的信道为例对该实施方式进行说明。  In one embodiment, if the working channel is a first type of working channel and there are no clusters on the first type of working channel, the network control node establishes a cluster on the first type of working channel. The following describes the embodiment by taking a channel of the first type of working channel as a bandwidth of 540 MHz as an example.
在本实施方式中， 如果工作带宽是 540MHz， 并且在工作信道上没有簇， 则该网 络控制节点可以在当前工作信道上建立簇。其中， 建立簇的操作包括： 确定簇控制信 息； 周期性发送包含簇控制信息的信标帧。  In the present embodiment, if the operating bandwidth is 540 MHz and there are no clusters on the working channel, the network control node can establish clusters on the current working channel. The operation of establishing a cluster includes: determining cluster control information; periodically transmitting a beacon frame including cluster control information.
图 4是本实施方式中簇控制信息的格式的一个实施方式的示意图， 如图 4所示， 在本实施方式中， 该簇控制信息可以包括： 簇 ID， 簇角色， 簇信道， 信标周期， 簇 支持的最大成员数， 信标调度时间长度等， 本实施例并不限制于此。 其中， 簇 ID指 示了该簇的标识， 用于区分不同的簇； 簇角色指示了该网络控制节点相对于该簇是什 么角色， 例如是同步控制节点还是成员， 在本实施方式中， 由于该簇是由该网络控制 节点建立起来的，因此，其簇角色为同步控制节点；簇信道为指示了建立该簇的信道， 例如在本实施方式中为 540MHz的信道；信标周期指示了信标帧发送的间隔，也即多 少时间发送一次信标帧；簇最大成员数指示了该网络控制节点建立起来的这个簇所允 许的最大成员数， 也即最多允许多少设备加入该簇； 信标调度时间长度指示了每个成 员发送各自的信标帧所需的时间长度。 4 is a schematic diagram of an embodiment of a format of cluster control information in the embodiment. As shown in FIG. 4, in the embodiment, the cluster control information may include: a cluster ID, a cluster role, a cluster channel, and a beacon period. The maximum number of members supported by the cluster, the length of the beacon scheduling time, and the like, and the embodiment is not limited thereto. Where cluster ID refers to The identifier of the cluster is used to distinguish different clusters; the cluster role indicates the role of the network control node relative to the cluster, such as a synchronization control node or a member. In this embodiment, the cluster is The network control node is established, and therefore, its cluster role is a synchronous control node; the cluster channel is a channel indicating the establishment of the cluster, for example, a channel of 540 MHz in the present embodiment; the beacon period indicates the interval at which the beacon frame is transmitted. , that is, how many times to send a beacon frame; the maximum number of members of the cluster indicates the maximum number of members allowed by the cluster established by the network control node, that is, the maximum number of devices allowed to join the cluster; the length of the beacon scheduling time indicates The length of time each member sends its own beacon frame.
在本实施方式中， 确定了簇控制信息以后， 即可周期性的发送包含该簇控制信息 的信标帧。  In the present embodiment, after the cluster control information is determined, the beacon frame including the cluster control information can be periodically transmitted.
图 5是本实施方式中工作带宽为 540MHz的网络控制节点建立簇的信标发送格式 示意图。如图 5所示，该网络控制设备在其工作信道的每个信标周期（Beacon Interval) 发送自己的信标帧 ΒΉ1， 其中， 在该信标帧 ΒΉ1中， 包含了该网络控制节点所确定 的簇控制信息。  FIG. 5 is a schematic diagram of a beacon transmission format for establishing a cluster by a network control node with a working bandwidth of 540 MHz in the embodiment. As shown in FIG. 5, the network control device sends its own beacon frame 每个1 in each beacon interval of its working channel, where the beacon frame ΒΉ1 includes the network control node determined by the network control node. Cluster control information.
在一个实施方式中， 如果工作信道为第一类工作信道， 并且在该第一类工作信 道上已经有簇， 则所述网络控制节点加入所述簇。 下面以该第一类工作信道为 540MHz带宽的信道为例对该实施方式进行说明。  In one embodiment, if the working channel is a first type of working channel and there are already clusters on the first type of working channel, the network controlling node joins the cluster. The following describes an embodiment in which the first type of working channel is a 540 MHz bandwidth channel.
在该实施方式中，如果网络控制节点工作在 540MHz带宽的信道上，且当前工作 信道上已有由其它网络控制节点建立起来的簇， 则该网络控制节点可以加入所述簇。 其中， 加入簇的操作包括： 监听信道接收簇控制信息； 根据信道监听结果， 选择空闲 的信标调度时间； 在所选信标调度时间进行周期性信标发送。  In this embodiment, if the network control node operates on a channel of 540 MHz bandwidth and there are already clusters established by other network control nodes on the current working channel, the network control node can join the cluster. The operation of joining the cluster includes: receiving the cluster control information by the listening channel; selecting the idle beacon scheduling time according to the channel monitoring result; and performing periodic beacon transmission at the selected beacon scheduling time.
在该实施方式中，网络控制节点可以通过监听该工作信道来等待接收簇的同步网 络控制节点发送信标帧， 从接收到的同步信标帧获得簇控制信息，然后根据该簇控制 信息与该工作信道上的簇同步， 并继续监听该工作信道一个信标周期， 从而选择一个 空闲的信标调度时间， 在该选择的信道调度时间周期性的发送其自己的信标， 由此加 入了该工作信道的簇。 其中， 关于簇控制信息、 信标周期、 信标调度时间等已经在前 面做了说明， 在此不再赘述。  In this embodiment, the network control node may wait for the synchronization network control node of the receiving cluster to send a beacon frame by listening to the working channel, obtain cluster control information from the received synchronization beacon frame, and then according to the cluster control information and the Cluster synchronization on the working channel, and continues to listen to a beacon period of the working channel, thereby selecting an idle beacon scheduling time, periodically transmitting its own beacon at the selected channel scheduling time, thereby joining the A cluster of working channels. The cluster control information, the beacon period, the beacon scheduling time, and the like have been previously described, and will not be described herein.
在一个实施方式中， 如果工作信道为第二类工作信道， 并且与该第二类工作信道 重叠的两个第一类信道上都没有簇，则所述网络控制节点分别在与该第二类工作信道 重叠的两个第一类信道上建立簇。 下面以该两个第一类工作信道为两个相邻连续的 高、 低 540MHz 带宽的信道、 与该两个第一类工作信道重叠的第二类工作信道为 1.08GHz带宽的信道为例对该实施方式进行说明。 In an embodiment, if the working channel is a second type of working channel, and there are no clusters on the two first type channels overlapping the second type of working channel, the network control node is respectively in the second class A cluster is established on two first type channels on which the working channels overlap. The two first type of working channels are two consecutive consecutive This embodiment will be described by taking a channel of a high and low 540 MHz bandwidth and a channel of a second type of working channel overlapping the two first type of working channels as a channel of 1.08 GHz bandwidth.
在该实施方式中， 如果工作信道为 1.08GHz, 且与工作信道重叠的两个 540MHz 信道上都没有簇， 网络控制节点需要在这两个 540MHz信道上分别建立簇。建立簇的 操作与前述类似， 包括： 确定簇控制信息， 周期性在重叠的两个 540MHz信道上发送 包含该簇控制信息的信标帧。  In this embodiment, if the working channel is 1.08 GHz and there are no clusters on the two 540 MHz channels overlapping the working channel, the network control node needs to establish clusters on the two 540 MHz channels, respectively. The operation of establishing a cluster is similar to the foregoing, including: determining cluster control information, periodically transmitting a beacon frame containing the cluster control information on two overlapping 540 MHz channels.
在本实施方式中， 与图 4所示的簇控制信息的内容类似， 新建的这两个簇的簇控 制信息中， 簇 ID都是该网络控制节点的地址； 簇角色都是簇同步控制节点， 簇信道 分别为与该 1.08GHz的信道重叠的高 540MHz信道和低 540MHz信道。 除此之外， 该簇控制信息还可以包括信标周期、簇最大成员数及信标调度时间长度等同步控制信 息，在本实施方式中， 该网络控制节点建立起来的这两个簇的该同步控制信息可以相 同， 也可以不同。  In this embodiment, similar to the content of the cluster control information shown in FIG. 4, in the cluster control information of the newly created clusters, the cluster ID is the address of the network control node; the cluster roles are cluster synchronization control nodes. The cluster channels are respectively a high 540 MHz channel and a low 540 MHz channel overlapping the 1.08 GHz channel. In addition, the cluster control information may further include synchronization control information such as a beacon period, a maximum number of cluster members, and a beacon scheduling time length. In this embodiment, the network control node establishes the two clusters. The synchronization control information may be the same or different.
图 6是本实施方式中工作带宽为 1.08GHz的网络控制节点建立簇的信标发送格 式示意图。 如图 6所示， 相邻两个高、 低 540MHz信道上的簇以同一网络控制节点 PCP/AP作为簇同步控制节点， 该网络控制节点分别在重叠的这两个高、 低 540MHz 信道上周期性的发送包含各自的上述簇控制信息的信标帧 ΒΉ1， 并进行数据调度， 这里数据调度的方法可采用现有技术， 此处不再赘述。  6 is a schematic diagram of a beacon transmission format in which a network control node with a working bandwidth of 1.08 GHz establishes a cluster in the present embodiment. As shown in FIG. 6, the clusters on two adjacent high and low 540 MHz channels use the same network control node PCP/AP as the cluster synchronization control node, and the network control nodes respectively cycle on the overlapping two high and low 540 MHz channels. The beacon frame 包含1 including the above-mentioned cluster control information is sent and the data is scheduled. The data scheduling method can be used in the prior art, and details are not described herein again.
在本实施方式中， 这两个簇在建立时， 其各自的同步信息可以相同也可以不同， 如果相同，则在这两个簇建立之后， 随着两个 540MHz带宽的信道上网络数目及业务 量的变换， 同步控制节点可以根据需求改变这两个簇的信标周期、支持的最大簇成员 数目等同步信息， 则两个簇不再相互同步。在这两个簇不同步的情况下， 建立这两个 簇的同步控制节点需要维护两个信标周期，并分别按照这两个簇的同步信息在这两个 540MHz带宽的信道上发送信标帧。  In this embodiment, when the two clusters are established, their respective synchronization information may be the same or different. If they are the same, after the two clusters are established, the number of networks and services on the channel with two 540 MHz bandwidths The amount of transformation, the synchronization control node can change the beacon period of the two clusters, the maximum number of cluster members supported, and the like according to the requirements, and the two clusters are no longer synchronized with each other. In the case that the two clusters are not synchronized, the synchronization control node establishing the two clusters needs to maintain two beacon periods, and respectively send beacons on the two 540 MHz bandwidth channels according to the synchronization information of the two clusters. frame.
在一个实施方式中， 如果工作信道为第二类工作信道， 并且与该第二类工作信道 重叠的一个第一类信道上没有簇， 另一个第一类信道上有簇， 则所述网络控制节点加 入有簇的所述第一类信道上的簇， 并在没有簇的所述第一类信道上建立簇。下面以该 有簇的第一类工作信道为高 540MHz 带宽的信道、 没有簇的第一类工作信道为低 540MHz带宽的信道、该第二类工作信道为 1.08GHz带宽工作信道为例对该实施方式 进行说明。 在该实施方式中， 如果工作信道为 1.08GHz， 且与该工作信道重叠的低 540MHz 信道上没有簇， 相邻的重叠的高 540MHz 信道上有簇， 则网络控制节点加入该高 540MHz信道的已有簇， 作为簇成员； 并在该低 540MHz信道建立新簇， 作为该新建 的簇的同步控制节点。 In an embodiment, if the working channel is a second type of working channel, and there is no cluster on one of the first type of channels overlapping the second type of working channel, and there is a cluster on the other first type of channel, the network control A node joins a cluster on the first type of channel with clusters and establishes a cluster on the first type of channel without clusters. The following is a case where the clustered first type working channel is a channel with a high 540 MHz bandwidth, the first type of working channel without a cluster is a channel with a low 540 MHz bandwidth, and the second type of working channel is a 1.08 GHz bandwidth working channel. The way to explain. In this embodiment, if the working channel is 1.08 GHz, and there is no cluster on the low 540 MHz channel overlapping the working channel, and there are clusters on the adjacent overlapping high 540 MHz channel, the network control node joins the high 540 MHz channel. There is a cluster, as a cluster member; and a new cluster is established on the low 540 MHz channel as a synchronous control node of the newly created cluster.
在本实施方式中，对于加入该高 540MHz信道的过程与前述类似，在此不再赘述。 在本实施方式中， 对于在低 540MHz信道上建立的簇的过程也与前述类似， 其中， 在 低 540MHz信道建立新簇时， 在确定的簇控制信息中， 簇 ID是该网络控制节点的地 址， 簇角色为同步控制节点， 簇信道为对应的低 540MHz信道； 此外， 该簇控制信息 还可以包含信标周期、 簇最大成员数、 信标调度时间长度等同步信息， 该同步信息可 以与高 540MHz信道上的已有簇的同步信息相同， 也可以不同。  In the present embodiment, the process of joining the high 540 MHz channel is similar to the foregoing, and details are not described herein again. In the present embodiment, the process for clusters established on a low 540 MHz channel is similar to the foregoing, wherein when a new cluster is established on a low 540 MHz channel, in the determined cluster control information, the cluster ID is the address of the network control node. The cluster role is a synchronous control node, and the cluster channel is a corresponding low 540 MHz channel. In addition, the cluster control information may further include synchronization information such as a beacon period, a maximum number of cluster members, and a beacon scheduling time length, and the synchronization information may be high. The synchronization information of existing clusters on the 540 MHz channel is the same or different.
图 7是本实施方式中高 540MHz的信道（已有簇）与低 540MHz的信道（新建簇） 的信标发送格式示意图，如图 7所示，该高 540MHz的信道和该低 540MHz的信道与 本实施例的网络控制节点 （PCP/AP) 的工作信道 （1.08GHz的信道） 重叠。  7 is a schematic diagram of a beacon transmission format of a channel of 540 MHz high (existing cluster) and a channel of low 540 MHz (new cluster) in the present embodiment, as shown in FIG. 7, the channel of 540 MHz high and the channel of the low 540 MHz The working channel (1.08 GHz channel) of the network control node (PCP/AP) of the embodiment overlaps.
其中， 由于该高 540MHz信道上已经有簇了， 则该 PCP/AP可以直接加入该高 540MHz信道上的已有簇， 并在自己选择的信标调度时间 （如图 7所示的每个信标周 期的 offset (偏移） =2内的信标调度时间）周期性的发送包含其簇控制信息的信标帧 BTI2, 其中， 该簇控制信息所对应的簇为该高 540MHz信道上的已有的簇。  Wherein, since there are already clusters on the high 540 MHz channel, the PCP/AP can directly join the existing cluster on the high 540 MHz channel, and at the beacon scheduling time of its own selection (as shown in Figure 7 for each letter) The beacon scheduling time in the offset period (offset) = 2) periodically transmits a beacon frame BTI2 including its cluster control information, where the cluster corresponding to the cluster control information is already on the high 540 MHz channel There are clusters.
其中， 由于该低 540MHz信道上还没有簇， 则该 PCP/AP可以在该低 540MHz上 建立一个新的簇， 并在自己确定的信标调度时间 （如图 7 所示的每个信标周期的 oflfset=l内的信标调度时间）周期性发送包含其簇控制信息的信标帧 BTI2， 其中， 该 簇控制信息所对应的簇为该低 540MHz信道上的新建的簇。在本实施方式中，该网络 控制节点在低 540MHz信道上所选择的信标调度时间与高 540MHz信道相同，但本实 施例并不以此作为限制，在其它实施方式中，该网络控制节点在低 540MHz信道上所 选择的信标调度时间也可以与高 540MHz不同，例如选择其它空闲的信标调度时间作 为其自己的信标调度时间。  Wherein, since there is no cluster on the low 540 MHz channel, the PCP/AP can establish a new cluster at the lower 540 MHz, and at the beacon scheduling time determined by itself (each beacon period as shown in FIG. 7) The beacon scheduling time in the oflfset=l) periodically transmits a beacon frame BTI2 including its cluster control information, wherein the cluster corresponding to the cluster control information is a newly created cluster on the low 540 MHz channel. In this embodiment, the network control node selects the same beacon scheduling time on the low 540 MHz channel as the high 540 MHz channel, but this embodiment is not limited thereto. In other embodiments, the network control node is in the network control node. The selected beacon scheduling time on the low 540 MHz channel can also be different from the high 540 MHz, such as selecting other idle beacon scheduling times as its own beacon scheduling time.
在本实施方式中， 新建簇与已有簇可以同步也可以不同步， 然而， 随着两个信道 上网络数目及业务量的变换， 两个簇的同步控制节点可以根据需求改变簇的信标周 期、支持的最大簇成员数目等同步信息。改变同步信息后，上述两个簇可能不再同步。 两簇不同步情况下， 同时属于两个簇的网络控制节点需要维护两个信标周期， 并分别 按照两个簇的同步信息在两个信道上发送信标帧。 In this embodiment, the newly created cluster and the existing cluster may be synchronized or not synchronized. However, as the number of networks and the amount of traffic on the two channels are changed, the synchronization control nodes of the two clusters may change the beacon of the cluster according to requirements. Synchronization information such as the period, the maximum number of cluster members supported, and so on. After changing the synchronization information, the above two clusters may no longer be synchronized. When two clusters are out of synchronization, the network control nodes belonging to both clusters need to maintain two beacon periods and respectively The beacon frame is transmitted on the two channels in accordance with the synchronization information of the two clusters.
在一个实施方式中， 如果工作信道为第二类工作信道， 并且与该第二类工作信道 重叠的两个第一类信道上都有簇，则所述网络控制节点分别加入与该第二类工作信道 重叠的两个第一类信道上的簇。 下面以该第一类工作信道为两个相邻连续的高、 低 540MHz带宽的信道、该第二类工作信道为 1.08GHz带宽的信道为例对该实施方式进 行说明。  In an embodiment, if the working channel is a second type of working channel, and the two first types of channels overlapping the second type of working channel have clusters, the network control node respectively joins the second class. A cluster on two first type channels on which the working channel overlaps. The following is an example in which the first type of working channel is two adjacent consecutive high and low 540 MHz bandwidth channels, and the second type of working channel is 1.08 GHz bandwidth channel.
在该实施方式中， 如果该网络控制节点的工作带宽为 1.08GHz, 且与其工作信道 重叠的两个高、低 540MHz信道上都已有簇， 则网络控制节点需要加入这两个高、低 540MHz带宽的信道上的簇。 分别监听这两个高、 低 540MHz带宽的信道， 等待接收 这两个信道上的簇的同步控制节点发送的信标帧。从接收到的信标帧中获得簇控制信 息。在这两个高、 低 540MHz信道上分别与这两个已有簇进行同步， 例如， 分别选择 一个空闲的信标调度时间， 进行周期性信标发送。  In this embodiment, if the network control node has an operating bandwidth of 1.08 GHz and there are clusters on the two high and low 540 MHz channels overlapping the working channel, the network control node needs to join the two high and low 540 MHz. A cluster on a channel of bandwidth. The two high and low 540 MHz bandwidth channels are separately monitored, and the beacon frames transmitted by the synchronization control nodes of the clusters on the two channels are awaiting reception. Cluster control information is obtained from the received beacon frame. The two existing clusters are synchronized on the two high and low 540 MHz channels respectively, for example, an idle beacon scheduling time is selected to perform periodic beacon transmission.
在本实施方式中， 如果网络控制节点支持 OFDM, 则该网络控制节点加入上述 两个簇的过程可以同时进行； 如果网络控制节点不支持 OFDM, 则该网络控制节点 加入这两个簇的过程需要分时， 完成一个簇的加入之后再尝试加入另一个簇。  In this embodiment, if the network control node supports OFDM, the process of adding the network control node to the two clusters may be performed simultaneously; if the network control node does not support OFDM, the process of joining the network control node to the two clusters is required. Time-sharing, after joining a cluster, try to join another cluster.
图 8 是本实施方式中工作信道为 1.08GHz 带宽的网络控制节点加入两个重叠 540MHz 信道上的簇之后信标发送的格式示意图， 如图 8 所示， 该网络控制节点 (PCP/AP) 分别监听这两个高、 低 540MHz信道， 接收这两个信道上的簇的同步控 制节点发送的信标帧， 根据接收到的信标帧在各个信道上选择空闲的信标调度时间， 周期性的在高、 低 540MHz信道上分别发送包含各自的簇控制信息的信标帧 BTB。 如图 8所示，该网络控制节点在高 540MHz的信道上所选择的空闲的信标调度时间为 oflfset=3内的信标调度时间， 在低 540MHz的信道上所选择的空闲的信标调度时间为 oflfset=3内的信标调度时间， 则其周期性的分别在该所述两个信标调度时间发送其信 标帧。  8 is a schematic diagram of a format of beacon transmission after a network control node whose working channel is 1.08 GHz bandwidth joins two clusters on an overlapping 540 MHz channel in the embodiment, as shown in FIG. 8, the network control node (PCP/AP) respectively Listening to the two high and low 540MHz channels, receiving beacon frames sent by the synchronization control node of the clusters on the two channels, selecting idle beacon scheduling time on each channel according to the received beacon frame, periodic A beacon frame BTB containing respective cluster control information is transmitted on the high and low 540 MHz channels, respectively. As shown in FIG. 8, the idle beacon scheduling time selected by the network control node on the high 540 MHz channel is the beacon scheduling time within oflfset=3, and the idle beacon scheduling selected on the low 540 MHz channel. The time is the beacon scheduling time within oflfset=3, and then it periodically transmits its beacon frame at the two beacon scheduling times.
在本实施方式中，相邻两个高、低 540MHz带宽的信道上的两个已有簇的同步信 标发送时间、信标周期及簇最大成员数等控制信息可能不一样， 即两个簇同步信息不 一致， 则工作信道为 1.08GHz 的网络控制节点需要维护两个信标周期， 分别在两个 高、 低 540MHz信道上按照不同的簇同步规则进行周期性信标帧发送。  In this embodiment, control information such as synchronization beacon transmission time, beacon period, and maximum number of cluster members of two existing clusters on two adjacent high and low 540 MHz bandwidth channels may be different, that is, two clusters. If the synchronization information is inconsistent, the network control node with the working channel of 1.08 GHz needs to maintain two beacon periods, and perform periodic beacon frame transmission according to different cluster synchronization rules on the two high and low 540 MHz channels respectively.
在以上的说明中， 是以第一类工作信道为 540MHz 带宽的信道， 第二类信道为 1.08GHz带宽的信道为例， 但本实施例并不以此作为限制， 根据 45GHz频段的信道 划分方式的不同， 该第一类信道和该第二类信道的带宽也可以是其它带宽， 只要第二 类工作信道与第一类工作信道有重叠即可。 例如， 第一类工作信道也可以是 270MHz 带宽的信道， 第二类工作信道也可以是与两个 270MHz 带宽的信道重叠的 540MHz 带宽的信道等。 In the above description, the first type of working channel is a channel of 540 MHz bandwidth, and the second type of channel is The channel of the 1.08 GHz bandwidth is taken as an example, but the present embodiment is not limited thereto. According to the channel division manner of the 45 GHz band, the bandwidth of the first type channel and the second type channel may also be other bandwidths. The second type of working channel may overlap with the first type of working channel. For example, the first type of working channel may also be a 270 MHz bandwidth channel, and the second type of working channel may also be a 540 MHz bandwidth channel overlapping with two 270 MHz bandwidth channels.
通过本实施例的方法， 解决了主副信道 MAC框架下成簇的问题， 能够适应动态 选择工作信道的多网络并存， 并避免并存网络之间的控制信息传输干扰。  Through the method of the embodiment, the problem of clustering under the MAC framework of the primary and secondary channels is solved, and the multi-network coexistence of dynamically selecting the working channel can be accommodated, and the interference of control information transmission between the coexisting networks is avoided.
在本实施例中， 如果工作信道为上述第二类工作信道， 则所述网络控制节点需要 在与所述第二类工作信道重叠的两个第一类工作信道上分别发送信标帧。如果这两个 第一类工作信道上所述网络控制节点的信标调度时间相同，如图 6或图 7所示的情况， 则该网络控制节点可以分时或同时发送两个所述信标帧。 具体的：  In this embodiment, if the working channel is the second type of working channel, the network control node needs to separately send a beacon frame on two first type of working channels overlapping the second type of working channel. If the beacon scheduling time of the network control node on the two first type working channels is the same, as shown in FIG. 6 or FIG. 7, the network control node may send the two beacons in a time-sharing manner or simultaneously. frame. specific:
在一个实施方式中，如果所述网络控制节点不支持正交频分复用（OFDM)技术， 则所述网络控制节点可以以时分的方式在与所述第二类工作信道重叠的两个第一类 信道上发送所述信标帧。 如图 9所示。  In an embodiment, if the network control node does not support orthogonal frequency division multiplexing (OFDM) technology, the network control node may overlap in time division with two of the second type of working channels. The beacon frame is transmitted on a type of channel. As shown in Figure 9.
在另一个实施方式中，如果所述网络控制节点支持正交频分复用（OFDM)技术， 则所述网络控制节点可以同时在与所述第二类工作信道重叠的两个第一类信道上发 送两个所述信标帧。 如图 10所示。 在该实施方式中， 由于并行发送信标帧， 因此信 标帧发送效率更高。  In another embodiment, if the network control node supports orthogonal frequency division multiplexing (OFDM) technology, the network control node may simultaneously simultaneously overlap two first type channels with the second type of working channel. Two of the beacon frames are transmitted on. As shown in Figure 10. In this embodiment, since the beacon frame is transmitted in parallel, the beacon frame transmission efficiency is higher.
通过本发明的上述实施例中的成簇方法， 协调了信标帧的传输， 从而降低了信标 帧传输的干扰。 同时能够灵活性地支持多种工作信道带宽选择， 从而提高了系统吞吐 量及信道利用率。 实施例 2  By the clustering method in the above embodiment of the present invention, the transmission of the beacon frame is coordinated, thereby reducing the interference of the beacon frame transmission. At the same time, it can flexibly support multiple working channel bandwidth selections, thereby increasing system throughput and channel utilization. Example 2
本发明实施例还提供了一种分布式的成簇装置， 该装置应用于网络控制节点， 由 于该分布式的成簇装置解决问题的原理与实施例 1的方法类似， 因此，其具体的实施 可以参照实施例 1的方法的实施， 内容相同之处不再重复说明。  The embodiment of the invention further provides a distributed clustering device, which is applied to a network control node, and the principle of solving the problem by the distributed cluster device is similar to the method of the embodiment 1, and therefore, the specific implementation thereof The implementation of the method of Embodiment 1 can be referred to, and the description of the same portions will not be repeated.
图 11是该分布式的成簇装置的构成示意图， 请参照图 11， 该分布式的成簇装置 包括：  Figure 11 is a schematic diagram showing the structure of the distributed clustering device. Referring to Figure 11, the distributed clustering device includes:
第一确定单元 111， 其根据所述网络控制节点的工作带宽确定所述网络控制节点 的工作信道， a first determining unit 111, configured to determine the network control node according to an operating bandwidth of the network control node Working channel,
成簇单元 112， 其根据第一确定单元确定的所述网络控制节点的工作信道， 加入 所述工作信道上的或者与所述工作信道重叠的信道带宽比所述工作信道的信道带宽 小的信道上的簇，或者在所述工作信道上或者与所述该工作信道重叠的信道带宽比所 述工作信道的信道带宽小的信道上建立簇。  a clustering unit 112, according to the working channel of the network control node determined by the first determining unit, adding a channel having a channel bandwidth on the working channel or overlapping the working channel and having a smaller channel bandwidth than the working channel The cluster above, or clusters are established on the working channel or on a channel whose channel bandwidth overlaps with the working channel is smaller than the channel bandwidth of the working channel.
在本实施例的一个实施方式中， 所述成簇单元 112包括：  In an embodiment of the embodiment, the clustering unit 112 includes:
第一处理单元 1121， 其在所述网络控制节点的工作信道为第一类工作信道， 并 且在该第一类工作信道上已经有簇时， 加入所述簇。  The first processing unit 1121 is configured to join the cluster when the working channel of the network control node is a first type of working channel, and when there is already a cluster on the first type of working channel.
在本实施例的另一个实施方式中， 所述成簇单元 112包括：  In another embodiment of the embodiment, the clustering unit 112 includes:
第二处理单元 1122， 其在所述网络控制节点的工作信道为第一类工作信道， 并 且在该第一类工作信道上还没有簇时， 在该第一类工作信道上建立簇。  The second processing unit 1122 establishes a cluster on the first type of working channel when the working channel of the network control node is a first type of working channel, and when there is no cluster on the first type of working channel.
在本实施例的另一个实施方式中， 所述成簇单元 112包括：  In another embodiment of the embodiment, the clustering unit 112 includes:
第三处理单元 1123， 其在所述网络控制节点的工作信道为第二类工作信道， 并 且与该第二类工作信道重叠的两个第一类信道上都没有簇时，分别在与该第二类工作 信道重叠的两个第一类信道上建立簇。  a third processing unit 1123, when the working channel of the network control node is a second type of working channel, and when there are no clusters on the two first type channels overlapping the second type of working channel, respectively A cluster is established on two first type channels in which the two types of working channels overlap.
在本实施例的另一个实施方式中， 所述成簇单元 112包括：  In another embodiment of the embodiment, the clustering unit 112 includes:
第四处理单元 1124， 其在所述网络控制节点的工作信道为第二类工作信道， 并 且与该第二类工作信道重叠的一个第一类信道上没有簇， 另一个第一类信道上有簇 时， 加入有簇的所述第一类信道上的簇， 并在没有簇的所述第一类信道上建立簇。  The fourth processing unit 1124, the working channel of the network control node is a second type of working channel, and there is no cluster on a first type of channel overlapping the second type of working channel, and the other type of channel has At the time of clustering, clusters on the first type of channel having clusters are added, and clusters are established on the first type of channels without clusters.
在本实施例的另一个实施方式中， 所述成簇单元 112包括：  In another embodiment of the embodiment, the clustering unit 112 includes:
第五处理单元 1125， 其在所述网络控制节点的工作信道为第二类工作信道， 并 且与该第二类工作信道重叠的两个第一类信道上都有簇时，分别加入与该第二类工作 信道重叠的两个第一类信道上的簇。  a fifth processing unit 1125, when the working channel of the network control node is a second type of working channel, and when there are clusters on the two first type channels overlapping the second type of working channel, respectively A cluster on two first type channels on which the second type of working channel overlaps.
在本实施例的一个实施方式中， 所述成簇单元 112包括：  In an embodiment of the embodiment, the clustering unit 112 includes:
发送单元 1126， 其在所述网络控制节点的工作信道为第二类工作信道时， 在与 所述第二类工作信道重叠的两个第一类信道上分别发送信标帧。  The sending unit 1126, when the working channel of the network control node is the second type of working channel, respectively transmits a beacon frame on the two first type channels overlapping with the second type of working channel.
其中，如果与所述第二类工作信道重叠的两个第一类信道上所述网络控制节点的 信标调度时间相同， 并且所述网络控制节点不支持正交频分复用 （OFDM)技术， 则 所述发送单元以时分的方式在与所述第二类工作信道重叠的两个第一类信道上发送 所述信标帧；如果与所述第二类工作信道重叠的两个第一类信道上所述网络控制节点 的信标调度时间相同， 并且所述网络控制节点支持正交频分复用 （OFDM)技术， 则 所述发送单元同时在与所述第二类工作信道重叠的两个第一类信道上发送所述信标 帧。 Wherein, if the network control node has the same beacon scheduling time on the two first type channels overlapping the second type of working channel, and the network control node does not support orthogonal frequency division multiplexing (OFDM) technology Transmitting, in a time division manner, on two first type channels overlapping the second type of working channel The beacon frame; if the beacon scheduling time of the network control node is the same on two first type channels overlapping the second type of working channel, and the network control node supports orthogonal frequency division multiplexing ( In the OFDM technique, the transmitting unit simultaneously transmits the beacon frame on two first type channels overlapping the second type of working channel.
通过本发明的上述实施例中的成簇装置， 协调了信标帧的传输， 从而降低了信标 帧传输的干扰。 同时能够灵活性地支持多种工作信道带宽选择， 从而提高了系统吞吐 量及信道利用率。 实施例 3  With the clustering apparatus in the above embodiment of the present invention, the transmission of the beacon frame is coordinated, thereby reducing the interference of the beacon frame transmission. At the same time, it can flexibly support multiple working channel bandwidth selections, thereby increasing system throughput and channel utilization. Example 3
本发明实施例 3提供一种网络控制节点，该网络控制节点包括如实施例 2所述的 分布式的成簇装置。  Embodiment 3 of the present invention provides a network control node including the distributed clustering device as described in Embodiment 2.
图 12是本发明实施例的网络控制节点的构成示意图。如图 12所示， 网络控制节 点 1200可以包括： 中央处理器 （CPU) 1220和存储器 1210; 存储器 1210耦合到中 央处理器 1220。 其中该存储器 1210可存储各种数据； 此外还存储信息处理的程序， 并且在中央处理器 1220的控制下执行该程序， 以接收网络中其他节点发送的各种信 息。  FIG. 12 is a schematic diagram showing the structure of a network control node according to an embodiment of the present invention. As shown in FIG. 12, network control node 1200 can include: a central processing unit (CPU) 1220 and memory 1210; and memory 1210 coupled to central processor 1220. The memory 1210 can store various data; in addition, a program for information processing is stored, and the program is executed under the control of the central processing unit 1220 to receive various information transmitted by other nodes in the network.
在一个实施方式中，分布式的成簇装置的功能可以被集成到中央处理器 1220中。 其中， 中央处理器 1220可以被配置为： 根据工作带宽确定工作信道， 根据确定的工 作信道，加入所述工作信道上的或者与所述工作信道重叠的信道带宽比所述工作信道 的信道带宽小的信道上的簇，或者在所述工作信道上或者与所述该工作信道重叠的信 道带宽比所述工作信道的信道带宽小的信道上建立簇。  In one embodiment, the functionality of the distributed clustering device can be integrated into the central processor 1220. The central processing unit 1220 may be configured to: determine, according to the working bandwidth, a working channel, according to the determined working channel, a channel bandwidth that is added to the working channel or overlaps with the working channel is smaller than a channel bandwidth of the working channel. Clusters on the channel, or clusters on the working channel or on a channel having a channel bandwidth that overlaps with the working channel that is smaller than the channel bandwidth of the working channel.
中央处理器 1220还可以被配置为： 如果工作信道为第一类工作信道， 并且在该 第一类工作信道上已经有簇， 则加入所述簇。  The central processor 1220 can also be configured to: if the working channel is a first type of working channel and there are already clusters on the first type of working channel, then the cluster is added.
中央处理器 1220还可以被配置为： 如果工作信道为第一类工作信道， 并且在该 第一类工作信道上还没有簇， 则在该第一类工作信道上建立簇。  The central processor 1220 can also be configured to: establish a cluster on the first type of working channel if the working channel is a first type of working channel and there are no clusters on the first type of working channel.
中央处理器 1220还可以被配置为： 如果工作信道为第二类工作信道， 并且与该 第二类工作信道重叠的两个第一类信道上都没有簇，则分别在与该第二类工作信道重 叠的两个第一类信道上建立簇。  The central processing unit 1220 may be further configured to: if the working channel is a second type of working channel, and there are no clusters on the two first type channels overlapping the second type of working channel, respectively working with the second type Clusters are established on the two first type channels on which the channels overlap.
中央处理器 1220还可以被配置为： 如果工作信道为第二类工作信道， 并且与该 第二类工作信道重叠的一个第一类信道上没有簇， 另一个第一类信道上有簇， 则所述 加入有簇的所述第一类信道上的簇， 并在没有簇的所述第一类信道上建立簇。 The central processing unit 1220 can also be configured to: if the working channel is a second type of working channel, and If there is no cluster on a first type of channel in which the second type of working channel overlaps, and there is a cluster on the other type of channel, the cluster on the first type of channel to which the cluster is added, and in the case where there is no cluster Clusters are established on the first type of channel.
中央处理器 1220还可以被配置为： 如果工作信道为第二类工作信道， 并且与该 第二类工作信道重叠的两个第一类信道上都有簇，则分别加入与该第二类工作信道重 叠的两个第一类信道上的簇。  The central processing unit 1220 is further configured to: if the working channel is a second type of working channel, and the two first type channels overlapping the second type of working channel have clusters, respectively, join the second type of work A cluster on two first type channels on which the channels overlap.
中央处理器 1220还可以被配置为： 如果工作信道为第二类工作信道， 则在与所 述第二类工作信道重叠的两个第一类信道上分别发送信标帧。  The central processor 1220 can also be configured to: if the working channel is a second type of working channel, transmit a beacon frame on each of the two first type of channels that overlap the second type of working channel.
其中，在与所述第二类工作信道重叠的两个第一类工作信道上所述网络控制节点 的信标调度时间相同时，如果所述网络控制节点不支持正交频分复用（OFDM)技术， 则所述中央处理器 1220可以被配置为： 以时分的方式在与所述第二类工作信道重叠 的两个第一类信道上发送所述信标帧； 如果所述网络控制节点支持正交频分复用 (OFDM) 技术， 则所述中央处理器 1220还可以被配置为： 同时在与所述第二类工 作信道重叠的两个第一类信道上发送所述信标帧。  Wherein, when the beacon scheduling times of the network control nodes are the same on the two first type of working channels overlapping the second type of working channel, if the network control node does not support orthogonal frequency division multiplexing (OFDM) The central processor 1220 can be configured to: transmit the beacon frame on two first type channels overlapping the second type of working channel in a time division manner; if the network control node Supporting orthogonal frequency division multiplexing (OFDM) techniques, the central processor 1220 can be further configured to: simultaneously transmit the beacon frame on two first type channels overlapping the second type of working channel .
在另一个实施方式中， 分布式的成簇装置可以与中央处理器 1220分开配置， 例 如可以将分布式的成簇装置配置为与中央处理器 1220连接的芯片， 通过中央处理器 1220的控制来实现分布式的成簇装置的功能。  In another embodiment, the distributed clustering device can be configured separately from the central processing unit 1220. For example, the distributed clustering device can be configured as a chip connected to the central processing unit 1220, controlled by the central processing unit 1220. Implement the functions of a distributed cluster device.
此外，如图 12所示， 网络控制节点 1200还可以包括：传感器 1201、收发器 1204 和电源模块 1205等； 其中， 上述部件的功能与现有技术类似， 此处不再赘述。 值得 注意的是， 网络控制节点 1200也并不是必须要包括图 12中所示的所有部件； 此外， 网络控制节点 1200还可以包括图 12中没有示出的部件， 可以参考现有技术。  In addition, as shown in FIG. 12, the network control node 1200 may further include: a sensor 1201, a transceiver 1204, a power module 1205, and the like. The functions of the foregoing components are similar to those of the prior art, and are not described herein again. It is to be noted that the network control node 1200 does not have to include all of the components shown in FIG. 12; in addition, the network control node 1200 may also include components not shown in FIG. 12, and reference may be made to the prior art.
通过本发明的上述实施例中的网络控制节点， 协调了信标帧的传输， 从而降低了 信标帧传输的干扰。 同时能够灵活性地支持多种工作信道带宽选择， 从而提高了系统 吞吐量及信道利用率。 实施例 4  Through the network control node in the above embodiment of the present invention, the transmission of the beacon frame is coordinated, thereby reducing the interference of the beacon frame transmission. At the same time, it can flexibly support multiple working channel bandwidth selections, thereby improving system throughput and channel utilization. Example 4
本发明实施例还提供一种网络系统， 其中， 该网络系统包括至少一个如实施例 3 所述的网络控制节点。  The embodiment of the present invention further provides a network system, where the network system includes at least one network control node as described in Embodiment 3.
由于在实施例 3中， 已经对该网络控制节点做了详细说明， 其内容被合并于此， 此处不再赘述。 通过本发明的上述实施例中的网络系统， 协调了信标帧的传输， 从而降低了信标 帧传输的干扰。 同时能够灵活性地支持多种工作信道带宽选择， 从而提高了系统吞吐 量及信道利用率。 Since the network control node has been described in detail in Embodiment 3, the content thereof is incorporated herein, and details are not described herein again. Through the network system in the above embodiment of the present invention, the transmission of the beacon frame is coordinated, thereby reducing the interference of the beacon frame transmission. At the same time, it can flexibly support multiple working channel bandwidth selections, thereby improving system throughput and channel utilization.
本发明实施例还提供一种计算机可读程序，其中当在分布式的成簇装置或网络控 制节点中执行所述程序时，所述程序使得计算机在所述分布式的成簇装置或网络控制 节点中执行实施例 1所述的分布式的成簇方法。  Embodiments of the present invention also provide a computer readable program, wherein when the program is executed in a distributed cluster device or a network control node, the program causes the computer to be in the distributed cluster device or network control The distributed clustering method described in Embodiment 1 is performed in the node.
本发明实施例还提供一种存储有计算机可读程序的存储介质，其中所述计算机可 读程序使得计算机在分布式的成簇装置或网络控制节点中执行实施例 1 所述的分布 式的成簇方法。  Embodiments of the present invention also provide a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute the distributed implementation described in Embodiment 1 in a distributed clustering device or a network control node. Cluster method.
本发明以上的装置和方法可以由硬件实现， 也可以由硬件结合软件实现。本发明 涉及这样的计算机可读程序， 当该程序被逻辑部件所执行时， 能够使该逻辑部件实现 上文所述的装置或构成部件， 或使该逻辑部件实现上文所述的各种方法或步骤。逻辑 部件例如现场可编程逻辑部件、微处理器、计算机中使用的处理器等。本发明还涉及 用于存储以上程序的存储介质， 如硬盘、 磁盘、 光盘、 DVD、 flash存储器等。  The above apparatus and method of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software. The present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps. Logic components such as field programmable logic components, microprocessors, processors used in computers, and the like. The present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.
以上结合具体的实施方式对本发明进行了描述，但本领域技术人员应该清楚， 这 些描述都是示例性的， 并不是对本发明保护范围的限制。本领域技术人员可以根据本 发明的精神和原理对本发明做出各种变型和修改，这些变型和修改也在本发明的范围 内。  The present invention has been described in connection with the specific embodiments thereof, and it should be understood by those skilled in the art that these descriptions are not intended to limit the scope of the invention. A person skilled in the art can make various modifications and changes to the invention in accordance with the spirit and the principles of the invention, which are also within the scope of the invention.

Claims

权 利 要 求 书 claims
1、 一种分布式的成簇方法， 其中， 所述方法包括： 1. A distributed clustering method, wherein the method includes:
网络控制节点根据工作带宽确定工作信道， The network control node determines the working channel based on the working bandwidth,
所述网络控制节点根据确定的工作信道，加入所述工作信道上的或者与所述工作 信道重叠的信道带宽比所述工作信道的信道带宽小的信道上的簇，或者在所述工作信 道上或者与所述工作信道重叠的信道带宽比所述工作信道的信道带宽小的信道上建 The network control node, according to the determined working channel, joins a cluster on the working channel or a channel whose channel bandwidth overlaps with the working channel is smaller than the channel bandwidth of the working channel, or on the working channel Or the channel bandwidth overlapping with the working channel is smaller than the channel bandwidth of the working channel.
2、 根据权利要求 1所述的方法， 其中， 2. The method according to claim 1, wherein,
如果工作信道为第一类工作信道， 并且在该第一类工作信道上已经有簇， 则所述 网络控制节点加入所述簇。 If the working channel is a first-type working channel, and there is already a cluster on the first-type working channel, the network control node joins the cluster.
3、 根据权利要求 1所述的方法， 其中， 3. The method according to claim 1, wherein,
如果工作信道为第一类工作信道， 并且在该第一类工作信道上还没有簇， 则所述 网络控制节点在该第一类工作信道上建立簇。 If the working channel is a first-type working channel, and there is no cluster on the first-type working channel, the network control node establishes a cluster on the first-type working channel.
4、 根据权利要求 1所述的方法， 其中， 4. The method according to claim 1, wherein,
如果工作信道为第二类工作信道，并且与该第二 ：类工作信道重叠的两个第一类信 道上都没有簇，则所述网络控制节点分别在与该第二：类工作信道重叠的两个第一类信 道上建立簇。 If the working channel is a second type working channel, and there are no clusters on the two first type channels that overlap with the second type working channel, the network control node will respectively Clusters are established on two first-class channels.
5、 根据权利要求 1所述的方法， 其中， 5. The method according to claim 1, wherein,
'、 _- 如果工作信道为第二类工作信道，并且与该第二类工作信道重叠的一个第一类 f 道上没有簇， 另一个第一类信道上有簇， 则所述网络控制节点加入有簇的所述第一类 信道上的簇， 并在没有簇的所述第一类信道上建立簇。 ', _- If the working channel is a second type working channel, and there is no cluster on a first type f channel that overlaps with the second type working channel, and there is a cluster on another first type channel, then the network control node joins clusters on the first type of channels that have clusters, and establish clusters on the first type of channels that do not have clusters.
6、 根据权利要求 1所述的方法， 其中， 6. The method according to claim 1, wherein,
如果工作信道为第二类工作信道，并且与该第二类工作信道重叠的两个第一类信 道上都有簇，则所述网络控制节点分别加入与该第二类工作信道重叠的两个第一类信 道上的簇。 If the working channel is a second type working channel, and there are clusters on the two first type channels that overlap with the second type working channel, then the network control node respectively joins the two first type channels that overlap with the second type working channel. Clusters on type 1 channels.
7、 根据权利要求 1所述的方法， 其中， 7. The method according to claim 1, wherein,
如果工作信道为第二类工作信道，则所述网络控制节点在与所述第二类工作信道 重叠的两个第一类信道上分别发送信标帧。 If the working channel is a second type working channel, the network control node sends beacon frames respectively on the two first type channels that overlap with the second type working channel.
8、 根据权利要求 7所述的方法， 其中， 如果与所述第二类工作信道重叠的两个 第一类工作信道上所述网络控制节点的信标调度时间相同，则所述网络控制节点发送 所述信标帧的步骤包括： 8. The method according to claim 7, wherein if the beacon scheduling time of the network control node on the two first-type working channels that overlap with the second-type working channel is the same, then the network control node The steps of sending the beacon frame include:
如果所述网络控制节点不支持正交频分复用 （OFDM)技术， 则所述网络控制节 点以时分的方式在与所述第二类工作信道重叠的两个第一类信道上发送所述信标帧； 如果所述网络控制节点支持正交频分复用 （OFDM)技术， 则所述网络控制节点 同时在与所述第二类工作信道重叠的两个第一类信道上发送所述信标帧。 If the network control node does not support Orthogonal Frequency Division Multiplexing (OFDM) technology, the network control node sends the first-type channel overlapping with the second-type working channel in a time-division manner. Beacon frame; If the network control node supports Orthogonal Frequency Division Multiplexing (OFDM) technology, the network control node simultaneously sends the two first-type channels that overlap with the second-type working channel. beacon frame.
9、 一种分布式的成簇装置， 所述装置应用于网络控制节点， 其中， 所述装置包 括： 9. A distributed clustering device, the device is applied to a network control node, wherein the device includes:
第一确定单元，其根据所述网络控制节点的工作带宽确定所述网络控制节点的工 作信道， a first determination unit that determines the working channel of the network control node according to the working bandwidth of the network control node,
成簇单元，其根据第一确定单元确定的所述网络控制节点的工作信道，加入所述 工作信道上的或者与所述工作信道重叠的信道带宽比所述工作信道的信道带宽小的 信道上的簇，或者在所述工作信道上或者与所述工作信道重叠的信道带宽比所述工作 信道的信道带宽小的信道上建立簇。 A clustering unit that, according to the working channel of the network control node determined by the first determining unit, joins the channel on the working channel or on the channel that overlaps with the working channel and has a smaller bandwidth than the channel bandwidth of the working channel. cluster, or establish a cluster on the working channel or on a channel with a channel bandwidth that overlaps with the working channel and is smaller than the channel bandwidth of the working channel.
10、 根据权利要求 9所述的装置， 其中， 所述成簇单元包括： 10. The device according to claim 9, wherein the clustering unit includes:
第一处理单元， 其在所述网络控制节点的工作信道为第一类工作信道， 并且在该 第一类工作信道上已经有簇时， 加入所述簇。 The first processing unit joins the cluster when the working channel of the network control node is a first-type working channel and there is already a cluster on the first-type working channel.
11、 根据权利要求 9所述的装置， 其中， 所述成簇单元包括： 11. The device according to claim 9, wherein the clustering unit includes:
第二处理单元， 其在所述网络控制节点的工作信道为第一类工作信道， 并且在该 第一类工作信道上还没有簇时， 在该第一类工作信道上建立簇。 The second processing unit is configured to establish a cluster on the first-type working channel when the working channel of the network control node is a first-type working channel and there is no cluster on the first-type working channel.
12、 根据权利要求 9所述的装置， 其中， 所述成簇单元包括： 12. The device according to claim 9, wherein the clustering unit includes:
第三处理单元， 其在所述网络控制节点的工作信道为第二类工作信道， 并且与该 第二类工作信道重叠的两个第一类信道上都没有簇时，分别在与该第二类工作信道重 叠的两个第一类信道上建立簇。 The third processing unit is configured to, when the working channel of the network control node is a second type working channel, and there are no clusters on the two first type channels that overlap with the second type working channel, respectively A cluster is established on two first-class channels whose class working channels overlap.
13、 根据权利要求 9所述的装置， 其中， 所述成簇单元包括： 13. The device according to claim 9, wherein the clustering unit includes:
第四处理单元， 其在所述网络控制节点的工作信道为第二类工作信道， 并且与该 第二类工作信道重叠的一个第一类信道上没有簇， 另一个第一类信道上有簇时， 加入 有簇的所述第一类信道上的簇， 并在没有簇的所述第一类信道上建立簇。 The fourth processing unit is configured when the working channel of the network control node is a second type working channel, and there is no cluster on a first type channel that overlaps with the second type working channel, and there is a cluster on the other first type channel. At this time, clusters on the first type channel that have clusters are added, and clusters are established on the first type channels that do not have clusters.
14、 根据权利要求 9所述的装置， 其中， 所述成簇单元包括： 第五处理单元， 其在所述网络控制节点的工作信道为第二类工作信道， 并且与该 第二类工作信道重叠的两个第一类信道上都有簇时，分别加入与该第二类工作信道重 叠的两个第一类信道上的簇。 14. The device according to claim 9, wherein the clustering unit includes: a fifth processing unit, the working channel of the network control node is a second type working channel, and the working channel of the second type is When there are clusters on the two overlapping first-type channels, clusters on the two first-type channels that overlap with the second-type working channel are added respectively.
15、 根据权利要求 9所述的装置， 其中， 所述成簇单元包括： 15. The device according to claim 9, wherein the clustering unit includes:
发送单元，其在所述网络控制节点的工作信道为第二类工作信道时，在与所述第 二类工作信道重叠的两个第一类信道上分别发送信标帧。 A sending unit that, when the working channel of the network control node is a second type working channel, sends beacon frames respectively on two first type channels that overlap with the second type working channel.
16、 根据权利要求 15所述的装置， 其中， 16. The device according to claim 15, wherein,
如果与所述第二类工作信道重叠的两个第一类工作信道上所述网络控制节点的 信标调度时间相同， 并且所述网络控制节点不支持正交频分复用 （OFDM)技术， 则 所述发送单元以时分的方式在与所述第二类工作信道重叠的两个第一类信道上发送 所述信标帧； If the beacon scheduling time of the network control node on the two first-type working channels that overlap with the second-type working channel is the same, and the network control node does not support orthogonal frequency division multiplexing (OFDM) technology, Then the sending unit sends the beacon frame on two first-type channels that overlap with the second-type working channel in a time-division manner;
如果与所述第二类工作信道重叠的两个第一类工作信道上所述网络控制节点的 信标调度时间相同， 并且所述网络控制节点支持正交频分复用 （OFDM)技术， 则所 述发送单元同时在与所述第二类工作信道重叠的两个第一类信道上发送所述信标帧。 If the beacon scheduling time of the network control node on the two first-type working channels that overlap with the second-type working channel is the same, and the network control node supports orthogonal frequency division multiplexing (OFDM) technology, then The sending unit simultaneously sends the beacon frame on two first-type channels that overlap with the second-type working channel.
17、 一种网络系统， 其中， 所述网络系统包括网络控制节点， 所述网络控制节点 被配置为： 17. A network system, wherein the network system includes a network control node, and the network control node is configured as:
根据所述网络控制节点的工作带宽确定所述网络控制节点的工作信道； 根据确定的所述网络控制节点的工作信道，加入所述工作信道上的或者与所述工 作信道重叠的信道带宽比所述工作信道的信道带宽小的信道上的簇，或者在所述工作 信道上或者与所述工作信道重叠的信道带宽比所述工作信道的信道带宽小的信道上 建立簇。 Determine the working channel of the network control node according to the working bandwidth of the network control node; According to the determined working channel of the network control node, add the channel bandwidth ratio on the working channel or overlapping with the working channel. A cluster is established on a channel with a smaller channel bandwidth of the working channel, or a cluster is established on the working channel or a channel with a channel bandwidth that overlaps with the working channel is smaller than the channel bandwidth of the working channel.
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Citations (2)

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Publication number Priority date Publication date Assignee Title
CN103118406A (en) * 2013-03-11 2013-05-22 华为技术有限公司 Non-central cluster mechanism achieving method and device
CN103548371A (en) * 2011-03-08 2014-01-29 新加坡科技研究局 Dynamic bandwidth control of channels for co-existence of network

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103548371A (en) * 2011-03-08 2014-01-29 新加坡科技研究局 Dynamic bandwidth control of channels for co-existence of network
CN103118406A (en) * 2013-03-11 2013-05-22 华为技术有限公司 Non-central cluster mechanism achieving method and device

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