WO2017166032A1 - 一种nan设备发送同步信标消息的方法和设备 - Google Patents
一种nan设备发送同步信标消息的方法和设备 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
- H04W56/0015—Synchronization between nodes one node acting as a reference for the others
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
- H04W84/20—Master-slave selection or change arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
Definitions
- the present invention relates to the field of communications, and in particular, to a method and device for transmitting a synchronization beacon message by a NAN device.
- Wi-Fi wireless-Fidelity
- IEEE Institute of Electrical and Electronics Engineers
- AP Access Point
- STA station
- NAN Neighbor Awareness Network
- the role of the NAN mechanism is to synchronize all the devices participating in the NAN mechanism without the central node, and maintain the NAN mechanism and service discovery in the discovery window (DW) agreed by the NAN mechanism. After the service is discovered, the service is discovered. Based on the information obtained in the service discovery, a corresponding connection is established between the devices to form a cluster, and then data transmission is performed.
- the device in the NAN mechanism includes two roles: a master and a non-master.
- the master includes an anchor master (AM) and a non-anchor master.
- the default is synchronous (sync) state.
- Non-master includes non-master sync and non-master non-sync. Each device can be master, non-master sync, non-master non-sync.
- the state changes constantly and is in one of the states.
- a sync beacon message is sent by the device in the master role and the non-master sync state.
- the message carries the information of the AM, including an anchor master rank (AMR), an anchor master beacon transmission time (AMBTT), a time synchronization function (TSF), and a cluster.
- AMR anchor master rank
- AMBTT anchor master beacon transmission time
- TSF time synchronization function
- the NAN device A in the cluster 1 receives the sync beacon message sent by the device B in the other cluster 2, if the NAN device A obtains the cluster level (Cluster grade, CG) value of the Cluster 2 according to the beacon message, it is smaller than the cluster1.
- the CG value is large, and the NAN device A leaves the cluster1 and merges to the cluster2 in the master role.
- the synchronous beacon message is sent in the DW of the cluster1, and the information of the cluster2 is carried.
- the device is flooded, so that the device that hears the sync beacon in Cluster1 is also added to Cluster2 in the master role.
- the master that joins the cluster 2 sends a sync beacon message, which is easy to cause conflicts, and the other NAN devices in the cluster 2 may not receive the sync beacon. Empty resources are wasted.
- the embodiment of the invention provides a method and a device for sending a synchronization beacon message by a NAN device, which can solve the problem that a sync beacon message conflicts when a NAN device joins a new cluster in the master role.
- the first aspect provides a method for a NAN device to send a synchronization beacon message, including:
- the first device in the first cluster in the NAN receives the message, and the message includes the first cluster information of the second cluster;
- the synchronization beacon message is sent in the second cluster according to the role and state of the first device in the first cluster.
- the first device herein may receive a message sent by the second device in the second cluster, the message includes the first cluster information of the second cluster, or receive the cancellation sent by the third device in the first cluster.
- the third device is in the first NAN data cluster NDC of the first cluster, the message includes the first cluster information of the second cluster, or receives the message sent by the fourth device in the first cluster, where the message includes the second cluster a cluster of information;
- the first cluster information may include at least one of a cluster identifier of the second cluster, a first anchor master ordering AMR, a first anchor master beacon transmission time AMBTT, a first time synchronization function TSF, and a first hop count HC.
- the first device when the first device joins the second cluster, the first device does not join the second cluster in the master role and sends the synchronization beacon message in the second cluster, as in the prior art.
- the role and state of a device in the first cluster determines that a synchronization beacon message is sent. Since different retreat intervals in different roles and states are different or a synchronization beacon message is not sent in a role and state, multiple devices can be prevented from joining the second device. A sync beacon conflict that occurs in a cluster.
- transmitting the synchronization beacon message in the second cluster according to the role and state of the first device in the first cluster includes:
- the role and state of the first device in the first cluster are the primary device or the non-primary device, and the state is the synchronization state, and the first device sends the synchronization beacon message in the second cluster.
- the method before the first device sends the synchronization beacon message, the method further includes:
- the first device sets information of the first device according to the first cluster information.
- the information of the first device itself can be set according to the received first cluster information of the second cluster, so that the first device can be timely and timely when joining the second cluster.
- the devices in the two clusters are interconnected.
- the setting, by the first device, the information of the first device according to the first cluster information includes: setting, by the first device, the cluster identifier of the first device, the anchor master information, the second TSF, and the role and state of the first device.
- the cluster identifier of the first device is a cluster identifier of the second cluster
- the anchor master information includes at least one of the second AMR, the second AMBTT, and the second HC
- the value of the second AMR is The value of an AMR is the same
- the second The value of the AMBTT is the same as the value of the first AMBTT
- the value of the second HC is the value of the first HC plus one
- the second TSF is the same as the first TSF
- the role of the first device is the master device, and the state defaults to the synchronization state
- the role and state of the first device are the same as the role and state of the first device in the first cluster; or the role and state after the first device is set according to at least one of the information before the setting of the first device
- the pre-set information includes the sponsor device ranking MR before the first device setting, the HC before setting, and the AMBTT before setting, as determined by comparison with at least one of the first cluster information.
- the HC indicating the hop count is incremented by one, and the role and state of the first device are not directly in the master role as in the first setting in the prior art.
- the second cluster is added, but may be set to master, or may be set to be the same as the role and state of the first device in the first cluster, and the rest of the information is corresponding to the received first cluster information of the second cluster. The information is consistent, so that the first device can be interconnected with the devices in the second cluster in time.
- the method before the first device sets the information of the first device, the method further includes: if the first device receives the message from the second device, The first device acquires the MR of the second device; if the first device receives the message from the third device, the first device acquires the MR of the third device; And the first device acquires the MR of the fourth device by the device receiving the message from the fourth device.
- the determining, according to the role and state of the first device in the first cluster, whether to send a synchronization beacon message in the second cluster comprises: setting a role of the first device And the state is the same as the role and state of the first device in the first cluster, if the role is the master device or the non-master device, and the state is the synchronization state, the first device determines Sending the synchronization beacon message in the second cluster; if the set role is a non-master device, and the state is an unsynchronized state, the first device determines not to send in the second cluster The synchronization beacon message.
- the synchronization beacon message carries at least one of the information set by the first device. Therefore, when the first device joins the second cluster, if the set role is a non-master device and the state In the unsynchronized state, it is not necessary to send a synchronization beacon message to avoid synchronization beacon message conflict, and also save air interface resources.
- the method further includes: when the role of the first device is set as the main device, the first device records the role and state of the first device in the first cluster; Determining whether the role and the state in the first cluster send the synchronization beacon message in the second cluster includes: if the role of the first device in the first cluster is a master device or a non-master device, the state is a synchronization state. The first device determines to send the synchronization beacon message; if the role of the first device in the first cluster is a non-primary device, and the state is an unsynchronized state, the first device determines not to send the synchronization beacon in the second cluster. Message.
- the first device joins the second cluster in the role of the master when joining the second cluster, it is determined whether the synchronization beacon message is sent in the second cluster, so that the first device is in the first before joining the second cluster.
- the roles and states in the cluster are judged because the role and state of the first device in the first cluster are not necessarily master, and the backspace of the master role is [0, 15], and the device of the non-master role sync state
- the backoff interval is [0, 31], and the non-master state non-sync state does not send the synchronization beacon message, which can prevent the device added to the second cluster from sending a synchronization beacon message to generate a collision.
- the synchronization beacon message may be sent in the second cluster after the retreat interval is modified, which may include: when the role of the first device is set as the main device, the first device modifies the retreat interval, and after the modification The backoff interval is greater than the backoff interval before the modification; the first device sends the synchronization beacon message in the second cluster according to the modified backoff interval.
- the first device sends a synchronization beacon message in the second cluster.
- the first device can modify the backoff interval before sending, so that the modified device can be modified.
- the backoff interval is greater than the backoff interval before the modification, so that the probability that the number of backoffs randomly selected by the device joining the second cluster may be the same may be reduced, thereby avoiding the collision of sending the synchronization beacon frame.
- the role and state of the first device are determined according to at least one of the information before the setting of the first device and at least one of the second cluster information, if the setting is The role is primary or non-primary, and the status is synchronous.
- the first device determines to send the synchronization beacon message in the second cluster; if the set role is the non-master device and the state is the unsynchronized state, the first device determines not to send the synchronization beacon message in the second cluster.
- the role of the first device is master, and the MR is smaller than the MR in the second cluster information. Then, the role set by the first device is non-master, and the state is sync. After the first device joins the second cluster, the synchronization is determined.
- the beacon frame for example, the role before the first device setting is non-master, the state is sync state, and the value of HC is smaller than the value of HC in the second cluster, then the role set by the first device is non-master, state In the non-sync state, the first device joins the second cluster and does not send the synchronization beacon frame, which can avoid the sync conflict problem and save the air interface resources.
- the method further includes: if the first device receives the first cluster information sent by the second device, and the first device is in the at least one NDC, the first device determines to send the first in at least one NDC.
- the second cluster information of the two clusters, the second cluster information including at least one of the information set by the first device.
- the first device receives the first cluster information from the second device of the second cluster, if the first device is in the at least one NDC in the first cluster, the second cluster is also sent in the at least one NDC.
- the information is such that the device that hears the information of the second cluster in the at least one NDC is also connected to the second cluster, so that the first device diffuses the cluster information of the second cluster in the NDC in the first cluster.
- the propagation range of the cluster information of the second cluster is expanded, and the cluster information can be transmitted faster by the NDC.
- the method further includes: if the first device has received the second cluster information sent by any other device in the first cluster, the first device cancels sending the second cluster information in the at least one NDC. .
- the second cluster information can be prevented from being repeatedly transmitted in the at least one NDC to save air interface overhead.
- the method further includes: if the first device receives the message from the third device, the first device determines to send the first NDC in the remaining NDCs except the first NDC in all the NDCs in which the first device is located.
- the second cluster information of the second cluster, the second cluster information packet At least one of the information after the first device is set.
- the third device is the device in any one of the first clusters.
- the first device may send the information of the second cluster in the remaining NDCs where the first device is located.
- the propagation range of the cluster information of the second cluster is expanded, and the cluster information can be transmitted faster by the NDC.
- the method further includes: if the first device has received the second cluster information from any of the remaining NDCs, the first device cancels sending the second cluster information in the remaining NDCs.
- the information of the second cluster can be avoided from being repeatedly transmitted in the first cluster, which saves the air interface overhead.
- the method further includes: the first device updating at least one of an NDC management window, an NDC data link NDL information, a group key, and a device identifier of the first device.
- the first device after the first device joins the second cluster, the first device can be interconnected with the devices in the second cluster according to the updated information.
- a first device is provided, where the first device is in the proximity sensing network NAN, and includes:
- a receiving unit configured to receive a message, where the message includes the first cluster information of the second cluster
- the first determining unit when the first device joins the second cluster, sends a synchronization beacon message in the second cluster according to the role and state of the first device in the first cluster.
- the first determining unit is configured to: if the role and state of the first device in the first cluster are a master device or a non-master device, and the state is a synchronization state, the first device is in the second cluster. Send a synchronization beacon message.
- it also includes:
- a setting unit configured to set information of the first device according to the first cluster information before the first device sends the synchronization beacon message.
- the first cluster information includes a cluster identifier of the second cluster, a first anchor master ordering AMR, a first anchor master beacon transmission time AMBTT, a first time synchronization function TSF, and At least one of the first hop counts HC.
- the setup unit is used to:
- the cluster identifier of the first device is a cluster identifier of the second cluster
- the anchor master information includes at least one of a second AMR, a second AMBTT, and a second HC, the value of the second AMR is the same as the value of the first AMR, and the value of the second AMBTT is the same as the value of the first AMBTT, the second HC The value of the first HC is increased by one;
- the second TSF is the same as the first TSF
- the role of the first device is the master device, and the state is the synchronization state by default; or the role and state of the first device are the same as the role and state of the first device in the first cluster; or the role and state after the first device is set is According to at least one of the information before the first device setting is compared with at least one of the first cluster information, the information before the setting includes the primary device ranking MR before the first device setting, the HC before setting, and the setting before AMBTT.
- the receiving unit is configured to: send a message sent by the second device in the second cluster, the message includes the first cluster information of the second cluster; or receive the message sent by the third device in the first cluster, The third device is in the first NAN data cluster NDC of the first cluster, the message includes the first cluster information of the second cluster; or receives the message sent by the fourth device in the first cluster, the message includes the first cluster of the second cluster information.
- the acquiring unit before the first device sets the information of the first device, the acquiring unit further includes: an acquiring unit, configured to:
- the first determining unit is used to:
- the role and state of the first device are set to be the same as the role and state of the first device in the first cluster, if the set role is the master device or the non-master device, and the state is the synchronization state, it is determined in the second cluster. Sending a synchronization beacon message;
- the set role is a non-master device and the state is an unsynchronized state, it is determined that the synchronization beacon message is not sent in the second cluster.
- it also includes:
- a recording unit configured to record a role and a state of the first device in the first cluster when the role of the first device is set as the master device;
- the first determining unit is used to:
- the role of the first device in the first cluster is a master device or a non-master device, and the state is a synchronization state, determining to send a synchronization beacon message;
- the role of the first device in the first cluster is a non-master device and the state is an unsynchronized state, it is determined that the synchronization beacon message is not sent in the second cluster.
- the first determining unit is configured to: when the role of the first device is set as the master device, determine to send a synchronization beacon message in the second cluster;
- the setting unit is further configured to: modify the back-off interval, and the modified back-off interval is greater than the back-off interval before the modification.
- the first determining unit is used to:
- the role and status of the first device are determined according to at least one of the information before the setting of the first device and at least one of the second cluster information, if the set role is the When the master device or the non-master device is in the synchronization state, determining to send the synchronization beacon message in the second cluster;
- the set role is a non-master device and the state is an unsynchronized state, it is determined that the synchronization beacon message is not sent in the second cluster.
- a second determining unit is further included for:
- the first device determines to send the second cluster information of the second cluster, the second cluster information, in the at least one NDC.
- the at least one of the information after the setting of the first device is included.
- it also includes:
- the first canceling unit is configured to cancel sending the second cluster information in the at least one NDC if the first device has received the second cluster information sent by any other device in the first cluster.
- the first cancellation unit is used to:
- the second cluster information is cancelled in at least one NDC.
- a third determining unit is further included for:
- the first device receives the message from the third device, determining to send the second cluster information of the second cluster in the remaining NDCs except the first NDC in all the NDCs in which the first device is located, where the second cluster information includes the first At least one of the information after the device is set.
- it also includes:
- a second canceling unit configured to cancel sending the second cluster information in the remaining NDCs if the first device has received the second cluster information from any of the remaining NDCs.
- a fourth determining unit is also included for:
- the first device receives the message from the fourth device, determining to send the second cluster information of the second cluster in the first cluster, where the second cluster information includes at least one of the information set by the first device.
- a third cancellation unit is further included for:
- the setup unit is also used to:
- a first device having a function to implement the behavior of a first device in the design of the method described above.
- the functions can be implemented in hardware or in hardware by executing the corresponding software.
- the hardware or software includes one or more modules corresponding to the functions described above.
- the first device includes a processor and a network interface, the processor being configured to support the first device to perform a corresponding function in the above method, and the network interface is configured to support the first device to send and receive messages.
- the network interface is configured to receive a message, and the message includes the first cluster information of the second cluster; the processor is configured to determine, when joining the second cluster, the information of the first device according to the first cluster information.
- the first device can also include a memory for coupling with the processor that retains the program instructions and data necessary for the first device.
- the method provided by the present invention can determine whether the second device is in the second cluster according to the role and state of the first device in the first cluster when the first device receives the first cluster information of the second cluster.
- Sending a synchronization beacon message which avoids the problem that the devices joining the second cluster join and send the sync beacon conflict generated by the sync beacon message, for example, the role of the first device in the first cluster is non-master, the state When non-sync, you do not need to send a sync beacon message, which not only avoids sync beacon conflicts, but also saves air interface resources.
- FIG. 1 is a schematic diagram of a NAN network architecture including two clusters according to an embodiment of the present invention
- FIG. 2 is a schematic diagram of connection of an NDC in the same cluster according to an embodiment of the present invention.
- FIG. 3 is a schematic flowchart of a method for sending a synchronization beacon message according to an embodiment of the present disclosure
- FIG. 4 is a schematic flowchart of a method for sending a synchronization beacon message according to an embodiment of the present invention
- FIG. 5 is a schematic flowchart of a method for setting beacon transmission and anchor master information after setting information of a NAN device according to an embodiment of the present disclosure
- FIG. 6 is a schematic flowchart of a method for setting beacon transmission and anchor master information after setting information of a NAN device according to an embodiment of the present disclosure
- FIG. 7 is a schematic flowchart of a method for setting beacon transmission and anchor master information after setting information of a NAN device according to an embodiment of the present disclosure
- FIG. 8 is a schematic flowchart of a cluster information diffusion method after setting information of a NAN device according to an embodiment of the present disclosure
- FIG. 9 is a schematic flowchart of a cluster information diffusion method after setting information of a NAN device according to an embodiment of the present disclosure.
- FIG. 10 is a schematic flowchart of a cluster information diffusion method after setting information of a NAN device according to an embodiment of the present disclosure
- FIG. 11 is a schematic structural diagram of a first device according to an embodiment of the present disclosure.
- FIG. 12 is a schematic structural diagram of a first device according to an embodiment of the present disclosure.
- FIG. 13 is a schematic structural diagram of a first device according to an embodiment of the present disclosure.
- FIG. 14 is a schematic structural diagram of a first device according to an embodiment of the present invention.
- the embodiment of the present invention is applied to the NAN.
- the NAN may include multiple clusters. There may be overlapping areas between the coverages of the clusters.
- FIG. 1 is a schematic diagram of a NAN network architecture including two clusters, as shown in FIG. NAN Cluster2, each cluster includes multiple NAN devices and/or NAN2.0 devices, and synchronization, maintenance work, and service discovery work can be performed between NAN devices.
- a cluster may include multiple NAN Data Clusters (NDCs) (also referred to as data groups or other names). Each NDC can be understood as a group consisting of NAN2.0 devices, and is at least two NAN2s.
- NDCs NAN Data Clusters
- NDL NAN Data Link
- the NAN2.0 device can establish multiple NDLs, as shown in Figure 2.
- Figure 2 is a schematic diagram of the connection of an NDC in the same Cluster.
- the NAN device or the NAN2.0 device may be a communication terminal such as a mobile phone or a tablet. For example, data transmission may be performed between multiple mobile phones to simultaneously perform network games.
- the synchronization between the NAN devices can be time synchronization; the service discovery work can enable the NAN device to establish a corresponding connection based on the information obtained in the service discovery, thereby performing data transmission; the NAN device can be divided into a master and a non-master, and the state of the master can be
- the anchor master (AM) and the non-anchor master (also referred to as the master) are both defaulted to the sync state.
- the non-master state can be non-master sync and non-master non-sync. Maintaining the work can make each NAN device have a fair chance to change and be in one of the four states.
- a DW can be set every 512 TU, and the duration is 16 TU, and a TU (time unit) is approximately
- the NAN device in the anchor master, the master, and the non-master sync state uses the backoff mechanism to contend for the synchronous beacon message.
- the message carries the information of the AM. After the other device hears the message, it sets its own related information to synchronize with the AM. .
- the NDC includes a Base Schedule.
- the NAN device wakes up and can receive messages sent by other NAN devices or send messages to other NAN devices, which is equivalent to the NDC management window, so that the NDC is in the NDC. Data communication between NAN devices.
- the NAN device joins the cluster 2 when it joins the cluster 2.
- the NAN device also sends the information of the cluster 2 in the cluster 1 in the process of joining, so that the NAN that hears the information in the cluster 1
- the master role is added to the cluster2, so that the NAN device with multiple master roles sends a sync beacon message in the cluster2, and the backhaul interval used by the master role to send the sync beacon message is [0, 15], which is easy to generate sync beacon conflicts.
- the NAN device determines to join the Cluster2, and determines whether to send a sync beacon message in the Cluster2 according to the role and state of the NAN device in the Cluster1, so as to avoid the problem of the sync beacon conflict. Therefore, the embodiment of the present invention provides a method for a NAN device to send a synchronization beacon message. As shown in FIG. 3, the method includes:
- the first device in the first cluster in the NAN receives the message, where the message includes the first cluster information of the second cluster.
- the first cluster is the last cluster of the second cluster in which the first device is located, or merges to the cluster before the second cluster.
- the first device in the first cluster (denoted as Cluster1) in the NAN may receive a message sent by the second device in the second cluster (denoted as Cluster2), the message including the first cluster information of the second cluster, the message specific It can be a sync beacon frame in the DW, or a discovery beacon frame outside the DW;
- the first device receives the message sent by the third device in the first cluster, where the third device is in the first NDC of the first cluster, the message includes the first cluster information of the second cluster, and the message may be an announcement message. (announcement frame);
- the first device receives the message sent by the fourth device in the first cluster, where the message may be a sync beacon message in the DW, or may be a discovery beacon message other than the DW, including the first cluster information of the second cluster,
- the fourth device may be in the NDC of the first cluster or may not be in the NDC of the first cluster, and the message may be spread in the first cluster in a broadcast form.
- the first device is referred to as NAN device A
- the second device is recorded as NAN device B
- the first cluster information is information of Cluster 2, including at least one of the following: Cluster ID, cluster, AMR, TSF, AMBTT, HC, etc.
- the Cluster ID is the ID of the Cluster2
- the AMR is the value of the MR of the AM in the Cluster2
- the AMBTT is the value of the AMBTT of the AM in the Cluster2
- the HC is the HC value of the AM in the NAN Device B to the Cluster2
- the TSF is the NAN Device A
- the value of the TSF in the received message, the TSF value is obtained according to the time stamp in the message, and the TSF value can usually be replaced by the TSF.
- MP Master Preference
- CG cluster level information
- AMR is the MR value of AM
- MR value indicates the willingness of the NAN device to be the master, and the larger the MR value, the higher the willingness
- the TSF indicates the synchronization function of the NAN device, which can make the timer of the NAN device
- the AM time is the same
- AMBTT indicates the transmission time of the AM beacon
- the HC value indicates the hop count of the NAN device to the AM.
- the NAN device A in the cluster 1 receives the information of the cluster 2, the NAN device A determines whether the CG value in the information of the cluster 2 is greater than the location of the NAN device A according to whether the cluster ID in the cluster 2 information is the same as the cluster ID of the cluster 1 .
- the CG value of Cluster1 if the Cluster ID is different, and the CG value in the information of Cluster2 is greater than the CG value of Cluster1, the NAN device determines to join Cluster2; otherwise, NAN Device A discards the received message.
- the synchronization beacon message is sent in the second cluster according to the role and state of the first device in the first cluster.
- the NAN device A when the NAN device A determines to join the Cluster 2, it can determine whether to send a sync beacon message in the Cluster 2 according to the role and state of the NAN device A in the Cluster 1, for example, the role of the NAN device A in the Cluster 1 is the master, or the role.
- the NAN device A determines to send a sync beacon message when it joins the cluster 2; when the NAN device A has a non-master role in the cluster 1, and the state is non-sync, the NNA device A It is determined that the sync beacon message is not sent when joining Cluster2.
- the backoff interval of the synchronous beacon message sent by the NAN device of the master role in the current specification is [0, 15], so the backoff interval can be modified, so that the modified The backoff interval is larger than the backoff interval [0, 15] before the modification.
- the modified backoff interval is [0, 50] and other intervals, so that the probability that the NAN device selects the same number of backoffs is reduced to avoid sync beacon conflict.
- the NAN specification in the prior art does not specify how the NAN device sets its own information when it joins the Cluster2 from the Cluster1, so that the NAN devices of the various vendors do not have a unified standard when implemented, and the information of different NAN devices may cause the NAN device to be different.
- the cluster When the cluster is added to the cluster 2, it cannot be synchronized with the AM in the cluster 2, and the interworking between the NAN devices cannot be implemented. Therefore, before the NAN device joins the cluster 2 and sends a sync beacon message, the NAN device can also receive the information of the cluster 2 according to the received information. Set up your own information so that it can be set up in time with Cluster2 The device is interconnected. Therefore, as shown in FIG. 4, before the first device sends the synchronization beacon message, the method further includes:
- the first device sets information about the first device according to the first cluster information.
- the setting of the information of the first device may be when the first device decides to join the second cluster, or when the first device is ready to join the second cluster, or after the first device has joined the second cluster, This application is not limited.
- the first anchor information of the first device When the first device, that is, the NAN device A sets its own information, the first anchor information of the first device, the TSF, the role and state of the first device, and the cluster identifier may be set according to the first cluster information of the Cluster2. At least one item may also include a last anchor master record.
- the anchor master information may also be information (including: at least one of the second AMR, the second AMBTT, and the second HC) sent in the sync beacon, or the information sent in the announcement frame (including: second At least one of AMR, second AMBTT, and second HC).
- the current anchor master record includes at least one of the first AMR, the first AMBTT, and the first HC, and the value of the first AMR is set to the value of the MR (second AMR) of the AM in the Cluster2 obtained in step 301. That is, the value of the first AMR is the same as the value of the second AMR; the value of the first AMBTT is set to the value of the AMBTT (second AMBTT) of the AM of Cluster2 in step 301, that is, the value of the first AMBTT and the value of the second AMBTT.
- the value of the first HC is set to the HC value obtained in step 301 plus 1; since the previous anchor master information is the information of the AM in Cluster1, when the NAN device A confirms that it is to be added to the Cluster2, the previous anchor master The information can be set to be empty or 0.
- the first TSF needs to be synchronized with the time information in the added Cluster2. Therefore, the first TSF is set to the second TSF carried in the message; the role of the NAN device A can be directly set as the master device.
- the status is the synchronization status, or the default is the synchronization status, or the role and status of the NAN device A in the cluster1 is the same; the cluster ID is set to the ID of the cluster 2 to be joined by the NAN device A.
- the TSF indicates time information for transmitting the message, if the first device receives at least two of the second device, the third device, and the fourth device.
- the HC and TSF of the first cluster information in the message may be different.
- the roles and states of the NAN device A are the same as those of the N1 device A.
- the role and status of the NAN device A at the end of the DW of the Cluster 1 are not limited in this application.
- the role of the NAN device A in the cluster 1 is non-master and the state is the sync state.
- the NAN device A joins the cluster 2 the role remains non-master and the state is still in the sync state.
- the NAN device A is in the cluster1.
- the role of the middle is master, and the state defaults to sync.
- the role joins Cluster2 the role remains master and the state is still sync.
- the first device may also acquire the MR of the third device or the fourth device.
- the first cluster information received by the first device further includes an MP value and a random number (RF) of the third device, where the first device can be at least Calculating, according to the MP value, the RF value, and the Media Access Control (MAC) address of the third device, the MR of the third device;
- the first device may calculate the MR of the fourth device according to the MP value and the RF value of the fourth device.
- the first case the role of the first device can be set as the master device, the state defaults to the synchronization state, and the second case: the role of the first device can also be set.
- the state is the same as the role and state of the first device in the first cluster.
- the role of the first device may be determined according to the comparison between the information before the first device setting and the first cluster information. And status.
- the first device may compare the MR, HC, and AMBTT of the first device with the MR, HC, and AMBTT of the corresponding third device or the fourth device in the received message, For example, the third device or the first obtained
- the MR of the four devices is higher than the value of the MR of the first device, or the HC value in the message is higher than the HC value of the first device, or the AMBTT value in the message is greater than the AMBTT value of the first device, and any one of them is satisfied at this time.
- the first device is updated from the master role sync state to the non-master role sync state, or if the current state of the first device is the non-master role sync state. Then the first device is updated from the non-master role sync state to the non-master role non-sync state. Or, before the first device joins the second cluster, if the MR value in the received message(s) is not higher than its own MR value, or the HC value in the received message(s) does not have its own HC The value is high and the first device can be updated from the other roles to the master role.
- the first device may further determine whether the message meets one of a short-range condition or a long-distance condition, where the close-range condition is a Receive Signal Strength Indicator (RSSI) in the message. Greater than -60 dBm, the long range condition is RSSI greater than -75 and less than -60 dBm. If the message satisfies the close distance condition, the first device can perform the setting process in the third case described above after receiving the message. Or, if the message satisfies the long-distance condition, the first device may perform the setting process in the third case described above after receiving the message, and may also be used in the first case or the second case.
- RSSI Receive Signal Strength Indicator
- the NAN device confirms the join to Cluster2, it does not directly join the master role, and sets the MR to the MR of the NAN device itself.
- the HC is not 0 as the master role, and the AMBTT is not the same as the master role. 0, but the role and status can be set to master, the status defaults to sync, or the same role and status as the NAN device in Cluste1r, but the device information is set according to the received information of Cluster2.
- the NAN device can determine the role and state of the first device according to at least one of the information before the setting of the first device and the at least one of the first cluster information, so when the NAN device joins the Cluster 2, the NAN device can The AMs in Cluster2 are synchronized in time, so that the NAN devices newly added to Cluster2 can communicate with the NAN devices in Cluster2 in time.
- FIG. 5 is a schematic flowchart of a method for transmitting a beacon after setting information of the NAN device. As shown in FIG. 5, the method may further include:
- the first device determines to send a synchronization beacon message in the second cluster, and the synchronization beacon message carries the first device setting. At least one of the following information; if the set role is a non-master device and the state is an unsynchronized state, the first device determines not to send the synchronization beacon message in the second cluster.
- the set role and state are the same as the role and state of the NAN device A in the Cluster 1:
- the role of the NAN device A is master or non-master, and the state is sync, it is determined that the sync beacon message is sent in the cluster 2; if the role set by the NAN device A is a non master role and the state is non sync state, then Make sure that the sync beacon message is not sent in Cluster2.
- the sync beacon message includes one or more of the set current anchor master records set by the NAN device A in step 302, that is, the set AMR, One or more of HC, AMBTT, TSF, cluster ID, and MR of NAN device A itself.
- the Nacon device in the cluster 1 can effectively reduce the beacon message sent by the NAN device A.
- the NAN device A When joining the Cluster2 with the master role, multiple NAN devices Compete with conflicts that arise when sending sync beacon messages.
- any one of the backoff intervals [0, 15] may be randomly selected to contend for sending a sync beacon message, and carries the information in the currently set current anchor master record;
- any one of the backoff intervals [0, 31] can be randomly selected to contend for the synchronous beacon message, and the information in the currently set current anchor master record is carried. Therefore, under the setting of different roles and states, the number of backoffs randomly selected according to different retreat intervals can further effectively reduce the conflict problem when a plurality of NAN devices are in a sync state and compete to send a sync beacon message.
- the method further includes the following steps:
- the first device When receiving the synchronization beacon message sent by the other device in the second cluster, the first device sets the anchor information of the first device according to the synchronization beacon message.
- the NAN device A compares the information in the received sync beacon message with the information set by the NAN device A to determine whether to modify the information. Its own anchor master information to keep pace with other NAN devices in Cluster2.
- NAN device A updates the AMR value in its current anchor master record to sync.
- the AMR in the beacon message is the same as the value of the TSF in the sync beacon message;
- the AMBTT of the update beacon is the AMBTT in the sync beacon message;
- the HC value is updated to the HC value in the sync beacon message plus one.
- the NAN device A sets its own last anchor master record: sets the AMR to the AMR in the current anchor master record before the update; sets the AMBTT to the AMBTT in the current anchor master record before the update;
- the NAN device A does not process, or the NAN device A compares the value of the AMBTT in the sync beacon message with its own AMBTT after the NAN device A is set.
- the value of the AMBTT of the NAN device A itself is updated to the value of the AMBTT in the sync beacon message if the value of the AMBTT of the NAN device A itself is smaller than the value of the AMBTT in the sync beacon message, which is due to the sync beacon message.
- NAN device A When the value of AMBTT is greater than the value of AMBTT of NAN device A itself, it indicates that the time information is the latest, and NAN device A is to be synchronized with the latest time; if the value of AMBTT of NAN device A itself is greater than the value of AMBTT in the sync beacon message , then NAN device A does not process.
- the MR value carried in the sync beacon message is greater than the MR value of the NAN device A itself, when the NAN device A is currently in the master role, the role of the NAN device A needs to be updated to the non-master role, and the state is still in the sync state. If the status of the device is in the non-master state, the device needs to be updated to the non-master role and the state is non-sync.
- the HC value carried in the sync beacon message is smaller than the current HC value of the NAN device A, when the NAN device A is currently in the master role, the role of the NAN device A needs to be updated to the non-master role, and the state is still in the sync state. A is currently a non-master role. When the state is sync, you need to update its role to a non-master role with a non-sync state; or
- the NAN device A needs to be updated to the non-master role when the NAN device A is in the master role.
- the state is still in the sync state. A is currently a non-master role.
- FIG. 6 is a beacon transmission and anchor information after the NAN device setting information according to the embodiment of the present invention.
- a schematic diagram of the method flow is set, and the above steps 304-305 can be replaced with steps 306-308:
- the first device When the role of the first device is set as the master device, and the state is the synchronization state, the first device records the role and state of the first device in the first cluster.
- the NAN device A joins the Cluster2 from Cluster1, although it is determined that the set role is master, it is also necessary to record the role and state of the device itself in Cluster1.
- step 304 if the role of the first device in the first cluster is the master device or the non-master device, the state is the synchronization state, then it is determined to send the synchronization beacon message; if the first device is in the first cluster If the role is a non-master device and the state is an unsynchronized state, the first device determines not to send the synchronization beacon message in the second cluster.
- step 304 since step 304 is when the first device joins the second cluster, the role and state when the first device is in the first cluster are set, and steps 306-307 are When the first device is added to the second cluster, the role is the master device, and the state is the synchronization state by default. Therefore, if the step 307 determines to send the synchronization beacon message, the synchronization beacon message carries the first device setting. At least one of the information.
- the role of the NAN device A after leaving Cluster1 to be added to Cluster2 is set to master and the state is sync, it is determined whether to send the sync beacon message or the role and state of Cluster1 recorded by NAN device A.
- the information carried in the sync beacon message is the set information. It can effectively reduce the number of multiple clusters in Cluster1 when multiple NAN devices in Cluster1 are added to Cluster2 by the master role because they receive the beacon message sent by NAN device A.
- the NAN device competes for conflicts when sending sync beacon messages.
- any one of the backoff intervals [0, 15] can be randomly selected to contend for the synchronous beacon message and carry the current set current.
- the information in the anchor master record when the NAN device A is in the non master sync state, it can randomly select any one of the backoff intervals [0, 31] to contend for the synchronous beacon message, and carry the current set master anchor master record. Information in. Therefore, under the setting of different roles and states, the number of backoffs randomly selected according to different backoff windows can further effectively reduce the conflict problem when multiple NAN devices in the sync state in the cluster 2 compete for the sync beacon message.
- the first device after being added to the second cluster, receives the sync beacon message sent by the other NAN devices in the second cluster. Therefore, the foregoing method further includes:
- the first device When receiving the synchronization beacon message sent by the other device in the second cluster, the first device sets the anchor information of the first device according to the synchronization beacon message in the role of the primary device.
- the NAN device A compares the information in the received sync beacon message with the information set by the NAN device A to determine whether it is still As the master device, and modify its own anchor master information to keep in sync with other NAN devices in Cluster2.
- the NAN device A will no longer function as the master role, and needs to update its role as a non master and update its current anchor master record.
- One or more pieces of information update the AMR to the AMR in the sync beacon message; update the value of the TSF to the value of the TSF in the sync beacon message; update the AMBTT value to the AMBTT in the sync beacon message; update the HC value to the sync beacon
- the HC value in the message is incremented by 1.
- the NAN device A sets its own last anchor master record: sets the AMR to the AMR in the current anchor master record before the update; sets the AMBTT to the current anchor master record before the update.
- AMBTT AMBTT
- the NAN device A If the AMR in the sync beacon message is smaller than the AMR after the NAN device A is set, the NAN device A does not process; if the AMR in the sync beacon message is equal to the AMR after the NAN device A is set, the NAN device does not process, or The NAN device A compares the value of the AMBTT in the sync beacon message with the value of the AMBTT set by the NAN device A.
- the NAN device A If the value of the AMBTT of the NAN device A itself is smaller than the value of the AMBTT in the sync beacon message, the NAN device A itself The value of the AMBTT is updated to the value of the AMBTT in the sync beacon message; if the value of the AMBTT of the NAN device A itself is greater than the value of the AMBTT in the sync beacon message, the NAN device A does not process.
- step 305 if the MR value carried in the sync beacon message is greater than the MR value of the NAN device A itself, when the NAN device A is currently in the master role, the role of the non-master is required to be updated.
- the sync state when the NAN device A is in the non-master role and the state is in the sync state, it needs to update its role to the non-master role, and the state is non-sync state; or
- the HC value carried in the sync beacon message is smaller than the current HC value of the NAN device A, when the NAN device A is currently in the master role, the role of the NAN device A needs to be updated to the non-master role, and the state is still in the sync state. A is currently a non-master role. When the state is sync, you need to update its role to a non-master role with a non-sync state; or
- the NAN device A needs to be updated to the non-master role when the NAN device A is in the master role.
- the state is still in the sync state. A is currently a non-master role.
- FIG. 7 is a beacon transmission and anchor information after the NAN device setting information according to the embodiment of the present invention.
- the first device adds the second cluster after modifying the backoff interval, and sends a synchronization beacon message in the second cluster.
- the role of the NAN device A is set to master, and when the state is the sync state, the newly defined backoff interval can be adopted, and the newly defined backoff interval is larger than the retreat interval before the modification.
- [0,15] such as [0, 50] or other larger interval [0, X], where X is greater than 15 or greater than 31, but X is less than the length value of DW, such that the newly defined backoff interval is greater than before modification The retreat interval.
- the multiple NAN devices in the cluster 1 are added to the cluster 2 by the master role because they receive the beacon message sent by the NAN device A.
- the NAN device of the master role in the cluster 2 contends to send the sync beacon message.
- the larger the backoff interval of the new definition is used, the probability that the number of backoffs randomly selected by multiple master roles is reduced, and the synchronization can be effectively reduced.
- the first device carries the information in the current anchor master record set in step 303 when sending the sync beacon message.
- the first device after being added to the second cluster, receives the sync beacon message sent by the other NAN devices in the second cluster. Therefore, the foregoing method further includes:
- the first device When receiving the synchronization beacon message sent by the other device in the second cluster, the first device sets the anchor information of the first device according to the synchronization beacon message in the role of the primary device.
- step 310 The specific implementation of the step 310 is similar to the step 308, and details are not described herein again.
- the first device when the first device receives the synchronization beacon message or the discovery beacon message including the cluster information of the second cluster, the first device may be in a broadcast form in the DW of the first cluster. Send a sync beacon message in the sync beacon message
- the cluster information of the second cluster is included, so that the device in the first cluster that hears the sync beacon message can also join the second cluster.
- the synchronization beacon message or the discovery beacon message that may be sent from the second device in the second cluster may also come from the first cluster.
- the prior art only diffuses the cluster information of the second cluster in a broadcast manner, which may cause some NAN devices in the first cluster to receive no message, that is, the propagation range is limited.
- the first device receives the second information, a message sent by the second device of the cluster, and the first device belongs to the at least one NDC in the first cluster, where the first device needs to send an NDC message in the at least one NDC, where the NDC message includes the cluster information of the second cluster, so that The device that hears the NDC message in the at least one NDC in a cluster joins the second cluster; or, when the first device receives the NDC message sent by the third device in the NDC in which the first device is located, the first device The NDC message may also be sent in multiple NDCs in which the device is located, so that the devices in the multiple NDCs are added to the second cluster; or the first device may also broadcast the fourth device in the first cluster.
- FIG. 8 is a schematic flowchart of a cluster information diffusion method after the NAN device setting information according to an embodiment of the present invention.
- the following steps 311-313 are performed after the foregoing step 303, and are performed before the foregoing steps 304-305 or steps 306-308 or steps 309-310.
- the method further includes:
- the first device in the first cluster receives the first cluster information from the second device of the second cluster, and the first device is in the at least one NDC, the first device determines to send the second cluster in the at least one NDC.
- the second cluster information includes at least one of the information set by the first device.
- the NAN device A in the cluster 1 receives the sync beacon message or the discovery beacon message sent by the NAN device B in the cluster 2.
- the message includes the information of the cluster 2, that is, the first cluster information, including the cluster ID, the AMR, the TSF, and the like. One or more of AMBTT and HC. If the NAN device A is in multiple NDCs in the Cluster 1, the NAN device A is in the management window of the plurality of NDCs after setting the information of the NAN device A itself according to the first cluster information. Sending the second cluster information of the second cluster, the second cluster information including at least one of the information set by the NAN device A.
- the message that the NAN device A sends the second cluster information may be a sync beacon message or an announcement frame message.
- the NAN device A is sent in multiple NDC management windows, that is, not only in the management window of the NDC1 to which the NAN device A belongs, but also It is transmitted in the management window of NDC2 or the like to which the NAN device A belongs
- the format of the sync beacon message or the announcement frame message may be an existing sync beacon message format, an action message format, or a service discovery frame (SDF) message format, or a newly defined message format. .
- SDF service discovery frame
- the method further includes:
- the first device If the first device has received the second cluster information of the second cluster sent by any other device in the first cluster, the first device cancels sending the second cluster information in some or all of the NDCs in the at least one NDC. .
- the NAN device A can be prevented from repeatedly transmitting the information of Cluster2 in Cluster1, thereby saving air interface overhead.
- the first device may determine, by comparing the information carried in the second cluster information sent by the any device with the information set by the first device. For example, if the first AMBTT set in step 303 is smaller than the fourth AMBTT carried in the second cluster information, or the first HC is greater than the fourth HC carried in the second cluster information, or the first AMR is smaller than the second cluster information.
- the fourth AMR carried, or the device ordering MR of the first device is smaller than the MR of any device, or the HC of the first device is greater than the HC of the device itself, the first device cancels sending the first in at least one NDC. Cluster information.
- the second cluster information may further include a time information that the first device is to join the second cluster.
- Information, or time period information to inform the NAN device in the NDC that the first device joins the second cluster when the time period information arrives, so that the devices in the NDC can be added to the second cluster at the same time.
- the first device is communicating with other devices in the NDC, such as chatting, and the other devices will not affect the ongoing service when they join the second cluster at the same time.
- the first device updates at least one of an NDC management window, an NDC data link NDL information, a group key, and a device identifier of the first device.
- the NAN device A modifies its own NDC management window to the management window of the DW in Cluster2.
- the original NDC management window is the start time of the NDC management window to the offset1 of the DW of Cluster1
- the modified NDC management window is the start time of the NDC management window to the offset2 of the DW of Cluster2.
- the AMBTT ie, the AMBTT of Cluster 2
- the offset can be described in the form of a bitmap.
- the bitmap in the bit table is set to 1 to indicate that the time unit is available.
- the NAN device A When the bitmap is set to 0 or blank, the NAN device A enters sleep during the time period indicated by the time unit. status. As shown in Table 1, with 16 TUs as the minimum time unit for the device to work on a certain channel, within each 16 TU, the NAN device A is in a sleep state or works on a certain channel, and the position in the bit table is 1. The location acts as the NDC management window for NAN device A, and NAN device A is awake during this time period.
- the NDL is a time-frequency resource negotiated between NAN devices, including channel and time
- the NDL information that is, the NDL schedule
- the NDL schedule can be modified according to the bit table of the NDC management window.
- the NAN devices may use the same group ID as a group, or may be a group of NAN devices supporting the same service, or a group of NAN devices belonging to the same geographic location, or multiple.
- a group of NAN devices that need to communicate with each other is not limited in this application.
- the group key may be generated based on the first 4 octets of the TSF, ie, the first 4 bytes, and the group key may be updated in combination with the first 4 bytes of the TSF as part of the group key.
- the device identifier (service identity) of the NAN device A in the cluster 2 needs to be updated, and the HSR operation may be performed at least in combination with the partial information of the TSF and the device name to generate a new SID. Or, at least the partial information of the group key and the device name are hashed to generate a new SID, etc., which is not limited in this application.
- the NAN device A diffuses the cluster information of the second cluster in the NDC in the cluster 1, the propagation range of the cluster information of the second cluster is expanded, and the cluster information can be transmitted faster through the NDC.
- FIG. 9 is a schematic flowchart of a cluster information diffusion method after setting information of a NAN device according to an embodiment of the present invention.
- the above steps 311 to 313 can also be replaced by 314 to 316:
- the first device in the first cluster receives the message from the third device of the first cluster, the first device determines to send the second in the remaining NDCs except the first NDC in all the NDCs in which the first device is located.
- the second cluster information of the cluster including at least one of the information set by the first device.
- the third device Since the third device is in the first NDC of the first cluster in step 301, it is recorded as NDC1 at this time, that is, if the first device is the first cluster information received by the device in the NDC1 where the device itself is located. After the first device sets its own information according to the first cluster information, the first device also needs to be in addition to NDC1 in the NDC in which it is located.
- the second cluster information of the second cluster is sent in the remaining NDC (for example, NDC2), and the second cluster information includes at least one of the information set by the first device.
- the message format used by the first device to send the second cluster information may be as described in step 311, and details are not described herein again.
- the first device cancels sending the second cluster information in the remaining NDCs.
- the second cluster information can be prevented from being repeatedly sent in the NDC where the first device is located, which saves air interface resources.
- the first device updates at least one of an NDC management window, an NDC data link NDL information, a group key, and a device identifier of the first device.
- FIG. 10 is a schematic flowchart of a cluster information diffusion method after NAN device setting information according to an embodiment of the present invention. Steps 311-313 or steps 314-316 may also be replaced with steps. 317 ⁇ 318:
- the first device of the first cluster receives the message from the fourth device of the first cluster, the first device determines to send the second cluster information of the second cluster in the first cluster, where the second cluster information includes the first device. At least one of the set information.
- the fourth device may broadcast the first cluster information in the first cluster, the first device.
- the second cluster information of the second cluster may be broadcast in the first cluster, where the second cluster information includes the first device setting. At least one of the information, so that other devices in the first cluster that receive the second cluster information can also be added to the second cluster, wherein the message format adopted can be as illustrated in step 311, and is no longer here. Narration.
- the first device cancels sending the second cluster information in the first cluster.
- the first cluster information can be prevented from being repeatedly transmitted in the first cluster, thereby saving air interfaces. Resources.
- the information of the first device itself may be set according to the first cluster information of the second cluster, so that After a device is added to the second cluster, it can be interconnected with the devices in the second cluster in time. Further, after the first device joins the second cluster, whether to send the synchronization beacon message in the second cluster is determined according to the information set by the first device, so as to avoid adding more to the second cluster. The devices send synchronization beacon messages in the second cluster and collide, causing the devices in the second cluster to not receive the message.
- the first device may also broadcast the first cluster or send the set information in the NDC where the first device is located, so that the device that hears the information also joins the second.
- the propagation range of the cluster information of the second cluster can be expanded, and the cluster information can be transmitted faster by the NDC.
- the embodiment of the present invention further provides a first device 11, where the first device 11 is located in the proximity sensing network NAN, as shown in FIG.
- the receiving unit 111 is configured to receive a message, where the message includes the first cluster information of the second cluster;
- a first determining unit 112 configured to: when joining the second cluster, send a synchronization beacon message in the second cluster according to the role and state of the first device in the first cluster;
- a transmitting unit 113 (not shown) for transmitting the synchronization beacon message in the second cluster after modifying the backoff interval.
- the first determining unit 112 is configured to: if the role and status of the first device in the first cluster is a primary device or a non-primary device, and the state is a synchronous state, the first device sends a synchronization message in the second cluster. Standard message.
- the setting unit 113 is configured to set information of the first device according to the first cluster information before the first device sends the synchronization beacon message.
- the receiving unit 111 can be used to:
- the third device is in the first NAN data cluster NDC of the first cluster, and the message includes the first cluster information of the second cluster;
- the first cluster information includes at least one of a cluster identifier of the second cluster, a first anchor master ordering AMR, a first anchor master beacon transmission time AMBTT, a first time synchronization function TSF, and a first hop count HC. .
- the setting unit 113 can be used to:
- the cluster identifier of the first device is a cluster identifier of the second cluster
- the anchor master information includes at least one of a second AMR, a second AMBTT, and a second HC, the value of the second AMR is the same as the value of the first AMR, and the value of the second AMBTT is the same as the value of the first AMBTT, the second HC The value of the first HC is increased by one;
- the second TSF is the same as the first TSF
- the role of the first device is the master device, and the state is the synchronization state by default; or the role and state of the first device are the same as the role and state of the first device in the first cluster; or the role and state after the first device is set is According to at least one of the information before the first device setting is compared with at least one of the first cluster information, the information before the setting includes the primary device ranking MR before the first device setting, the HC before setting, and the setting before AMBTT.
- the receiving unit 111 can be used to:
- the message includes the first cluster information of the second cluster;
- the acquiring unit 114 is further configured to: obtain the MR of the second device if the first device receives the message from the second device;
- the first device receives the message from the fourth device, acquiring the MR of the fourth device.
- the first determining unit 112 is configured to determine, after joining the second cluster, whether to send the synchronization beacon message in the second cluster.
- the role and state of the first device are set to be the same as the role and state of the first device in the first cluster, if the configured role is a primary device or a non-primary device, and the state is a synchronous state, it is determined that Sending a synchronization beacon message in the second cluster;
- the set role is a non-master device and the state is an unsynchronized state, it is determined that the synchronization beacon message is not sent in the second cluster.
- the method further includes:
- a recording unit 115 is configured to record a role and a state of the first device in the first cluster when the role of the first device is set as the master device;
- the first determining unit 112 is configured to:
- the role of the first device in the first cluster is a master device or a non-master device, and the state is a synchronization state, determining to send a synchronization beacon message;
- the role of the first device in the first cluster is a non-master device and the state is an unsynchronized state, it is determined that the synchronization beacon message is not sent in the second cluster.
- the sending unit 113 may be configured to: when the role of the first device is set as the master device, modify the backoff interval, and the modified backoff interval is greater than the backoff interval before the modification;
- a second determining unit 116 is further included, configured to:
- the first device determines to send the second cluster information of the second cluster, the second cluster information, in the at least one NDC.
- the at least one of the information after the setting of the first device is included.
- it may also include:
- the first canceling unit 117 is configured to cancel sending the second cluster information in the at least one NDC if the first device has received the second cluster information sent by any other device in the first cluster.
- the first canceling unit 117 can be used to:
- the second cluster information is cancelled in at least one NDC.
- the third determining unit 120 may further be configured to:
- the first device receives the message from the third device, determining to send the second cluster information of the second cluster in the remaining NDCs except the first NDC in all the NDCs in which the first device is located, where the second cluster information includes the first At least one of the information after the device is set.
- it may also include:
- the second canceling unit 121 is configured to cancel sending the second cluster information in the remaining NDCs if the first device has received the second cluster information from any of the remaining NDCs.
- the fourth determining unit 130 may further be configured to:
- the first device receives the message from the fourth device, determining to send the second cluster information of the second cluster in the first cluster, where the second cluster information includes at least one of the information set by the first device.
- the third canceling unit 131 is further configured to:
- the setting unit 113 is further configured to:
- the information of the first device itself may be set according to the first cluster information of the second cluster, so that the first device is added to the second cluster.
- the devices in the second cluster can be interconnected in time.
- whether to send the synchronization beacon message in the second cluster is determined according to the information set by the first device, so as to avoid adding more to the second cluster.
- the devices send synchronization beacon messages in the second cluster and collide, causing the devices in the second cluster to not receive the message.
- the first device may also broadcast the first cluster or send the set information in the NDC where the first device is located, so that the device that hears the information also joins the second.
- the propagation range of the cluster information of the second cluster can be expanded, and the cluster information can be transmitted faster by the NDC.
- Fig. 14 is a view showing the structure of the first device involved in the above embodiment.
- the first device may be a NAN device in the network architecture shown in FIG. 1 or 2.
- the first device includes a controller/processor 142 for controlling management of actions of the first device.
- the controller/processor 142 is configured to support the first device to perform the processes 301 and 302 in FIG. 3, 301 to 303 in the process of FIG. 4, and 301, 303, 304, and 305 in the process of FIG. 5, in the process of FIG. 301, 303, 306 ⁇ 308, 301, 303, 309 ⁇ 310 in the process of Figure 7, 301, 303, 311 ⁇ 313 in the process of Figure 8, Figure 9 301, 303, 314-316 in the process, 301, 303, 317-318 in the process of FIG. 10, and/or other processes for the techniques described in the embodiments of the present invention.
- the memory 141 is for storing program codes and data of the first device
- the network interface 143 is for supporting the first device to communicate with its devices in the first cluster or the second cluster.
- network interface 143 is used to support communication between the first device and the various NAN devices shown in FIG. 1 or 2.
- the information of the first device itself may be set according to the first cluster information of the second cluster, so that the first device is added to the second cluster. After that, the devices in the second cluster can be interconnected in time.
- the disclosed apparatus and method may be implemented in other manners.
- the device embodiments described above are merely illustrative.
- the division of the unit is only a logical function division.
- there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
- the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
- each functional unit may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit.
- the above units may be implemented in the form of hardware or in the form of hardware plus software functional units.
- All or part of the steps of implementing the foregoing method embodiments may be performed by hardware related to the program instructions.
- the foregoing program may be stored in a computer readable storage medium, and when executed, the program includes the steps of the foregoing method embodiments;
- the foregoing storage medium includes: a U disk, a mobile hard disk, a read only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. medium.
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Description
Claims (34)
- 一种临近感知网络NAN设备发送同步信标帧的方法,其特征在于,包括:所述NAN中处于第一簇中的第一设备接收消息,所述消息包括第二簇的第一簇信息;所述第一设备加入所述第二簇时,根据所述第一设备在所述第一簇中的角色和状态在所述第二簇中发送同步信标消息。
- 根据权利要求1所述的方法,其特征在于,所述根据所述第一设备在所述第一簇中的角色和状态在所述第二簇中发送同步信标消息包括:若所述第一设备在所述第一簇中的角色和状态为主设备或非主设备,状态为同步状态,则所述第一设备在所述第二簇中发送所述同步信标消息。
- 根据权利要求1所述的方法,其特征在于,在所述第一设备发送所述同步信标消息之前,所述方法还包括:所述第一设备根据所述第一簇信息设置所述第一设备的信息。
- 根据权利要求3所述的方法,其特征在于,所述第一簇信息包括所述第二簇的簇标识、第一锚主设备排序AMR、第一锚主设备信标传输时间AMBTT、第一时间同步功能TSF和第一跳数HC中的至少一项。
- 根据权利要求4所述的方法,其特征在于,所述第一设备根据所述第一簇信息设置所述第一设备的信息包括:所述第一设备设置所述第一设备的簇标识、锚主信息、第二TSF和所述第一设备的角色和状态中的至少一项;其中,所述第一设备的簇标识为所述第二簇的簇标识;所述锚主信息包括第二AMR、第二AMBTT和第二HC中的至少一项,所述第二AMR的值与所述第一AMR的值相同,所述第二AMBTT的值与所述第一AMBTT的值相同,所述第二HC的值为所述第一HC的值加1;所述第二TSF与所述第一TSF相同;所述第一设备的角色为主设备,状态默认为同步状态;或者,所述第一设备的角色和状态与所述第一设备在所述第一簇中的角色 和状态相同;或者所述第一设备设置后的角色和状态是根据所述第一设备设置前的信息中的至少一个与所述第一簇信息中的至少一个进行比较确定的,所述设置前的信息包括所述第一设备设置前的助主设备排名MR、设置前的HC和设置前的AMBTT。
- 根据权利要求5所述的方法,其特征在于,所述NAN中处于第一簇中的第一设备接收消息,所述消息包括第二簇的第一簇信息包括:所述第一设备接收所述第二簇中的第二设备发送的消息,所述消息包括所述第二簇的第一簇信息;或所述第一设备接收所述第一簇中的第三设备发送的消息,所述第三设备处于所述第一簇的第一NAN数据簇NDC中,所述消息包括所述第二簇的第一簇信息;或所述第一设备接收所述第一簇中的第四设备发送的消息,所述消息包括所述第二簇的第一簇信息。
- 根据权利要求6所述的方法,其特征在于,在所述第一设备设置所述第一设备的信息之前,所述方法还包括:若所述第一设备从所述第二设备接收的所述消息,则所述第一设备获取所述第二设备的MR;若所述第一设备从所述第三设备接收的所述消息,则所述第一设备获取所述第三设备的MR;若所述第一设备从所述第四设备接收的所述消息,则所述第一设备获取所述第四设备的MR。
- 根据权利要求5所述的方法,其特征在于,所述根据所述第一设备在所述第一簇中的角色和状态确定是否在第二簇中发送同步信标消息包括:当设置所述第一设备的角色和状态与所述第一设备在第一簇中的角色和状态相同时,若设置后的所述角色为所述主设备或非主设备,状态为同步状态,则所述第一设备确定在所述第二簇中发送所述同步信标消息;若设置后的所述角色为非主设备,且所述状态为不同步状态,则所述第一设备确定不在所述第二簇中发送所述同步信标消息。
- 根据权利要求5所述的方法,其特征在于,所述方法还包括:当设置所述第一设备的角色为所述主设备时,所述第一设备记录所述第一设备在所述第一簇中时的角色和状态;所述根据所述第一设备在所述第一簇中的角色和状态确定是否在所述第二簇中发送同步信标消息包括:若所述第一设备在所述第一簇中时的角色为所述主设备或非主设备,状态为同步状态,则所述第一设备确定发送所述同步信标消息;若所述第一设备在第一簇中时的角色为所述非主设备,且所述状态为不同步状态,则所述第一设备确定不在所述第二簇中发送所述同步信标消息。
- 根据权利要求6或7所述的方法,其特征在于,所述方法还包括:若所述第一设备接收到所述第二设备发送的所述消息,且所述第一设备处于至少一个NDC中,则所述第一设备确定在所述至少一个NDC中发送所述第二簇的第二簇信息,所述第二簇信息包括所述第一设备设置后的信息中的至少一项。
- 根据权利要求10所述的方法,其特征在于,所述方法还包括:若所述第一设备已接收到所述第一簇中的其它任一设备发送的所述第二簇信息,则所述第一设备取消在所述至少一个NDC中发送所述第二簇信息。
- 根据权利要求11所述的方法,其特征在于,所述第一设备取消在所述至少一个NDC中发送所述第二簇信息包括:所述第一设备比较所述任一设备发送的所述第二簇信息中携带的信息与所述第一设备设置后的信息;若所述第一AMBTT小于所述第二簇信息中携带的第四AMBTT,或所述第一HC大于所述第二簇信息中携带的第四HC,或所述第一AMR小于所述第二簇信息中携带的第四AMR,或所述第一设备的设备排序MR小于所述任一设备的MR,则所述第一设备取消在所述至少一个NDC中发送所述第二簇信息。
- 根据权利要求6或7所述的方法,其特征在于,所述方法还包括:若所述第一设备从所述第三设备接收的所述消息,则所述第一设备确定在所述第一设备所处的所有NDC中除所述第一NDC以外的其余NDC中发送所述第二簇的第二簇信息,所述第二簇信息包括所述第一设备设置后的信息中的至少一项。
- 根据权利要求13所述的方法,其特征在于,所述方法还包括:若所述第一设备已从所述其余NDC中的任一NDC接收到所述第二簇信息,则所述第一设备取消在所述其余NDC中发送所述第二簇信息。
- 根据权利要求6或7所述的方法,其特征在于,所述方法还包括:若所述第一设备从所述第四设备接收的所述消息,则所述第一设备确定在所述第一簇中发送所述第二簇的第二簇信息,所述第二簇信息包括所述第一设备设置后的信息中的至少一项。
- 根据权利要求15所述的方法,其特征在于,所述方法还包括:若所述第一设备已接收到所述第一簇中的任一设备发送的所述第二簇信息,则所述第一设备取消在所述第一簇中发送所述第二簇信息。
- 根据权利要求10至16任一项所述的方法,其特征在于,所述方法还包括:所述第一设备更新所述第一设备的NDC管理窗口、NDC数据链接NDL信息、组密钥以及设备标识中的至少一个。
- 一种第一设备,所述第一设备处于临近感知网络NAN中,其特征在于,包括:接收单元,用于接收消息,所述消息包括第二簇的第一簇信息;第一确定单元,用于加入所述第二簇时,根据所述第一设备在所述第一簇中的角色和状态在所述第二簇中发送同步信标消息。
- 根据权利要求18所述的第一设备,其特征在于,所述第一确定单元用于:若所述第一设备在所述第一簇中的角色和状态为主设备或非主设备,状态为同步状态,则在所述第二簇中发送所述同步信标消息。
- 根据权利要求18所述的第一设备,其特征在于,还包括:设置单元,用于在所述第一设备发送所述同步信标消息之前,根据所述第一簇信息设置所述第一设备的信息。
- 根据权利要求20所述的第一设备,其特征在于,所述第一簇信息包括所述第二簇的簇标识、第一锚主设备排序AMR、第一锚主设备信标传输时间AMBTT、第一时间同步功能TSF和第一跳数HC中的至少一项。
- 根据权利要求21所述的第一设备,其特征在于,所述设置单元用于:设置所述第一设备的簇标识、锚主信息、第二TSF和所述第一设备的角色和状态中的至少一项;其中,所述第一设备的簇标识为所述第二簇的簇标识;所述锚主信息包括第二AMR、第二AMBTT和第二HC中的至少一项,所述第二AMR的值与所述第一AMR的值相同,所述第二AMBTT的值与所述第一AMBTT的值相同,所述第二HC的值为所述第一HC的值加1;所述第二TSF与所述第一TSF相同;所述第一设备的角色为主设备,状态默认为同步状态;或者,所述第一设备的角色和状态与所述第一设备在所述第一簇中的角色和状态相同;或者所述第一设备设置后的角色和状态是根据所述第一设备设置前的信息中的至少一个与所述第一簇信息中的至少一个进行比较确定的,所述设置前的信息包括所述第一设备设置前的助主设备排名MR、设置前的HC和设置前的AMBTT。
- 根据权利要求22所述的第一设备,其特征在于,所述接收单元用于:接收所述第二簇中的第二设备发送的消息,所述消息包括所述第二簇的第一簇信息;或接收所述第一簇中的第三设备发送的消息,所述第三设备处于所述第一簇的第一NAN数据簇NDC中,所述消息包括所述第二簇的第一簇信息;或接收所述第一簇中的第四设备发送的消息,所述消息包括所述第二簇的第一簇信息。
- 根据权利要求23所述的第一设备,其特征在于,在所述第一设备设置所述第一设备的信息之前,还包括获取单元,用于:若所述第一设备从所述第二设备接收的所述消息,则获取所述第二设备的MR;若所述第一设备从所述第三设备接收的所述消息,则获取所述第三设备的MR;若所述第一设备从所述第四设备接收的所述消息,则获取所述所述第四设备的MR。
- 根据权利要求22所述的第一设备,其特征在于,所述第一确定单元用于:当设置所述第一设备的角色和状态与所述第一设备在第一簇中的角色和状态相同时,若设置后的所述角色为所述主设备或非主设备,状态为同步状态,则确定在所述第二簇中发送所述同步信标消息;若设置后的所述角色为非主设备,且所述状态为不同步状态,则确定不在所述第二簇中发送所述同步信标消息。
- 根据权利要求22所述的第一设备,其特征在于,还包括:记录单元,用于当设置所述第一设备的角色为所述主设备时,记录所述第一设备在所述第一簇中时的角色和状态;所述第一确定单元用于:若所述第一设备在所述第一簇中时的角色为所述主设备或非主设备,状态为同步状态,则确定发送所述同步信标消息;若所述第一设备在第一簇中时的角色为非主设备,且所述状态为不同步状态,则确定不在所述第二簇中发送所述同步信标消息。
- 根据权利要求23或24所述的第一设备,其特征在于,还包括第二确定单元,用于:若所述第一设备接收到所述第二设备发送的第一簇信息,且所述第一设备处于至少一个NDC中,则所述第一设备确定在所述至少一个NDC中发送所述第二簇的第二簇信息,所述第二簇信息包括所述第一设备设置后的信息中的至少一项。
- 根据权利要求27所述的第一设备,其特征在于,还包括:第一取消单元,用于若所述第一设备已接收到所述第一簇中的 其它任一设备发送的所述第二簇信息,则取消在所述至少一个NDC中发送所述第二簇信息。
- 根据权利要求28所述的第一设备,其特征在于,所述第一取消单元用于:比较所述任一设备发送的所述第二簇信息中携带的信息与所述第一设备设置后的信息;若所述第一AMBTT小于所述第二簇信息中携带的第四AMBTT,或所述第一HC大于所述第二簇信息中携带的第四HC,或所述第一AMR小于所述第二簇信息中携带的第四AMR,或所述第一设备的设备排序MR小于所述任一设备的MR,则取消在所述至少一个NDC中发送所述第二簇信息。
- 根据权利要求23或24所述的第一设备,其特征在于,还包括第三确定单元,用于:若所述第一设备从所述第三设备接收的所述消息,则确定在所述第一设备所处的所有NDC中除所述第一NDC以外的其余NDC中发送所述第二簇的第二簇信息,所述第二簇信息包括所述第一设备设置后的信息中的至少一项。
- 根据权利要求30所述的第一设备,其特征在于,还包括:第二取消单元,用于若所述第一设备已从所述其余NDC中的任一NDC接收到所述第二簇信息,则取消在所述其余NDC中发送所述第二簇信息。
- 根据权利要求23或24所述的第一设备,其特征在于,还包第四确定单元,用于:若所述第一设备从所述第四设备接收的所述消息,则确定在所述第一簇中发送所述第二簇的第二簇信息,所述第二簇信息包括所述第一设备设置后的信息中的至少一项。
- 根据权利要求32所述的第一设备,其特征在于,还包括第三取消单元,用于:若所述第一设备已接收到所述第一簇中的任一设备发送的所述第二簇信息,则取消在所述第一簇中发送所述第二簇信息。
- 根据权利要求27至33任一项所述的第一设备,其特征在于,所述设置单元还用于:更新所述第一设备的NDC管理窗口、NDC数据链接NDL信息、组密钥以及设备标识中的至少一个。
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SG11201809571QA SG11201809571QA (en) | 2016-03-28 | 2016-03-28 | Method for sending sync beacon message by nan device, and device |
US16/088,951 US11140644B2 (en) | 2016-03-28 | 2016-03-28 | Method for sending sync beacon message by NAN device, and device |
CN201680080776.6A CN108605300A (zh) | 2016-03-28 | 2016-03-28 | 一种nan设备发送同步信标消息的方法和设备 |
CA3019360A CA3019360C (en) | 2016-03-28 | 2016-03-28 | Method for sending sync beacon message by nan device, and device |
AU2016401125A AU2016401125A1 (en) | 2016-03-28 | 2016-03-28 | Method for sending sync beacon message by nan device, and device |
PCT/CN2016/077566 WO2017166032A1 (zh) | 2016-03-28 | 2016-03-28 | 一种nan设备发送同步信标消息的方法和设备 |
KR1020187031041A KR20180126050A (ko) | 2016-03-28 | 2016-03-28 | Nan 장치가 싱크 비콘 메시지를 송신하기 위한 방법, 및 장치 |
EP16895813.0A EP3429283A4 (en) | 2016-03-28 | 2016-03-28 | METHOD AND DEVICE FOR NAN DEVICE FOR SENDING A SYNCHRONIZATION BEACON MESSAGE |
BR112018069734A BR112018069734A2 (pt) | 2016-03-28 | 2016-03-28 | método e dispositivo para enviar mensagem de beacon de sincronização por um dispositivo nan |
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US10575268B2 (en) * | 2017-05-15 | 2020-02-25 | Apple Inc. | NAN solicited synchronization |
US10721698B2 (en) | 2017-07-01 | 2020-07-21 | ARRIS Enterprises, LLC | Identifying a synchronization master for radio nodes |
JP2019083481A (ja) * | 2017-10-31 | 2019-05-30 | キヤノン株式会社 | 通信装置、制御方法、およびプログラム |
JP7130364B2 (ja) * | 2017-10-31 | 2022-09-05 | キヤノン株式会社 | 通信装置、制御方法、およびプログラム |
CN111954194B (zh) * | 2020-08-12 | 2023-12-05 | 深圳市蓝信物联科技有限公司 | 基于物联网的无线智能标签刷新控制方法及装置 |
WO2024096530A1 (ko) * | 2022-11-03 | 2024-05-10 | 삼성전자 주식회사 | Nan 통신의 클러스터들을 병합하기 위한 전자 장치 및 그 동작 방법 |
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WO2015021780A1 (zh) * | 2013-08-13 | 2015-02-19 | 华为终端有限公司 | 用于加入邻近感知网络设备群的方法、设备及系统 |
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US9432925B2 (en) * | 2013-08-05 | 2016-08-30 | Nokia Technologies Oy | Method, apparatus, and computer program product for hop count usage in cluster selection |
CN104053227B (zh) | 2013-12-02 | 2017-06-27 | 华为终端有限公司 | 一种用于锚主设备选择的方法和设备 |
JP2018528680A (ja) | 2015-08-18 | 2018-09-27 | 華為技術有限公司Huawei Technologies Co.,Ltd. | アンカーマスターam管理方法およびノード |
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CA3019360A1 (en) | 2017-10-05 |
SG11201809571QA (en) | 2018-12-28 |
EP3429283A1 (en) | 2019-01-16 |
US20190124611A1 (en) | 2019-04-25 |
AU2016401125A1 (en) | 2018-10-25 |
EP3429283A4 (en) | 2019-03-06 |
BR112018069734A2 (pt) | 2019-02-05 |
CA3019360C (en) | 2020-03-10 |
CN108605300A (zh) | 2018-09-28 |
US11140644B2 (en) | 2021-10-05 |
KR20180126050A (ko) | 2018-11-26 |
RU2018137577A (ru) | 2020-04-29 |
RU2018137577A3 (zh) | 2020-04-29 |
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