CN111132304B - Whole network synchronization method and device of ad hoc network, terminal and storage medium - Google Patents
Whole network synchronization method and device of ad hoc network, terminal and storage medium Download PDFInfo
- Publication number
- CN111132304B CN111132304B CN201911417691.4A CN201911417691A CN111132304B CN 111132304 B CN111132304 B CN 111132304B CN 201911417691 A CN201911417691 A CN 201911417691A CN 111132304 B CN111132304 B CN 111132304B
- Authority
- CN
- China
- Prior art keywords
- frame
- node
- synchronization
- network
- hoc network
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
- H04W56/002—Mutual synchronization
-
- 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
Abstract
A method and a device for synchronizing the whole ad hoc network, a terminal and a storage medium are provided, wherein the method comprises the following steps: sending a synchronous leading frame to surrounding adjacent nodes, wherein the synchronous leading frame is used for realizing the time-frequency domain synchronization of both communication parties, and the synchronous leading frame comprises the indication information of a system message frame; sending the system message frame to surrounding adjacent nodes according to the indication information so as to enable the surrounding adjacent nodes to realize network frame synchronization according to the system message frame; when each node in the ad hoc network realizes network frame synchronization, the ad hoc network realizes the whole network synchronization. By the scheme, the success rate of point-to-point communication in the ad hoc network and the network efficiency can be effectively improved.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for synchronizing a whole ad hoc network, a terminal, and a storage medium.
Background
In conventional communication between a base station and a terminal, a Synchronization Information frame with a System frame number and network Information is generally transmitted continuously by the base station, such as a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS), a Master Information Block (MIB) and a System Information Block (SIB) in a Long Term Evolution (LTE) System, where the PSS/SSS is also called a Primary/Secondary Synchronization channel. Preamble sequences are also present in wireless mesh networks (mesh) to achieve communication synchronization.
However, a symmetric transmission mode is adopted among nodes in a point-to-point ad hoc network of the mesh network, a master control scheduling node similar to a base station does not exist, and meanwhile, the mesh network is a network which transmits through multi-hop relay among the nodes, so that no node can cover all nodes of the whole network with a transmission signal, and synchronization of all nodes of the whole network cannot be realized by adopting a mode of transmitting a synchronization channel by a single point similar to the base station.
Compared with a common wireless network combining a base station and a terminal, the ad hoc network has no central scheduling unit of wireless resources, so that each node in the ad hoc network plays the role of the base station and is also the terminal, generally fixed frequency resources and error correction codes and modulation modes are used, and the sharing of the wireless resources among different nodes is realized by a time division method.
The general ad hoc network point-to-point physical layer adopts the physical layer and the MAC structure of Institute of Electrical and Electronics Engineers (IEEE for short) 802.15.4, IEEE 802.15.4 does not explicitly describe the method of time-frequency and domain synchronization in the whole network, but simply provides synchronization by node to the method of beacon frame forwarding, and some ad hoc networks adopt a non-whole network synchronization method, and the instant synchronization is realized by sending the preamble before the data, but the receiving end must detect the preamble constantly by adopting the method, and because the data is received from the initial synchronization state every time, the receiving success rate is also affected, and the data sent by different nodes each time has no synchronization relationship, which is not beneficial to the autonomous scheduling of time-frequency domain resources in the ad hoc network.
For the ad hoc network system adopting the superframe structure and the frame structure of the IEEE 802.15.4 protocol, the communication is usually performed in a manner of performing real-time-frequency domain synchronization or forwarding a beacon frame to realize local time slot synchronization by a currently transmitted data frame preamble sequence, and these schemes have a certain influence on the success rate of point-to-point communication because of no uniform whole network synchronization scheme, and cannot perform real-time active neighbor node measurement, which is easy to cause transmission collision between nodes and intra-network interference.
Disclosure of Invention
The technical problem to be solved by the application is how to provide a whole network synchronization method of an ad hoc network, so that the power consumption of nodes can be effectively reduced, mutual interference caused by sending of synchronization signals among different nodes is avoided, the synchronization of the whole network frame boundary is realized, and the whole network can carry out point-to-point single-hop or multi-hop communication on a unified system frame.
In order to solve the foregoing technical problem, an embodiment of the present application provides a method for synchronizing a whole ad hoc network, where the method includes: sending a synchronous leading frame to surrounding adjacent nodes, wherein the synchronous leading frame is used for realizing the time-frequency domain synchronization of both communication parties, and the synchronous leading frame comprises the indication information of a system message frame; sending the system message frame to surrounding adjacent nodes according to the indication information so as to enable the surrounding adjacent nodes to realize network frame synchronization according to the system message frame; when each node in the ad hoc network realizes network frame synchronization, the ad hoc network realizes the whole network synchronization.
Optionally, the sending time of the synchronous superframe of each node in the ad hoc network is periodic, each period is divided into a plurality of time segments, the divided time segments are numbered according to the time sequence to obtain a system frame number, and each node in the ad hoc network has a corresponding relationship with the system frame number; and the synchronous leading frame and the system message frame are contained in the same synchronous superframe, and each node in the ad hoc network sends a synchronous superframe at the system frame number corresponding to the node.
Optionally, when the sending node is a management node of the ad hoc network, the system frame number corresponding to the sending node is zero.
Optionally, when the sending node is a non-management node, the system frame number corresponding to the sending node is obtained according to the identification number of the sending node in the ad hoc network; the identification number of each node is a mark number distributed by the management node when the node accesses the network, and each node corresponds to a unique identification number.
Optionally, the identification number of each node in the ad hoc network is part or all bits of a temporary address of each node in the ad hoc network, and part or all bits of a hardware address of each node.
Optionally, the synchronization preamble frame includes a part of a current system frame number of the network, and the system message frame includes the remaining or all of the current system frame number of the network.
Optionally, the synchronization preamble frame and the system message frame are sent in a synchronization channel.
Optionally, the synchronization signal frame includes a primary synchronization signal frame and a secondary synchronization signal frame; the main synchronization signal frame is used for realizing the initial synchronization of both communication parties; and the auxiliary synchronization signal frame is used for realizing the accurate synchronization of both communication parties.
The embodiment of the present application further provides a method for synchronizing a whole ad hoc network, where the method includes: receiving a synchronous leading frame sent by a sending node, and realizing time-frequency domain synchronization with the sending node according to the synchronous leading frame, wherein the synchronous leading frame comprises indication information of a system message frame; receiving a system message frame sent by the sending node according to the indication information, and realizing network frame synchronization according to the system message frame; when all nodes in the ad hoc network realize network frame synchronization, the ad hoc network realizes the whole network synchronization.
Optionally, the system message frame includes a current system frame number of a network, and the implementing frame synchronization with the sending node according to the system message frame includes: acquiring the current system frame number of the network from the system message frame; and realizing network frame synchronization according to the current system frame number of the network.
The embodiment of the application provides a whole network synchronizer of ad hoc network, the device includes: a synchronous leading frame sending module, configured to send a synchronous leading frame to surrounding neighboring nodes, where the synchronous leading frame is used to implement time-frequency domain synchronization with the sending node, and the synchronous leading frame includes indication information of a system message frame; a system message frame sending module, configured to send the system message frame to the neighboring nodes according to the indication information, so that each neighboring node realizes frame synchronization with a sending node according to the system message frame, where the sending node is a node that sends the synchronization preamble frame; when all nodes in the ad hoc network realize frame synchronization with respective adjacent nodes, the ad hoc network realizes the whole network synchronization.
The embodiment of the application provides a whole network synchronizer of ad hoc network, the device includes: a synchronous leading frame receiving module, configured to receive a synchronous leading frame sent by a sending node, and implement time-frequency domain synchronization with the sending node according to the synchronous leading frame, where the synchronous leading frame includes indication information of a system message frame; a system message frame receiving module, configured to receive a system message frame sent by the sending node according to the indication information, and implement network frame synchronization according to the system message frame; when all nodes in the ad hoc network realize network frame synchronization, the ad hoc network realizes the whole network synchronization.
The embodiment of the present application further provides a terminal, which includes a memory and a processor, where the memory stores a computer instruction capable of running on the processor, and the processor executes the step of the network wide synchronization method of the ad hoc network when running the computer instruction.
The embodiment of the present application further provides a storage medium, on which computer instructions are stored, and when the computer instructions are executed, the steps of the method for synchronizing the whole ad hoc network are executed.
Compared with the prior art, the technical scheme of the embodiment of the application has the following beneficial effects:
the embodiment of the application provides a method for synchronizing an ad hoc network in a whole network, which comprises the following steps: sending a synchronous leading frame to surrounding adjacent nodes, wherein the synchronous leading frame is used for realizing the time-frequency domain synchronization of both communication parties, and the synchronous leading frame comprises the indication information of a system message frame; sending the system message frame to surrounding adjacent nodes according to the indication information so as to enable the surrounding adjacent nodes to realize network frame synchronization according to the system message frame; when each node in the ad hoc network realizes network frame synchronization, the ad hoc network realizes the whole network synchronization. Compared with the prior art, the method can enable each node to transmit the system message frame carrying the system message for synchronization to the surrounding adjacent nodes, enable the nodes receiving the system message frame to realize network frame synchronization, and then realize the network frame synchronization of each node in a distributed manner through the forwarding of the surrounding adjacent nodes, and finally realize the whole network synchronization of the ad hoc network. Therefore, a whole network synchronization scheme is provided for the ad hoc network system, transmission collision and intra-network interference among nodes of the ad hoc network can be reduced, and the success rate of point-to-point communication in the ad hoc network and the network efficiency are effectively improved.
Further, the transmission time of the synchronous superframe of each node in the ad hoc network has periodicity, which can be referred to as a synchronization period. In the ad hoc network system, a uniform timing system is defined for the ad hoc network by taking a system frame as a unit, and relatively fixed synchronous superframe sending time is set for each node in the ad hoc network in a mode of dividing and numbering a synchronous period. Each node in the ad hoc network system can send, receive and forward synchronous superframes orderly, so that a stable whole network synchronization mechanism in the ad hoc network system is realized. Each node only sends a specific system frame in each synchronization period to send a synchronous superframe, because the synchronous superframe is not continuously sent, the power consumption of each node is not large, and because each node sends the synchronous superframe, the distributed overall coverage of the whole ad hoc network can be realized.
Further, the functions of the management node and the non-management node in the ad hoc network can be different, so as to specify different system frame number corresponding relations. In addition, for the non-management nodes in the ad hoc network, according to the distribution forwarding synchronization mode in the ad hoc network, when the non-management nodes enter the network, temporary addresses or hardware addresses are allocated to the non-management nodes, and the system frame numbers of the non-management nodes sending the synchronous superframes are automatically associated according to the temporary addresses or the hardware addresses of the nodes.
Further, the synchronization preamble frame may further include a primary synchronization signal frame and a secondary synchronization signal frame, which carry different synchronization information, respectively, to achieve initial synchronization and precise synchronization of both communication parties.
Drawings
Fig. 1 is a schematic flowchart of a full network synchronization method of an ad hoc network according to an embodiment of the present application;
FIG. 2 is a diagram illustrating a synchronous superframe in a synchronization channel according to an example of the present application;
FIG. 3 is a diagram illustrating synchronous superframes between nodes according to an exemplary embodiment of the present invention;
fig. 4 is a schematic flowchart of another network-wide synchronization method for an ad hoc network according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a full-network synchronization apparatus of an ad hoc network in an embodiment of the present application;
fig. 6 is a schematic structural diagram of a synchronization apparatus of another ad hoc network in the embodiment of the present application.
Detailed Description
As background art shows, ad hoc networks in the prior art do not have a uniform whole network synchronization scheme, have a certain influence on the success rate of point-to-point communication, and are prone to cause transmission collision between nodes and intra-network interference.
In order to solve the foregoing technical problem, an embodiment of the present application provides a method for synchronizing a whole ad hoc network, where the method includes: sending a synchronous leading frame to surrounding adjacent nodes, wherein the synchronous leading frame is used for realizing the time-frequency domain synchronization of both communication parties, and the synchronous leading frame comprises the indication information of a system message frame; sending the system message frame to the surrounding adjacent nodes according to the indication information so as to enable the surrounding adjacent nodes to realize network frame synchronization according to the system message frame; when each node in the ad hoc network realizes network frame synchronization, the ad hoc network realizes the whole network synchronization.
Compared with the prior art, the whole network synchronization method of the ad hoc network provided by the technical scheme of the application can effectively improve the success rate of point-to-point communication in the ad hoc network and the network efficiency.
Each node in the ad hoc network may be a device with a communication function, such as a mobile phone, an electric meter, a computer, or the like. In this scheme, a node corresponding to a sending end of a synchronization preamble frame and a system message frame is called a sending node, and a node corresponding to a receiving end is called a receiving node.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 provides a schematic flow chart of a method for synchronizing an ad hoc network in a whole network according to an embodiment of the present application; the method comprises the following steps S101 and S102:
step S101, sending a synchronous leading frame to surrounding adjacent nodes, wherein the synchronous leading frame is used for realizing time-frequency domain synchronization of both communication parties, and the synchronous leading frame comprises indication information of a system message frame.
The synchronization leading frame is used for enabling the two communication parties to realize synchronization in a time domain and a frequency domain, and the synchronization leading frame can also carry indication information used for indicating a subsequent system message frame, so that the two communication parties can correctly transmit the system message frame.
In the ad hoc network, the communication distance of each node is limited, and according to the communication condition of the node, each node can send a synchronization preamble frame to other nodes which can receive the signals sent by the node, wherein the other nodes which can receive the signals sent by the node are called surrounding adjacent nodes of the node.
And step S102, sending the system message frame to surrounding adjacent nodes according to the indication information so as to enable the surrounding adjacent nodes to realize network frame synchronization according to the system message frame.
When each node in the ad hoc network realizes network frame synchronization, the ad hoc network realizes the whole network synchronization.
The system message frame is a data frame which is transmitted to the surrounding adjacent nodes by the transmitting node and is used for enabling the transmitting node and the receiving node to share the synchronous message of the ad hoc network system.
Optionally, the method may be performed by a sending node side in a peer-to-peer communication process, and the sending node may send the synchronization preamble frame and the system message frame to its surrounding neighboring nodes in a broadcast manner.
When the ad hoc network carries out the whole network synchronization, each node can respectively send a system message frame to the surrounding adjacent nodes, the adjacent nodes receive the system message frame and acquire the synchronization message of the ad hoc network system, thereby realizing the network frame synchronization. And then the nodes receiving the system message frame continue to forward the system message frame … to the adjacent nodes until all the nodes in the ad hoc network receive the system message frame sent by the adjacent nodes, and mutually realize frame synchronization based on the same system message, so that the ad hoc network realizes the whole network synchronization.
In this embodiment, each node may transmit a system message frame carrying a system message for synchronization to its neighboring nodes, so that a node receiving the system message frame realizes network frame synchronization, and then forwards the system message frame through the neighboring nodes, thereby realizing network frame synchronization of each node in a distributed manner, and finally realizing the whole network synchronization of the ad hoc network. Therefore, a whole network synchronization scheme is provided for the ad hoc network system, transmission collision and intra-network interference among nodes of the ad hoc network can be reduced, and the success rate of point-to-point communication in the ad hoc network and the network efficiency are effectively improved.
In one example, an ad hoc Network system is provided, in which a Personal Area Network (PAN) coordinator, one or more relay nodes, and one or more terminal nodes of each relay node are included, and the number of PAN coordinators is generally one but not limited thereto. The PAN coordinator is used for maintaining information of all nodes in the ad hoc network system and managing communication relations among all nodes in the ad hoc network. Each relay node and the terminal nodes thereof form a group of communication routes, and the terminal nodes of the relay nodes can communicate with each other through the relay nodes; each relay node can directly or indirectly communicate with the PAN coordinator through other relay nodes to acquire the routing information of the other relay nodes, and terminal nodes belonging to different relay nodes communicate through the different relay nodes. The relay nodes can comprise a primary relay node directly connected with the PAN coordinator, a secondary relay node connected with the primary relay node, … and an n-level relay node connected with the n-1 level relay node, and the terminal node can be directly connected with the PAN coordinator or can be connected with the primary relay node or any other relay node according to the requirement. Wherein n is a positive integer greater than 1.
In the ad hoc network, a PAN coordinator is used as a system message for defining the whole network synchronization, and the PAN coordinator is firstly transmitted to a primary relay node by a system message frame to realize the synchronization of the primary relay node; and the first-stage relay node continuously forwards the system message, and sends the system message to the second-stage relay node in a system message frame, so that the synchronization of the second-stage relay node is continuously realized, …, until the terminal node receives the system message frame of the relay node at the previous stage. Therefore, the ad hoc network system realizes the whole network synchronization.
In one embodiment, the sending time of the synchronous superframe of each node in the ad hoc network is periodic, each period is divided into a plurality of time segments, the divided time segments are numbered according to the time sequence to obtain a system frame number, and each node in the ad hoc network has a corresponding relation with the system frame number; and the synchronous leading frame and the system message frame are contained in the same synchronous superframe, and each node in the ad hoc network sends a synchronous superframe at the system frame number corresponding to the node.
The synchronization preamble frame and the system message frame transmitted by the transmitting node to the receiving node may be collectively referred to as a synchronization superframe, which is periodically transmitted. A common timing unit, called a system frame, may be defined in the ad hoc network, and the transmission period per superframe may be several system frames. That is, in a synchronization period, the system frame counts from 0 frame to T frame (T is a variable natural number, for example, T may be 256, 512, etc.); after a synchronization period is finished, the next synchronization period is entered, and the system frame counts from 0 frame to T frame again.
Optionally, the sending period of the synchronous superframe of each node may be set uniformly, that is, in each sending period, each node in the ad hoc network may send its own synchronous superframe, and the time sequence relationship of each node sending its own synchronous superframe in each period is represented by its corresponding system frame number.
Each node in the ad hoc network has a fixed time period for sending the synchronous superframe in a single synchronous period, and the time for each node to send the synchronous superframe in the single synchronous period is represented by the system frame number of the node. Generally, the smaller the system frame number, the earlier the corresponding time is within the synchronization period.
In this embodiment, each node only transmits a specific system frame in each synchronization period, and since the system frame is not continuously transmitted, power consumption of each node is not large, and since each node transmits a synchronization superframe, distributed overall coverage of the entire ad hoc network can be achieved.
Optionally, a fixed carrier frequency may be set as a synchronization channel, and each node in the ad hoc network sends a synchronization superframe in the synchronization channel. Therefore, the synchronous superframe is transmitted by bearing the physical carrier, and the resource occupation of the physical channel in the ad hoc network is reduced.
Referring to fig. 2, fig. 2 is a diagram illustrating a structure of a synchronization superframe in a synchronization channel according to an example; in the synchronous channel, the sending period of each node of the ad hoc network sending the synchronous superframe is T, and each node sequentially sends the synchronous superframe to the adjacent nodes around the node in the synchronous channel.
In this embodiment, the sending time of the synchronous superframe of each node in the ad hoc network has periodicity, which may be referred to as a synchronization period T. In the ad hoc network system, a uniform timing system is defined for the ad hoc network by taking a system frame as a unit, and the sending time of a relatively fixed synchronous superframe is set for each node in the ad hoc network in a mode of dividing and numbering a synchronous period. Each node in the ad hoc network system can send, receive and forward synchronous superframes orderly, so that a stable whole network synchronization mechanism in the ad hoc network system is realized.
Nodes inside or outside the ad hoc network can realize frame synchronization with the ad hoc network by continuously scanning a synchronization channel as long as the nodes can synchronize to a synchronous superframe of any frame, and acquire a corresponding system frame number and network information. To avoid interference collisions of the synchronization channel with the data channel, the synchronization channel may use a different carrier frequency than the data channel.
In one embodiment, when the sending node is a management node of the ad hoc network, a system frame number corresponding to the sending node is zero.
For the ad hoc network system, a management node may be defined for managing the communication route in the ad hoc network, the hierarchical relationship of the nodes, and the definition of the synchronization mechanism, etc. of the attribute information common to the whole network in the ad hoc network. The management node may refer to the PAN coordinator in the above example.
At this time, the management node in the ad hoc network may be used as an initial node of the full network synchronization, and the time when the management node sends the synchronization super frame may be the first time period in the synchronization period, where the system frame number is zero (or 0). Namely, a synchronous superframe occupying a plurality of system frames is transmitted at the moment when the system frame number SFN is 0,
in one embodiment, when the sending node is a non-management node, the system frame number corresponding to the sending node is obtained according to the identification number of the sending node in the ad hoc network; the identification number of each node is a mark number distributed by the management node when the node accesses the network, and each node corresponds to a unique identification number.
Continuing with the above example, if the sending node of the synchronous superframe is a non-management node, the system frame number corresponding to the node may be determined according to the identification number of the node. When each node joins the ad hoc network, a corresponding identification number can be allocated to the node, so that the time for sending a synchronous superframe in a synchronous period is set for the node, and communication among the nodes in the ad hoc network is realized according to the identification number.
Optionally, when each node joins the ad hoc network, the corresponding identification number may be allocated to the node according to the neighboring node of the node, so as to implement distributed forwarding of the synchronous superframe in the ad hoc network.
Optionally, the identification number of each node in the ad hoc network is part or all bits of a temporary address of each node in the ad hoc network, and part or all bits of a hardware address of each node.
The current in-Network node takes part or all bits (bit) of an in-Network temporary address (RNTI) or part or all bits of a Hardware address (Hardware ID) allocated by a management node as an identification number of the node.
Further, the method for determining the system frame number corresponding to each node in the ad hoc network according to the identification number of the node may be a remainder operation performed on part or all bits of a temporary address (RNTI) of the node or part or all bits of a Hardware address (Hardware ID) and the number T of system frames in a synchronization period, where the formula is as follows:
SFN × (RNTI or Hardware ID)% (T/N);
the SFN is a system frame number corresponding to the node, N is the number of system frames occupied by the synchronous superframe, T is the number of system frames in a synchronous period, T and N are in a multiple relation, the RNTI is used for representing two conditions of partial or all bits of an in-network temporary address of the node, and the Hardware ID is used for representing two conditions of partial or all bits of a Hardware address of the node.
Optionally, if there are part or all bits of the in-network temporary addresses of two sending nodes or part or all bits of the hardware address and the system frame number obtained after the redundancy operation is performed on the synchronization period are the same, sending the synchronization superframe in the same system frame, because the two nodes have already realized the time-frequency domain synchronization and the sent information of the ad hoc network is the same, even if the two nodes send the synchronization superframe together at the same time, the two nodes will not interfere with each other in their overlapping coverage areas, only the multipath effect will be formed, and the channel estimation and equalization by the receiving node can be eliminated.
In the above embodiment, different system frame number correspondences may be specified for different functions of the management node and the non-management node in the ad hoc network. In addition, for the non-management nodes in the ad hoc network, according to the distribution forwarding synchronization mode in the ad hoc network, when the non-management nodes enter the network, temporary addresses or hardware addresses are allocated to the non-management nodes, and the system frame numbers of the non-management nodes sending the synchronous superframes are automatically associated according to the temporary addresses or the hardware addresses of the nodes.
In one embodiment, the synchronization preamble frame includes a part of a current system frame number of the network, and the system message frame includes the remaining or all of the current system frame number of the network.
The current system frame number of the network is the system frame number corresponding to the current time in the ad hoc network in a system period. Because each sending node sends the system message frame at the system frame number corresponding to the sending node, the current system frame number of the network in the system message frame sent by the sending node is the system frame number corresponding to the sending node.
The synchronization leading frame can indicate the bit of the current system frame number part of the network and indicate the other part in the system message frame besides indicating the synchronization information of the time frequency domain of the two communication parties.
In addition, the system message frame may also indicate all bits of the network's current system frame number.
In a specific example, the synchronization preamble frame may carry: time-frequency domain synchronization indication information of a system message frame; partial bits of a current System Frame Number (SFN) of the network; the number of repetitions of the system message frame.
The system message frame may carry: the rest bits or the complete system frame number except the bits indicated by the synchronous message frame in the current system frame number of the network; the address of the ad hoc network management node (i.e., the PAN coordinator in the previous example); the sending period of the synchronous superframe of a single node takes a system frame as a unit; information of other ad hoc networks.
For example, in a specific example of a system message frame, the data carried includes:
the address of the PAN coordinator (abbreviated PAN ADDR) in the ad hoc network may be represented by the lower 16-bit MAC address of the management node.
A synchronization period: it can be represented by 2 bits, for example, "00" indicates that one synchronization period contains 128 systematic frames, "01" indicates that one synchronization period contains 256 systematic frames, "10" indicates that one synchronization period contains 512 systematic frames, and "11" indicates that one synchronization period contains 1024 systematic frames.
Sequence number of the current system frame of the network: represented by 7 bits. The current system frame number of the network is formed by the secondary synchronization signal frame and the last three bits of the sending node address
Network status of the current ad hoc network: represented by 4 bits. For example, "0000" represents the layer 1 networking phase, "0001" represents the layer 2 networking phase … … "0111" represents the layer 8 networking phase, "1111" networking is complete, each node works normally, and so on.
In one embodiment, the synchronization signal frames include a primary synchronization signal frame and a secondary synchronization signal frame; the main synchronization signal frame is used for realizing the initial synchronization of both communication parties; and the auxiliary synchronization signal frame is used for realizing the accurate synchronization of both communication parties.
The Synchronization preamble frame may include two parts, a Primary Synchronization Signal frame (PSS) and a Secondary Synchronization Signal frame (SSS).
The primary synchronization information can be carried in the primary synchronization signal frame, and the receiving node can realize primary synchronization with the transmitting node according to the primary synchronization information. The initial synchronization may be time alignment and frequency domain synchronization between the receiving node and the transmitting node.
The auxiliary synchronization signal frame can carry accurate synchronization information, and the receiving node can realize accurate synchronization with the sending node according to the auxiliary synchronization signal frame.
In this embodiment, the synchronization preamble frame may further include a primary synchronization signal frame and an auxiliary synchronization signal frame, which carry different synchronization information, and respectively implement initial synchronization and precise synchronization of both communication parties.
Referring to fig. 3, fig. 3 provides a schematic diagram of synchronous superframes of nodes in an ad hoc network. The synchronization superframe of each node (taking node 1 as an example) may include a primary synchronization signal frame PSS (denoted by 301 in the figure), a secondary synchronization signal frame SSS (denoted by 302 in the figure), and a system message frame PBCH (denoted by 303 in the figure), and each node sequentially transmits the synchronization superframe in each synchronization period.
The embodiment of the present application further provides another network wide synchronization method for an ad hoc network, please refer to fig. 4, where the method includes the following steps S401 and S402:
step S401, receiving a synchronous leading frame sent by a sending node, and realizing time-frequency domain synchronization with the sending node according to the synchronous leading frame, wherein the synchronous leading frame comprises indication information of a system message frame;
step S402, receiving the system message frame sent by the sending node according to the indication information, and realizing network frame synchronization according to the system message frame.
When all nodes in the ad hoc network realize network frame synchronization, the ad hoc network realizes the whole network synchronization.
Optionally, the receiving node detects the synchronization preamble frame, and after completing time-frequency domain synchronization according to the synchronization preamble frame, decodes information carried in the system message frame to obtain information used for implementing network frame synchronization, such as a synchronization period, time information of the ad hoc network system, and the like.
In one embodiment, the system message frame includes a network current system frame number, and the implementing network frame synchronization according to the system message frame includes: acquiring the current system frame number of the network from the system message frame; and realizing network frame synchronization according to the acquired system frame number.
The above-mentioned whole network synchronization method of the ad hoc network may be executed on the receiving node side in the peer-to-peer communication, which may specifically refer to the relevant descriptions of the receiving node in fig. 1 to fig. 3 in the ad hoc network, and is not described herein again.
Any node inside or outside the mesh self-networking can realize the frame synchronization with the mesh self-networking as long as the node can synchronously solve the synchronous superframe of any frame by continuously scanning the synchronous channel, and obtain the current system frame number and network information. If there are two nodes' intra-Network temporary addresses rnti (radio Network temporary identity) or Hardware addresses Hardware ID that are the same as the system frame number obtained after the operation of taking the balance of the synchronization period T, the synchronous superframe is transmitted in the same system frame, because the time-frequency domain synchronization is already realized and the transmitted contents are the same, even if two nodes transmit the synchronous superframe together at the same time, the two nodes do not interfere with each other in their overlapping coverage areas, only the multipath effect is formed, and the elimination can be realized through the channel estimation and equalization of the receiving end.
In an application scenario of an ad hoc network, the method for synchronizing the whole ad hoc network can be executed by a sending node and a receiving node respectively, and the method comprises the following specific steps:
receiving node of synchronous superframe:
step one, a receiving node detects the address of a sending node in a primary synchronization signal frame (PSS), and when an effective address is detected, the step two is carried out after the initial time-frequency domain synchronization is completed;
step two, the receiving node detects an auxiliary synchronization signal frame (SSS) to complete fine synchronization; and acquiring the frame length and the repetition times of the system message frame, and acquiring partial bits in the current system frame number of the network to the third step.
And step three, receiving the system message frame, demodulating and decoding the system message frame, obtaining the complete system frame number formed by the other part of bits of the current system frame number of the network, completing the network frame synchronization, and obtaining the network parameters such as the system frame number period and the like.
Transmitting node of synchronous superframe:
step one, the node in the Network completing frame synchronization obtains the system frame number of the node according to the Temporary address RNTI (radio Network Temporary identity) in the Network: SFN is N × RNTI% (T/N), where N is the total number of frames of the synchronization superframe and T is the synchronization period.
And step two, detecting whether other data receiving and sending tasks exist at the sending time, if so, preferentially receiving and sending the data, waiting for a synchronization period to the next sending time, and repeating the step two, and if not, repeating the step three.
And step three, forming a synchronous superframe according to the current system frame number of the network, and sending the synchronous superframe at the sending time.
In the application scenario of the whole network synchronization of the ad hoc network, the whole network frame boundary synchronization of the ad hoc network can be realized on the premise of saving power consumption and avoiding intra-network interference, and based on frame synchronization, the whole network uses a uniform system frame number to perform point-to-point single-hop or multi-hop communication. Under the synchronous system, the nodes can carry out periodic field intensity measurement on the adjacent nodes, adjacent region adjustment, routing planning, open-loop power control emission and the like can be realized during communication with the adjacent regions based on the measurement, the success rate of point-to-point communication is improved, and interference in the network is reduced.
The embodiment of the present application further provides a full network synchronization apparatus of an ad hoc network, please refer to fig. 5, where fig. 5 provides a schematic structural diagram of a peer-to-peer physical layer communication apparatus in an ad hoc network. The apparatus may include:
a synchronous leading frame sending module 501, configured to send a synchronous leading frame to surrounding neighboring nodes, where the synchronous leading frame is used to implement time-frequency domain synchronization with the sending node, and the synchronous leading frame includes indication information of a system message frame.
A system message frame sending module 502, configured to send the system message frame to the neighboring nodes according to the indication information, so that each neighboring node realizes frame synchronization with a sending node according to the system message frame, where the sending node is a node that sends the synchronization preamble frame.
When all nodes in the ad hoc network realize frame synchronization with respective adjacent nodes, the ad hoc network realizes the whole network synchronization.
The network-wide synchronization apparatus of the ad hoc network in fig. 5 may be implemented on the transmitting node side. For more contents of the working principle and working mode of the ad hoc network synchronization apparatus, reference may be made to the description in fig. 1 to fig. 3, which is not described herein again.
The embodiment of the present application further provides another whole network synchronization apparatus of an ad hoc network, please refer to fig. 6, and fig. 6 provides a schematic structural diagram of another whole network synchronization apparatus of an ad hoc network. The apparatus may include:
a synchronous leading frame receiving module 601, configured to receive a synchronous leading frame sent by a sending node, and implement time-frequency domain synchronization with the sending node according to the synchronous leading frame, where the synchronous leading frame includes indication information of a system message frame;
a system message frame receiving module 602, configured to receive a system message frame sent by the sending node according to the indication information, and implement network frame synchronization according to the system message frame;
when all nodes in the ad hoc network realize network frame synchronization, the ad hoc network realizes the whole network synchronization.
The network-wide synchronization apparatus of the ad hoc network in fig. 6 may be implemented on the receiving node side. For more contents of the working principle and working mode of the ad hoc network synchronization apparatus, reference may be made to the description in fig. 4, which is not described herein again.
The embodiment of the present application further provides a terminal, which includes a memory and a processor, where the memory stores computer instructions executable on the processor. The processor, when executing the computer instructions, may perform the steps of the network wide synchronization method of the ad hoc networks in fig. 1 to 3 or fig. 4. The computing device can be a smart phone or other intelligent devices such as a smart meter.
The embodiment of the present application further provides a storage medium, on which computer instructions are stored, and when the computer instructions are executed, the steps of the network wide synchronization method of the ad hoc network in fig. 1 to 3 or fig. 4 are executed.
In this embodiment of the present application, the Core Network may be an evolved packet Core (EPC for short), a 5G Core Network (5G Core Network), or may be a novel Core Network in a future communication system. The 5G Core Network is composed of a set of devices, and implements Access and Mobility Management functions (AMF) for Mobility Management and other functions, a User Plane Function (UPF) for providing packet routing forwarding and Quality of Service (QoS) Management and other functions, and a Session Management Function (SMF) for providing Session Management, IP address allocation and Management and other functions.
A Base Station (BS) in the embodiment of the present application, which may also be referred to as a base station device, is a device deployed in a Radio Access Network (RAN) to provide a wireless communication function. For example, a device providing a base station function in a 2G network includes a Base Transceiver Station (BTS), a device providing a base station function in a 3G network includes a node b (nodeb), apparatuses for providing a base station function in a 4G network include evolved node bs (enbs), which, in a Wireless Local Area Network (WLAN), the devices providing the base station function are an Access Point (AP), a device gNB providing the base station function in a New Radio (NR) of 5G, and a node B (ng-eNB) continuing to evolve, the gNB and the terminal communicate with each other by adopting an NR (NR) technology, the ng-eNB and the terminal communicate with each other by adopting an E-UTRA (evolved Universal Terrestrial Radio Access) technology, and both the gNB and the ng-eNB can be connected to a 5G core network. The base station in the embodiment of the present application also includes a device and the like that provide a function of the base station in a future new communication system.
The network on the network side in the embodiment of the present application refers to a communication network providing communication services for a terminal, and includes a base station of a radio access network, a base station controller of the radio access network, and a device on the core network side.
Definitions or descriptions of commonly used words:
a terminal in this embodiment may refer to various forms of User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station (mobile station, MS), a remote station, a remote terminal, a mobile device, a user terminal, a terminal device (terminal equipment), a wireless communication device, a user agent, or a user equipment. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with a Wireless communication function, a computing device or other processing devices connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G Network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which is not limited in this embodiment.
In the embodiments of the present application, a unidirectional communication link from an access network to a terminal is defined as a downlink, data transmitted on the downlink is downlink data, and a transmission direction of the downlink data is referred to as a downlink direction; the unidirectional communication link from the terminal to the access network is an uplink, the data transmitted on the uplink is uplink data, and the transmission direction of the uplink data is referred to as an uplink direction.
It should be understood that the term "and or" is used herein to describe an association that describes an associated object, meaning that there may be three relationships, for example, a and or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "or" herein indicates that the former and latter related objects are in an "or" relationship.
"plurality" appearing in the embodiments of the present application means two or more.
The descriptions of the first, second, etc. appearing in the embodiments of the present application are for illustrative purposes and for distinguishing the objects of description, and do not indicate any particular limitation on the number of devices in the embodiments of the present application, and do not constitute any limitation on the embodiments of the present application.
"connect" in the embodiments of the present application refers to various connection manners, such as direct connection or indirect connection, to implement communication between devices, which is not limited in this embodiment of the present application.
It should be understood that, in the embodiment of the present application, the processor may be a Central Processing Unit (CPU), and the processor may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
It will also be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example and not limitation, many forms of Random Access Memory (RAM) are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (enhanced SDRAM), SDRAM (SLDRAM), synchlink DRAM (SLDRAM), and direct bus RAM (DR RAM).
The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. The procedures or functions according to the embodiments of the present application are wholly or partially generated when the computer instructions or the computer program are loaded or executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire or wirelessly. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more collections of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.
It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
In the several embodiments provided in the present application, it should be understood that the disclosed method, apparatus and system may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative; for example, the division of the unit is only a logic function division, and there may be another division manner in actual implementation; for example, various elements or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a terminal (which may be a personal computer, a server, or a network device) to perform some steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
Although the present application is disclosed above, the present application is not limited thereto. Various changes and modifications can be easily made by those skilled in the art without departing from the spirit and scope of the present application, and it is intended to cover various combinations of functions, implementation steps, software and hardware, which are described above, and embodiments of the present application.
Claims (13)
1. A method for synchronizing the whole ad hoc network is characterized by comprising the following steps:
sending a synchronous leading frame to surrounding adjacent nodes, wherein the synchronous leading frame is used for realizing the time-frequency domain synchronization of both communication parties, and the synchronous leading frame comprises the indication information of a system message frame;
sending the system message frame to surrounding adjacent nodes according to the indication information so as to enable the surrounding adjacent nodes to realize network frame synchronization according to the system message frame;
when each node in the ad hoc network realizes network frame synchronization, the ad hoc network realizes the whole network synchronization;
the sending time of the synchronous superframe of each node in the ad hoc network is periodic, each period is divided into a plurality of time periods, the divided time periods are numbered according to the time sequence to obtain a system frame number, and each node in the ad hoc network has a corresponding relation with the system frame number;
and the synchronous leading frame and the system message frame are contained in the same synchronous superframe, and each node in the ad hoc network sends a synchronous superframe at the system frame number corresponding to the node.
2. The method according to claim 1, wherein when the sending node is a management node of the ad hoc network, the system frame number corresponding to the sending node is zero.
3. The method according to claim 2, wherein when the sending node is a non-management node, the system frame number corresponding to the sending node is obtained according to the identification number of the sending node in the ad hoc network;
the identification number of each node is a mark number distributed by the management node when the node accesses the network, and each node corresponds to a unique identification number.
4. The method according to claim 3, wherein the identification number of each node in the ad hoc network is part or all bits of a temporary address of each node in the ad hoc network, and part or all bits of a hardware address of each node.
5. The method of claim 1, wherein the synchronization preamble frame comprises a partial network current system frame number, and wherein the system message frame comprises the remaining or all of the network current system frame numbers.
6. The method of claim 1, wherein the synchronization preamble frame and the system message frame are transmitted in a synchronization channel.
7. The method of claim 1, wherein the synchronization signal frames comprise primary synchronization signal frames and secondary synchronization signal frames; the main synchronization signal frame is used for realizing the initial synchronization of both communication parties;
and the auxiliary synchronization signal frame is used for realizing the accurate synchronization of both communication parties.
8. A method for synchronizing the whole ad hoc network is characterized by comprising the following steps:
receiving a synchronous leading frame sent by a sending node, and realizing time-frequency domain synchronization with the sending node according to the synchronous leading frame, wherein the synchronous leading frame comprises indication information of a system message frame;
receiving a system message frame sent by the sending node according to the indication information, and realizing network frame synchronization according to the system message frame;
when all nodes in the ad hoc network realize network frame synchronization, the ad hoc network realizes the whole network synchronization;
the sending time of the synchronous superframe of each node in the ad hoc network is periodic, each period is divided into a plurality of time periods, the divided time periods are numbered according to the time sequence to obtain a system frame number, and each node in the ad hoc network has a corresponding relation with the system frame number;
and the synchronous leading frame and the system message frame are contained in the same synchronous superframe, and each node in the ad hoc network sends a synchronous superframe at the system frame number corresponding to the node.
9. The method of claim 8, wherein the system message frame includes a network current system frame number, and wherein achieving frame synchronization with a transmitting node based on the system message frame comprises:
acquiring the current system frame number of the network from the system message frame;
and realizing network frame synchronization according to the current system frame number of the network.
10. A full network synchronization apparatus of an ad hoc network, the apparatus comprising:
a synchronous leading frame sending module, configured to send a synchronous leading frame to surrounding neighboring nodes, where the synchronous leading frame is used to implement time-frequency domain synchronization between two communication parties, and the synchronous leading frame includes indication information of a system message frame;
a system message frame sending module, configured to send the system message frame to neighboring nodes according to the indication information, so that the neighboring nodes realize network frame synchronization according to the system message frame;
when each node in the ad hoc network realizes network frame synchronization, the ad hoc network realizes the whole network synchronization;
the sending time of the synchronous superframe of each node in the ad hoc network is periodic, each period is divided into a plurality of time periods, the divided time periods are numbered according to the time sequence to obtain a system frame number, and each node in the ad hoc network has a corresponding relation with the system frame number;
and the synchronous leading frame and the system message frame are contained in the same synchronous superframe, and each node in the ad hoc network sends a synchronous superframe at the system frame number corresponding to the node.
11. A full network synchronization apparatus of an ad hoc network, the apparatus comprising:
a synchronous leading frame receiving module, configured to receive a synchronous leading frame sent by a sending node, and implement time-frequency domain synchronization with the sending node according to the synchronous leading frame, where the synchronous leading frame includes indication information of a system message frame;
a system message frame receiving module, configured to receive a system message frame sent by the sending node according to the indication information, and implement network frame synchronization according to the system message frame;
when all nodes in the ad hoc network realize network frame synchronization, the ad hoc network realizes the whole network synchronization;
the sending time of the synchronous superframe of each node in the ad hoc network is periodic, each period is divided into a plurality of time periods, the divided time periods are numbered according to the time sequence to obtain a system frame number, and each node in the ad hoc network has a corresponding relation with the system frame number;
and the synchronous leading frame and the system message frame are contained in the same synchronous superframe, and each node in the ad hoc network sends a synchronous superframe at the system frame number corresponding to the node.
12. A terminal comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the method of any one of claims 1 to 7, or of claim 8 or 9.
13. A storage medium having stored thereon computer instructions operable to perform the steps of the method of any one of claims 1 to 7, or 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911417691.4A CN111132304B (en) | 2019-12-31 | 2019-12-31 | Whole network synchronization method and device of ad hoc network, terminal and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911417691.4A CN111132304B (en) | 2019-12-31 | 2019-12-31 | Whole network synchronization method and device of ad hoc network, terminal and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111132304A CN111132304A (en) | 2020-05-08 |
| CN111132304B true CN111132304B (en) | 2022-01-28 |
Family
ID=70506831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911417691.4A Active CN111132304B (en) | 2019-12-31 | 2019-12-31 | Whole network synchronization method and device of ad hoc network, terminal and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111132304B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111935725B (en) * | 2020-07-10 | 2023-01-31 | 展讯半导体(成都)有限公司 | Communication time sequence planning method, device, related equipment, storage medium and system |
| CN113194529B (en) * | 2021-06-30 | 2021-10-01 | 广州慧睿思通科技股份有限公司 | Clock alignment method and device for intercom device and storage medium |
| CN113395753B (en) * | 2021-08-17 | 2021-12-14 | 汉朔科技股份有限公司 | Method and system for synchronizing wireless terminal and base station and wireless terminal |
| CN114189887B (en) * | 2021-11-23 | 2023-08-08 | 西安电子科技大学 | Method for optimizing mobile ad hoc network route based on improved sparrow search algorithm |
| CN117156588B (en) * | 2023-09-12 | 2024-04-02 | 宸芯科技股份有限公司 | Resource allocation method, device, electronic equipment and computer readable storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101150564A (en) * | 2006-09-19 | 2008-03-26 | 华为技术有限公司 | Method for dividing frame structure, its realization system and a domain scheduling method |
| CN101292461A (en) * | 2005-08-23 | 2008-10-22 | 诺基亚公司 | Apparatus, method and computer program product providing initial cell acquisition and pilot sequence detection |
| CN102550096A (en) * | 2009-07-03 | 2012-07-04 | 岩星比德科有限公司 | The use of first and second preambles in wireless communication signals |
| CN103493525A (en) * | 2011-03-25 | 2014-01-01 | 北京新岸线移动多媒体技术有限公司 | Wireless communication system, network device, and terminal device |
| CN105099542A (en) * | 2014-05-12 | 2015-11-25 | 魏峥 | MANET (Mobile Ad Hoc Network) frame generating method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2050227B1 (en) * | 2006-07-28 | 2019-06-26 | BlackBerry Limited | System and method for wireless multi-hop network synchronization and monitoring |
| CN101904125B (en) * | 2007-11-09 | 2015-02-04 | 中兴通讯美国公司 | Flexible OFDM/OFDMA frame structure for communication systems |
| US10257325B2 (en) * | 2015-02-05 | 2019-04-09 | Samsung Electronics Co., Ltd. | System, apparatus, and method for configuring preamble and synchronizing frame |
| EP3473048B1 (en) * | 2016-06-15 | 2024-03-27 | InterDigital Patent Holdings, Inc. | Random access procedures in next generation networks |
-
2019
- 2019-12-31 CN CN201911417691.4A patent/CN111132304B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101292461A (en) * | 2005-08-23 | 2008-10-22 | 诺基亚公司 | Apparatus, method and computer program product providing initial cell acquisition and pilot sequence detection |
| CN101150564A (en) * | 2006-09-19 | 2008-03-26 | 华为技术有限公司 | Method for dividing frame structure, its realization system and a domain scheduling method |
| CN102550096A (en) * | 2009-07-03 | 2012-07-04 | 岩星比德科有限公司 | The use of first and second preambles in wireless communication signals |
| CN103493525A (en) * | 2011-03-25 | 2014-01-01 | 北京新岸线移动多媒体技术有限公司 | Wireless communication system, network device, and terminal device |
| CN105099542A (en) * | 2014-05-12 | 2015-11-25 | 魏峥 | MANET (Mobile Ad Hoc Network) frame generating method |
Non-Patent Citations (3)
| Title |
|---|
| mOTOROLA."R1-00-1399".《3GPP》.2000, * |
| 自组织网络中前导信号设计及检测算法研究;张想等;《电视技术》;20170317(第03期);全文 * |
| 认知无线电自组织网络MAC协议;罗涛等;《计算机学报》;20130715(第07期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111132304A (en) | 2020-05-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111132304B (en) | Whole network synchronization method and device of ad hoc network, terminal and storage medium | |
| US9521536B2 (en) | Device discovery of second user equipments in a second network for D2D communication | |
| CN111107617B (en) | Data sending and receiving method, device, terminal and storage medium in ad hoc network | |
| EP3058783B1 (en) | Systems and methods for establishing synchronization across multiple networks and participating stations via operations on a known common channel | |
| JP6275252B2 (en) | D2D signal transmission method and apparatus | |
| US9843989B2 (en) | Uniform UE initialization procedure for both in-coverage and out-of-coverage D2D communications | |
| US20150063327A1 (en) | High efficiency wireless (hew) access point (ap) coordination protocol | |
| CN109041039A (en) | The user equipment and its method that equipment is communicated for equipment | |
| WO2020019905A1 (en) | Method for controlling transmission of beacon frame, and related apparatus | |
| US9854456B2 (en) | Method and apparatus for managing multi-hop relay networks | |
| JP6451969B2 (en) | Communications system | |
| US10178658B2 (en) | Base station, user equipment and associated methods | |
| CN105453676A (en) | System and method for resource allocation for open discovery in device-to-device communications | |
| CN106233791A (en) | The definition of different NDP PS polling types | |
| EP3403447B1 (en) | Regulating responses based on request addressing or request channels | |
| EP4021108A1 (en) | Resource sharing method and apparatus | |
| WO2020011000A1 (en) | Multi-access point (ap) collaborative transmission method, related apparatus, and system | |
| CN105684339A (en) | Enhanced subchannel selective transmission procedure | |
| JP6697095B2 (en) | Communication method and communication device | |
| JP6400024B2 (en) | Method and apparatus for obtaining information associated with beacon transmission in a wireless communication system | |
| EP3142438A1 (en) | Method for inter-device communications, base station, and user equipment | |
| US10193985B2 (en) | Method and device for performing service discovery in wireless communication system | |
| US10524160B2 (en) | Balancing load across radio frequency channels | |
| CN110996345B (en) | Method and device for detecting or reporting field intensity in ad hoc network, computing equipment and storage medium | |
| CN107646170A (en) | The communication channel jump of anchor auxiliary |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |