CN111343725A - Signal transmission method and device and wireless transceiver chip - Google Patents
Signal transmission method and device and wireless transceiver chip Download PDFInfo
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- CN111343725A CN111343725A CN201811558014.XA CN201811558014A CN111343725A CN 111343725 A CN111343725 A CN 111343725A CN 201811558014 A CN201811558014 A CN 201811558014A CN 111343725 A CN111343725 A CN 111343725A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W72/12—Wireless traffic scheduling
- H04W72/1215—Wireless traffic scheduling for collaboration of different radio technologies
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Abstract
The embodiment of the invention provides a signal transmission method, a signal transmission device and a wireless transceiving chip, wherein the method comprises the following steps: storing the lead code carrying the identification information of the first wireless network; when the lead code of the message is received, whether the identification information of the wireless network carried in the lead code of the message is the same as the identification information of the first wireless network is judged, and the transmission process of the message is scheduled according to the judgment result.
Description
Technical Field
The present invention relates to, but not limited to, signal transmission technology for wireless local area networks, and in particular, to a signal transmission method, a signal transmission apparatus, and a wireless transceiver chip.
Background
At any time, the intelligent home scheme is mature and the application is popularized, products using 2.4G frequency band communication coexist more and more, and because the products work in the 2.4G frequency band, the same frequency and adjacent frequency mutually cause interference, and the interference is more prominent when the products respectively increase the transmission power and pursue longer distance, stronger penetration and wider coverage.
In the related art, for different networks working in a 2.4G frequency band, the provided coexistence scheme has little effect in a complex networking environment; the coexistence scheme of the ZigBee network and the wireless fidelity (WiFi) network is described as an example.
Considering that a ZigBee network is in absolute disadvantage in power, data volume and speed relative to a WiFi network, and the channel preemption capability is inferior to that of the WiFi network, a scheme that a transmitting and receiving device of the ZigBee network can normally work under the condition of interference of the WiFi network is provided in the related technology; the coexistence scheme of the currently common ZigBee network and the WiFi network mainly includes the following two schemes:
scheme 1: after detecting a working channel of the WiFi network, actively configuring an automatic channel-skipping scheme for skipping a channel by a transceiver; when a transmitting and receiving device of the ZigBee network needs to transmit and receive a Packet, the transmitting and receiving device can coordinate the pause of the WiFi network through a Packet Transmission Arbitration (PTA) mechanism, and the PTA mechanism can determine who preferentially uses a current channel to transmit and receive data according to a certain logic by an arbitration code when channel use conflicts occur; the scheme has little effect in the complex environment of the WiFi network, for example, when three channels of WiFi 12/17/22 work, the transceiver of the ZigBee network has difficulty in acquiring the use right of the channels.
Scheme 2: due to the requirement of time delay, when receiving the lead code, the transceiver of the ZigBee network needs to transmit a request by using a PTA mechanism to enable the WiFi network to pause, but the received message cannot be judged to be the message of the network by a Media Access Control (MAC) layer, and then the request is transmitted by using the PTA mechanism; this is because, when a high-speed WiFi network is used, it is difficult for the transceiver of the ZigBee network to receive a complete message, and it is difficult to perform logical judgment on the MAC layer.
For the scheme 2, under the current standard specification, the preamble is fixed, that is, the transceiver of the ZigBee network will receive all the acquired preambles and messages supporting the IEEE802.15.4 standard, and at this time, if the preamble is received, a channel is requested to be used from the WiFi network, because the network environment of the load (for example, there are two ZigBee networks and each network node number 50) receives many preambles in non-native networks, and further, a large number of requests are generated by arbitration to suspend the WiFi network, and these requests will be found in the subsequent load content analysis of the MAC layer to be non-native network messages and are meaningless, so that the bandwidth of the WiFi network is reduced and a large number of invalid operations of ZigBee network master Micro Control Units (MCUs) are interrupted.
Disclosure of Invention
The embodiment of the invention provides a signal transmission method, a signal transmission device and a wireless transceiver chip, which can solve the problem that a network coexistence scheme has little effect in a complex networking environment.
In order to achieve the above purpose, the technical solution of the embodiment of the present invention is realized as follows:
the embodiment of the invention provides a signal transmission method, which is applied to a transceiver of a first wireless network and comprises the following steps:
storing the lead code carrying the identification information of the first wireless network;
when the lead code of the message is received, whether the identification information of the wireless network carried in the lead code of the message is the same as the identification information of the first wireless network is judged, and the transmission process of the message is scheduled according to the judgment result.
The embodiment of the invention also provides a signal transmission device, which is applied to a transceiver of a first wireless network and comprises a processor and at least one memory; wherein the content of the first and second substances,
the at least one memory is used for storing the lead code carrying the identification information of the first wireless network;
the processor is configured to determine whether the identification information of the wireless network carried in the preamble of the message is the same as the identification information of the first wireless network when the preamble of the message is received, and schedule a transmission process of the message according to a determination result.
The embodiment of the invention also provides a wireless transceiver chip which comprises any one of the signal transmission devices.
The embodiment of the invention provides a signal transmission method, a signal transmission device and a wireless transceiver chip, wherein a lead code carrying identification information of a first wireless network is stored; when the lead code of the message is received, whether the identification information of the wireless network carried in the lead code of the message is the same as the identification information of the first wireless network is judged, and the transmission process of the message is scheduled according to the judgment result. Therefore, the technical scheme of the embodiment of the invention can schedule the transmission process of the message according to the identification information of the network, so that the network can reasonably acquire the channel use right and is suitable for the environment of complex networking; in addition, the transmission process of the message can be scheduled according to the identification information of the network at the preamble receiving stage of the message, so that invalid suspension of data transmission of other networks (such as a WiFi network) can be avoided, occupation of a controller of the network is reduced, network coexistence efficiency is improved, and the bandwidth of other networks is ensured not to be reduced meaninglessly.
Drawings
Fig. 1 is a flowchart of a signal transmission method according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a networking architecture of a wireless network according to an embodiment of the present invention;
fig. 3 is a schematic diagram of another networking architecture of a wireless network according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a signal transmission device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the invention can carry out transmission scheduling on different wireless local area networks in the same frequency band; for example, when the first wireless network and the second wireless network are different wireless local area networks in the same frequency band, the packet transmission process of the first wireless network and the second wireless network may be scheduled based on the technical solution of the embodiment of the present invention.
Here, each wireless network (the first wireless network or the second wireless network) may be provided with a transceiving means, and the transceiving means of each wireless network may include a wireless signal receiving means and/or a wireless signal transmitting means. In practical applications, the transceiver of each wireless network may be implemented by using a wireless transceiver chip.
As one implementation, the first wireless network and the second wireless network are both wireless local area networks supporting Institute of Electrical and Electronics Engineers (IEEE) 802.15.4 standards; further, the first wireless network or the second wireless network may be one of: a ZigBee network, a Bluetooth network, a household Internet of things communication protocol (Thread) network and a WiFi network; the ZigBee network, the Bluetooth network, the Thread network and the WiFi network all support communication in a 2.4G frequency band; in a specific example, the first wireless network is a ZigBee network and the second wireless network is a WiFi network.
When the first wireless network and the second wireless network are both wireless local area networks supporting the IEEE802.15.4 standard, the transceiver of the first wireless network or the second wireless network can be implemented by an IEEE802.15.4 wireless transceiver chip.
In the embodiment of the present invention, the networking structure of each wireless network may include a coordinator and at least one node or sensor, where the coordinator is a central device of the wireless network, the node or sensor is another device in the wireless network except the coordinator, and the coordinator may communicate with the node or sensor; illustratively, a node or sensor may be a device purchased or used by a user.
The coordinator or the node can receive the external instruction and work according to the external instruction; for example, the user may send an instruction to the coordinator through a mobile phone Application (APP), a web page, or a function button on the device; the user may also send instructions to the node via an entity button on the node.
In the embodiment of the present invention, the transceiver of each wireless network may be located in a coordinator or a node.
Based on the above description, the following examples are proposed.
First embodiment
The embodiment of the invention provides a signal transmission method which can be applied to a transceiver of a first wireless network.
Fig. 1 is a flowchart of a signal transmission method according to an embodiment of the present invention, and as shown in fig. 1, the flowchart may include:
step 101: storing the lead code carrying the identification information of the first wireless network;
here, the identification information of the first wireless network is an identification that the first wireless network is distinguished from other co-frequency wireless networks, and the identification information of the first wireless network may be data specific to the first wireless network, for example, when the first wireless network is a wireless local area network supporting IEEE802.15.4 standard, the identification information of the first wireless network includes at least one of the following: a Network Identifier (PANID) of the first wireless Network, a 64-bit extended unique identifier (EUI-64) of a coordinator of the first wireless Network, a part of the EUI-64 of the coordinator of the first wireless Network.
In practical applications, the preamble carrying the identification information of the first wireless network may be stored in a memory, where the memory may be a register or a Flash memory.
In a specific example, a configurable preamble device for storing the preamble can be added to the IEEE802.15.4 wireless transceiver chip, where the preamble device can be implemented by the above-mentioned register or Flash memory.
As an implementation manner, the standard lead code can be modified to obtain the lead code carrying the identification information of the first wireless network; in the embodiment of the present invention, the standard preamble is a preamble conforming to a wireless communication protocol standard, for example, the standard preamble is a preamble conforming to an IEEE802.15.4 standard.
For the implementation of modifying the standard preamble, for example, the identification information of the first wireless network may be added to the standard preamble to obtain the preamble carrying the identification information of the first wireless network; in practice, the identification information of the first wireless network may be added in reserved bytes of a standard preamble.
In a specific example, when the standard preamble is a preamble conforming to IEEE802.15.4 standard, the preamble carrying the identification information of the first wireless network may be extended to the format defined by the standard preamble, so that after the standard preamble is modified, the standard preamble does not need to be changed greatly, and only the reserved 2 bytes need to be filled with the identification information of the first wireless network, for example, one of the bytes is filled with the PANID of the first wireless network.
After the PANID of the first wireless network is added to the standard preamble (i.e., after the preamble device is configured), the content of an exemplary modified preamble (the preamble carrying the identification information of the first wireless network) is defined as follows:
Format of the Mgmt_Leave_req Command Frame
Bits:16 Bits:16 Bits:8
00 00 Current PANID A7
in the embodiment of the present invention, as to the timing and basis for modifying the standard preamble, illustratively, a modified preamble instruction may be received, where the modified preamble instruction is used to instruct to add the identification information of the first wireless network to the standard preamble; in this way, the standard preamble can be modified in the manner described above in accordance with the modify preamble instruction.
Here, the preamble modification instruction may be an instruction that a user may issue through a mobile phone APP, a web page, or a function button on the device.
In practical applications, when the transceiver of the first wireless network is implemented by the IEEE802.15.4 wireless transceiver chip, the IEEE802.15.4 wireless transceiver chip may receive the preamble modification instruction, and then reconfigure the preamble stored in the preamble device according to the preamble modification instruction, that is, modify the standard preamble, to obtain the preamble carrying the identification information of the first wireless network.
Further, when the IEEE802.15.4 wireless transceiver chip of the coordinator of the first wireless network receives the preamble modification instruction, the preamble modification instruction may be sent to each node or sensor of the first wireless network, and the node or sensor of the first wireless network may modify the preamble according to the received preamble modification instruction; that is, after the coordinator and all the newly added nodes operating in the standard mode receive the preamble modification instruction, the data in the preamble device is modified into the data in the instruction (i.e., the preamble carrying the identification information of the first wireless network), and the subsequent coordinator and each node transmit and receive the message all use the new preamble.
It should be noted that there may be one or more configurable preamble apparatuses. As an implementation manner, in the transceiver of the first wireless network, two configurable preamble apparatuses may be provided, and both of the two preamble apparatuses may be implemented by using a register or a Flash memory. The two preamble devices can be regarded as two memories, which are respectively marked as a first memory and a second memory; wherein the first memory stores data that is configurable and the second memory stores standard preambles.
In the embodiment of the present invention, the data may be stored in the first memory and the second memory by using the method 1 or the method 2.
Mode 1:
for the data stored in the first memory, the data stored in the first memory is always a preamble carrying the identification information of the first wireless network.
The transceiving means of the first wireless network may receive a preamble usage indication indicating: the lead code needed to be used when the message is received is the lead code stored in the first memory or the lead code stored in the second memory; in the transceiver of the first wireless network, the preamble usage indication may be stored in the form of a flag or a variable, and the preamble usage indication may be a standard preamble usage indication or a non-standard preamble usage indication.
For example, when the preamble usage indication is a standard preamble usage indication, the transceiver of the first wireless network needs to use the standard preamble stored in the second memory when receiving the packet; when the preamble use indication is a non-standard preamble use indication, the transceiver of the first wireless network needs to use the standard preamble stored in the first memory when receiving the packet.
Mode 2:
for the data stored in the first memory, the data stored in the first memory may be configured as follows according to actual conditions: a preamble or set invalid data carrying identification information of the first wireless network; here, the set invalid data may be predetermined specific data, and for example, the set invalid data may be all 00 data, all 0xFF data, all 0xFE data, or the like.
When receiving a message, a transceiver of a first wireless network firstly judges the data content stored in a first memory, and if the data stored in the first memory is invalid data, a standard lead code stored in a second memory is needed when receiving the message; on the contrary, if the data stored in the first memory is the preamble, the preamble stored in the first memory needs to be used when the message is received.
Step 102: receiving a lead code of a message, judging whether the identification information of the wireless network carried in the lead code of the message is the same as the identification information of the first wireless network, and scheduling the transmission process of the message according to the judgment result.
For example, when the transceiver of the first wireless network receives an air interface signal, the transceiver may compare the identification information of the wireless network carried in the air interface signal with the identification information of the first wireless network, and further determine whether the identification information of the wireless network carried in the preamble of the packet is the same as the identification information of the first wireless network; specifically, when the transceiver of a wireless network receives the preamble of the message, an exclusive or operation may be performed on the identification information of the wireless network and the identification information of the first wireless network, which are carried in the preamble of the message, so as to determine whether the identification information of the wireless network and the identification information of the first wireless network, which are carried in the preamble of the message, are the same; thus, when the first wireless network is a wireless local area network supporting the IEEE802.15.4 standard, it can be determined whether the currently received message belongs to the IEEE802.15.4 standard message or not, and also whether the currently received message belongs to the first wireless network message or not,
as for the implementation manner of scheduling the transmission process of the packet according to the determination result, for example, when the identification information of the wireless network carried in the preamble of the packet is different from the identification information of the first wireless network, the packet being received is discarded.
That is to say, when the first wireless network is a wireless local area network supporting IEEE802.15.4 standard, the transceiver of the first wireless network may determine whether the currently received packet belongs to a packet of the local network (the first wireless network) at the receiving and checking stage of the preamble, so that, referring to the manner of discarding non-802.15.4 signals in the standard specification, the packet of the IEEE802.15.4 standard which is not the local network is also discarded, thereby saving the operation resources of the transceiver of the first wireless network, reducing or even completely eliminating the MCU occupation caused by the packet reception which is not the local network, and inefficiently suspending the data transmission of other networks, and further optimizing the wireless local area network supporting IEEE802.15.4 standard, improving the network coexistence efficiency, and having practical significance.
And when the identification information of the wireless network carried in the lead code of the message is the same as the identification information of the first wireless network, requesting to suspend the data transmission of the second wireless network, wherein the first wireless network and the second wireless network are different wireless local area networks with the same frequency band.
In practical application, for the implementation manner of requesting to suspend the data transmission of the second wireless network, in a PTA application scenario, a PTA mechanism may be used to request to suspend the data transmission of the second wireless network; for example, when the second wireless network is a WiFi network, the PTA mechanism may be used to trigger a REQUEST to the WiFi network, so that the WiFi network reduces or suspends the operation to occupy less or even not use the current channel, and the first wireless network occupies more or even exclusively the current channel to correctly receive the packet.
Further, after the data transmission of a second wireless network is requested to be suspended and the message is determined to be received completely, the second wireless network is informed to continue the data transmission; in practical application, in a PTA application scenario, after it is determined that the message reception is completed, a PTA mechanism may be used to notify the WiFi network to continue normal operation.
As an implementation manner, the transceiver of the first wireless network may further receive a resume preamble instruction, where the resume preamble instruction is used to instruct to resume the currently stored preamble to the standard preamble; in this way, the transceiver of the first wireless network can recover the preamble required to be used when receiving the message to the standard preamble according to the preamble recovery instruction.
Here, the preamble recovery instruction may be an instruction sent by a user through a mobile phone APP, a web page, or a function button on the device; in particular, the resume preamble instruction may be used when a user joins a purchased node to an existing wireless network; the user can send a lead code recovery instruction to the coordinator through media such as a mobile phone APP, a webpage and a function button on equipment, so that the coordinator works in a standard mode (namely the coordinator uses the stored standard lead code when receiving the message), and then a standard network access process is used for adding the new node into the network (the new node uses the stored standard lead code when receiving the message).
The preamble recovery instruction can also be an instruction input to the node by a user through an entity button on the node; specifically, when the node needs to resume using the standard preamble, the coordinator need not transmit the preamble resuming instruction, but may automatically resume the preamble to a value defined in the standard according to an instruction input by the user, for example, pressing an entity button for 8 seconds, releasing the button after the node indicator lamp blinks 4 times, which is equivalent to inputting the preamble resuming instruction to the node. The above manner of obtaining the preamble restoration instruction through the entity button can be used when a certain node that has already been added to the unknown network is added to the current network, and further, the node can be directly restored to the factory state, where the factory state includes the factory state setting value of the preamble.
In the embodiment of the present invention, in the transceiver of the first wireless network, if only one memory is used to store the preamble, the transceiver of the first wireless network may directly restore the preamble stored in the memory to the standard preamble when receiving the preamble restoration instruction.
The transceiver of the first wireless network may store the preamble using a plurality of memories, and for example, the first memory and the second memory may be used to store the preamble.
Based on the above-mentioned mode 1, when receiving the standard preamble usage instruction, the transceiver of the first wireless network may use the standard preamble stored in the second memory as a preamble that needs to be used when receiving the packet.
Further, based on the above mode 1, when the transceiver of the first wireless network receives the preamble of the packet and determines that the standard preamble is the preamble that needs to be used when receiving the packet, the transceiver schedules the transmission process of the packet according to the standard preamble.
Based on the above mode 1, when receiving the non-standard preamble use instruction and receiving the preamble of the packet, the transceiver of the first wireless network may schedule the transmission process of the packet according to the determination result, according to whether the identification information of the wireless network carried in the preamble of the packet is the same as the identification information of the first wireless network.
In the above-described mode 2, the transceiver of the first wireless network can change the data stored in the first memory into the set invalid data in accordance with the preamble restoration command, and can use the standard preamble stored in the second memory as the preamble to be used when receiving the message.
Further, based on the above mode 2, when the transceiver of the first wireless network receives the preamble of the packet and determines that the data stored in the first memory is invalid data, the transceiver schedules the transmission process of the packet according to the standard preamble stored in the second memory.
Based on the above mode 2, when determining that the data stored in the first memory is the preamble carrying the identification information of the first wireless network and when receiving the preamble of the packet, the transceiver of the first wireless network may schedule the transmission process of the packet according to the determination result, according to whether the identification information of the wireless network carried in the preamble of the packet is the same as the identification information of the first wireless network.
The embodiment of the invention can be applied to the field of products formed by IEEE802.15.4PHY specifications and protocol chips, in particular to the technical fields of Internet of things such as intelligent homes, intelligent buildings and intelligent energy sources borne on IEEE802.15.4 wireless transceiver chips such as ZigBee, dottotot, Thread and the like, and belongs to the supplement and application of IEEE802.15.4PHY protocol standards.
Second embodiment
In order to further embody the object of the present invention, the first embodiment of the present invention is further illustrated.
In a second embodiment of the present invention, a first wireless network is a wireless local area network supporting IEEE802.15.4 standard, and a transceiver of the first wireless network is disposed in both a coordinator and a node of the first wireless network; the transceiver of the first wireless network is implemented by adopting an IEEE802.15.4 wireless transceiver chip, a lead code device is added in the IEEE802.15.4 wireless transceiver chip and used for storing lead codes, and the lead code device is implemented by adopting a register.
Fig. 2 is a schematic diagram of a networking structure of a wireless network according to an embodiment of the present invention, and as shown in fig. 2, a target sensor 1 and a target sensor n respectively represent two nodes, an 802.15.4 chip is an IEEE802.15.4 wireless transceiver chip for short, and an instruction input end may be implemented based on a mobile phone APP, a web page, or a function button on a device; each target sensor may be a door and window magnet, a smoke sensor, a human body infrared, an intelligent door lock, and the like, which use an 802.15.4 chip, that is, a product operating ZigBee, dottot, Thread, and the like, based on the IEEE802.15.4 protocol.
Several application scenarios are exemplarily explained below based on the networking architecture shown in fig. 2.
The application scene one: adding a new node to access the network in the standard mode,
the specific implementation steps of the scenario in the embodiment of the present invention are described as follows:
step A1: the user sends a lead code recovery instruction to the coordinator through media such as a mobile phone APP, a webpage and a function button on equipment, so that the coordinator in the existing network is recovered to a standard mode, wherein the standard mode refers to: a standard preamble is used when receiving the message.
Step A2: the coordinator starts to allow network entry.
Step A3: the node starts the network access process of the IEEE802.15.4 standard.
Step A4: the new node obtains the short address through the IEEE802.15.4 standard and joins the current network.
Application scenario two: informing nodes in the current network to work with the modified new preamble.
The specific implementation steps of the scenario in the embodiment of the present invention are described as follows:
step B1: the network structure shown in fig. 2 is constructed, and the current network obtained in the first application scenario of the second embodiment of the present invention is entered.
Step B2: the user sends a preamble modification instruction to the coordinator through a medium such as an instruction input end, and the preamble modification mode includes but is not limited to the modes described in the first embodiment of the present invention, and the final purpose is to tell the node to enable the modified new preamble; after the coordinator and all nodes modify the data in the lead code device into the data in the instruction, the subsequent coordinator and each node transmit and receive messages by using the modified new lead code.
Application scenario three: the nodes in the network operate using the new preamble,
the specific implementation steps of the scenario in the embodiment of the present invention are described as follows:
step C1: after receiving the air interface signal, the 802.15.4 chip performs exclusive or operation on the received signal and the data in the preamble device, and if the received signal is not matched with the data in the preamble device, it indicates that the received signal is not a signal conforming to the IEEE802.15.4 standard or a signal conforming to the IEEE802.15.4 standard and sent to the network (the first wireless network).
Step C2: if the received signal is matched with the data in the lead code device, the received signal can be judged to be a message which is sent to the network and accords with the IEEE802.15.4 standard; in a PTA application scenario, a REQUEST may be triggered to the WiFi network by using a PTA mechanism, so that the WiFi network reduces or suspends its operation to occupy less or even not use the current channel, so that the network occupies more or even monopolizes the current channel to correctly receive a packet.
Step C3: after the message is determined to be received, the data is sent to an MAC layer according to the definition of the standard specification until the application; in the PTA application scenario, the coordinator may use the PTA mechanism to notify the WiFi network to continue working normally.
And an application scene four: the node resumes using the standard preamble (preamble compliant with IEEE802.15.4 standard).
The specific implementation steps of the scenario in the embodiment of the present invention are described as follows:
step D1: operating the node using the self-recovery preamble behavior, thereby causing the node to receive a recovery preamble instruction; for example, the button may be pressed for 8 seconds and released after the node indicator light blinks 4 times.
Step D2: and the node resumes to transmit and receive the message by using the standard lead code.
Third embodiment
In order to further embody the object of the present invention, the first embodiment of the present invention is further illustrated.
In a third embodiment of the present invention, a first wireless network is a wireless local area network supporting IEEE802.15.4 standard, and a transceiver of the first wireless network is disposed in both a coordinator and a node of the first wireless network; the transceiver of the first wireless network is realized by adopting an IEEE802.15.4 wireless transceiver chip, and two lead code devices are added in the IEEE802.15.4 wireless transceiver chip and are realized by adopting registers. The two preamble apparatuses are a preamble apparatus a and a preamble apparatus B, respectively, wherein the preamble apparatus a is configured to store a standard preamble (a preamble complying with IEEE802.15.4 standard), and the preamble apparatus B can store a modified new preamble.
Fig. 3 is a schematic diagram of another networking structure of a wireless network according to an embodiment of the present invention, and as shown in fig. 3, a target sensor 1 and a target sensor n respectively represent two nodes, an 802.15.4 chip is an IEEE802.15.4 wireless transceiver chip for short, and an instruction input end may be implemented based on a mobile phone APP, a web page, or a function button on a device; each target sensor may be a door and window magnet, a smoke sensor, a human body infrared, an intelligent door lock, and the like, which use an 802.15.4 chip, that is, a product operating ZigBee, dottot, Thread, and the like, based on the IEEE802.15.4 protocol.
Several application scenarios are exemplarily described below based on the networking architecture shown in fig. 3.
The application scene one: adding a new node to access the network in the standard mode,
the specific implementation steps of the scenario in the embodiment of the present invention are described as follows:
step E1: the user sends a lead code recovery instruction to the coordinator through media such as a mobile phone APP, a webpage and a function button on equipment, so that the coordinator in the existing network is recovered to a standard mode, wherein the standard mode refers to: a standard preamble is used when receiving the message.
Step E2: the coordinator starts to allow network entry.
Step E3: the node starts the network access process of the IEEE802.15.4 standard.
Step E4: the new node obtains the short address through the IEEE802.15.4 standard and joins the current network.
Application scenario two: informing nodes in the current network to work with the modified new preamble.
The specific implementation steps of the scenario in the embodiment of the present invention are described as follows:
step F1: the network structure shown in fig. 3 is constructed, and the current network obtained in the first application scenario of the third embodiment of the present invention is entered.
Step F2: the user sends a preamble modification instruction to the coordinator through a medium such as an instruction input end, and the preamble modification mode includes but is not limited to the modes described in the first embodiment of the present invention, and the final purpose is to tell the node to enable the modified new preamble; after the coordinator and all nodes modify the data in the lead code device B into the data in the instruction, the follow-up coordinator and each node transmit and receive messages by using the lead codes stored by the lead code device B.
Application scenario three: the nodes in the network operate using the new preamble, and there are various ways to use this logic, such as:
1) when the standard 802.15.4PHY uses the preamble, if the data of the preamble device B is found to be the set invalid data (for example, all 00 data, all 0xFF data, all 0xFE data, etc., which can be randomly agreed in advance, as long as the whole network is unified), the default standard preamble in the preamble device a is used; otherwise if the data in the preamble means B is a valid preamble, the preamble in the preamble means B is used for operation.
2) A flag (e.g. a variable stored in the storage device) may be set to indicate whether the preamble operation in preamble device a or the preamble operation in preamble device B is currently used; illustratively, the change of the variable may be determined according to whether the content of the preamble device B is successfully changed in the second embodiment of the present invention.
The specific implementation steps of the scenario in the embodiment of the present invention are described as follows:
step G1: after receiving the air interface signal, the 802.15.4 chip performs exclusive or operation on the received signal and the data in the preamble device, and if the received signal is not matched with the data in the preamble device, it indicates that the received signal is not a signal conforming to the IEEE802.15.4 standard or a signal conforming to the IEEE802.15.4 standard and sent to the network (the first wireless network).
Step G2: if the received signal is matched with the data in the lead code device, the received signal can be judged to be a message which is sent to the network and accords with the IEEE802.15.4 standard; in a PTA application scenario, a REQUEST may be triggered to the WiFi network by using a PTA mechanism, so that the WiFi network reduces or suspends its operation to occupy less or even not use the current channel, so that the network occupies more or even monopolizes the current channel to correctly receive a packet.
Step G3: after the message is determined to be received, the data is sent to an MAC layer according to the definition of the standard specification until the application; in the PTA application scenario, the coordinator may use the PTA mechanism to notify the WiFi network to continue working normally.
And an application scene four: the node recovers to use the standard preamble (preamble conforming to IEEE802.15.4 standard), and as mentioned above, this recovery logic corresponds to the above usage logic, and there can be various ways, such as:
1) the data in the preamble means B is set as invalid data.
2) Setting a flag (for example, a variable is additionally stored in the storage device) to indicate that the preamble operation in the preamble device a is currently used; illustratively, the change of the variable may be determined according to whether the content of the preamble device B is successfully changed in the second embodiment of the present invention.
The specific implementation steps of the scenario in the embodiment of the present invention are described as follows:
step H1: operating the node using the self-recovery preamble behavior, thereby causing the node to receive a recovery preamble instruction; for example, the button may be pressed for 8 seconds and released after the node indicator light blinks 4 times.
Step H2: and the node resumes to transmit and receive the message by using the standard lead code.
Fourth embodiment
In order to further embody the object of the present invention, the first embodiment of the present invention is further illustrated.
In a fourth embodiment of the present invention, a first wireless network is a wireless local area network supporting IEEE802.15.4 standard, and a transceiver of the first wireless network is disposed in both a coordinator and a node of the first wireless network; the transceiver of the first wireless network is realized by adopting an IEEE802.15.4 wireless transceiver chip, a lead code device is added in the IEEE802.15.4 wireless transceiver chip and used for storing lead codes, and the lead code device is realized by adopting a Flash storage area.
The networking mode and the specific implementation mode in each scenario of the fourth embodiment of the present invention are the same as those in the second embodiment of the present invention, and are not described herein again.
Fifth embodiment
In order to further embody the object of the present invention, the first embodiment of the present invention is further illustrated.
In a fifth embodiment of the present invention, a first wireless network is a wireless local area network supporting IEEE802.15.4 standard, and a transceiver of the first wireless network is disposed in both a coordinator and a node of the first wireless network; the transceiver of the first wireless network is realized by adopting an IEEE802.15.4 wireless transceiver chip, and two lead code devices are added in the IEEE802.15.4 wireless transceiver chip and are realized by adopting a Flash storage area. The two preamble apparatuses are a preamble apparatus a and a preamble apparatus B, respectively, wherein the preamble apparatus a is configured to store a standard preamble (a preamble complying with IEEE802.15.4 standard), and the preamble apparatus B can store a modified new preamble.
The networking mode and the specific implementation mode in each scenario of the fifth embodiment of the present invention are the same as those in the third embodiment of the present invention, and are not described herein again.
Sixth embodiment
On the basis of the signal transmission method provided in the foregoing embodiment of the present invention, a sixth embodiment of the present invention provides a signal transmission device, which can be applied to a transceiver of a first wireless network.
Fig. 4 is a schematic structural diagram of a signal transmission device according to an embodiment of the present invention, and as shown in fig. 4, the signal transmission device 40 may include: a processor 41 and at least one memory 42; wherein the content of the first and second substances,
the at least one memory 42 is configured to store a preamble carrying identification information of the first wireless network;
the processor 41 is configured to, when receiving the preamble of the packet, determine whether the identification information of the wireless network carried in the preamble of the packet is the same as the identification information of the first wireless network, and schedule a transmission process of the packet according to a determination result.
In practical applications, the at least one memory 42 may be a volatile memory (RAM); or a non-volatile memory (non-volatile memory) such as a ROM, a flash memory (flash memory), a Hard Disk Drive (HDD) or a Solid-State Drive (SSD); or a combination of the above types of memories and provides instructions and data to the processor 41.
The Processor 41 may be at least one of an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a Central Processing Unit (CPU), a controller, a microcontroller, and a microprocessor. It will be appreciated that the electronic devices used to implement the processor functions described above may be other devices, and embodiments of the present invention are not limited in particular.
Optionally, the processor 41 is specifically configured to:
if the identification information of the wireless network carried in the lead code of the message is different from the identification information of the first wireless network, discarding the message being received;
and when the identification information of the wireless network carried in the lead code of the message is the same as the identification information of the first wireless network, requesting to suspend the data transmission of the second wireless network, wherein the first wireless network and the second wireless network are different wireless local area networks with the same frequency band.
Optionally, the processor 41 is further configured to notify the second wireless network to continue data transmission after requesting to suspend data transmission of the second wireless network and determining that the message reception is completed.
Optionally, the first wireless network and the second wireless network are both wireless local area networks supporting IEEE802.15.4 standard.
Optionally, the first wireless network or the second wireless network is one of: ZigBee network, Bluetooth network, Thread network, WiFi network.
Optionally, the processor 41 is further configured to receive a modified preamble instruction, where the modified preamble instruction is used to instruct to add the identification information of the first wireless network to the standard preamble; and according to the preamble modification instruction, adding the identification information of the first wireless network in the standard preamble to obtain the preamble carrying the identification information of the first wireless network.
Optionally, the processor 41 is specifically configured to add the identification information of the first wireless network to the reserved bytes of the standard preamble.
Optionally, the at least one memory is a register or a Flash memory.
Optionally, when the first wireless network is a wireless local area network supporting IEEE802.15.4 standard, the identification information of the first wireless network includes at least one of the following: a network identifier of the first wireless network, an EUI-64 of a coordinator of the first wireless network, a portion of the EUI-64 of the coordinator of the first wireless network.
Optionally, the processor 41 is further configured to receive a resume preamble instruction, where the resume preamble instruction is used to instruct to resume the currently stored preamble to the standard preamble; and restoring the lead code required to be used when the message is received into a standard lead code according to the lead code restoring instruction.
Optionally, the at least one memory includes a first memory and a second memory, the first memory is configured to store the preamble carrying the identification information of the first wireless network, and the second memory is configured to store a standard preamble.
Optionally, the processor 41 is specifically configured to change, according to the preamble recovery instruction, data stored in the first memory from a preamble to set invalid data, and use the standard preamble stored in the second memory as a preamble that needs to be used when receiving a packet.
Optionally, the processor 41 is further configured to, when a preamble of a message is received and it is determined that data stored in the first memory is invalid data, schedule a transmission process of the message according to the preamble that needs to be used when the message is received;
correspondingly, the processor 41 is specifically configured to schedule the transmission process of the packet according to the determination result when it is determined that the data stored in the first memory is the preamble carrying the identification information of the first wireless network.
Optionally, the processor 41 is specifically configured to, when receiving a standard preamble usage indication, use the standard preamble stored in the second memory as a preamble that needs to be used when receiving a packet.
Optionally, the processor 41 is further configured to, when a preamble of a message is received and it is determined that the standard preamble is a preamble that needs to be used when the message is received, schedule a transmission process of the message according to the preamble that needs to be used when the message is received;
correspondingly, the processor 41 is specifically configured to schedule the transmission process of the packet according to the determination result when receiving the non-standard preamble use instruction.
Seventh embodiment
A seventh embodiment of the present invention provides a wireless transceiver chip, including any one of the signal transmission devices in the sixth embodiment of the present invention.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (31)
1. A signal transmission method, applied to a transceiver of a first wireless network, the method comprising:
storing the lead code carrying the identification information of the first wireless network;
when the lead code of the message is received, whether the identification information of the wireless network carried in the lead code of the message is the same as the identification information of the first wireless network is judged, and the transmission process of the message is scheduled according to the judgment result.
2. The method according to claim 1, wherein said scheduling the transmission process of the packet according to the determination result comprises:
if the identification information of the wireless network carried in the lead code of the message is different from the identification information of the first wireless network, discarding the message being received;
and when the identification information of the wireless network carried in the lead code of the message is the same as the identification information of the first wireless network, requesting to suspend the data transmission of the second wireless network, wherein the first wireless network and the second wireless network are different wireless local area networks with the same frequency band.
3. The method of claim 2, further comprising:
and after the data transmission of the second wireless network is requested to be suspended and the message is determined to be received completely, the second wireless network is informed to continue the data transmission.
4. The method of claim 2, wherein the first wireless network and the second wireless network are both wireless local area networks supporting Institute of Electrical and Electronics Engineers (IEEE) 802.15.4 standards.
5. The method of claim 4, wherein the first wireless network or the second wireless network is one of: ZigBee network, Bluetooth network, household Internet of things communication protocol technology Thread network, and wireless fidelity WiFi network.
6. The method of claim 1, further comprising:
before storing a lead code carrying identification information of a first wireless network, receiving a lead code modification instruction, wherein the lead code modification instruction is used for indicating that the identification information of the first wireless network is added in a standard lead code;
and according to the preamble modification instruction, adding the identification information of the first wireless network in the standard preamble to obtain the preamble carrying the identification information of the first wireless network.
7. The method of claim 6, wherein the adding the identification information of the first wireless network in the standard preamble comprises: adding identification information of the first wireless network in reserved bytes of the standard preamble.
8. The method of claim 1, 6 or 7, wherein the storing the preamble carrying the identification information of the first wireless network comprises:
and storing the lead code carrying the identification information of the first wireless network by using a register or a Flash memory.
9. The method of claim 1, 6 or 7, wherein when the first wireless network is a wireless local area network supporting IEEE802.15.4 standard, the identification information of the first wireless network comprises at least one of the following: a network identifier of the first wireless network, a 64-bit extended unique identifier EUI-64 of a coordinator of the first wireless network, a portion of EUI-64 of a coordinator of the first wireless network.
10. The method of claim 1, further comprising:
receiving a resume preamble instruction for instructing a resumption of a currently stored preamble to a standard preamble;
and restoring the lead code required to be used when the message is received into a standard lead code according to the lead code restoring instruction.
11. The method of claim 10, wherein the storing the preamble carrying the identification information of the first wireless network comprises: storing the lead code carrying the identification information of the first wireless network by using a first memory;
accordingly, the method further comprises: the standard preamble is stored with a second memory.
12. The method according to claim 11, wherein the recovering, according to the preamble recovering instruction, the preamble that needs to be used when receiving the packet to be a standard preamble comprises:
and changing the data stored in the first memory from the lead code into preset invalid data according to the lead code recovery instruction, and taking the standard lead code stored in the second memory as a lead code required to be used when a message is received.
13. The method of claim 12, further comprising:
when a lead code of a message is received and data stored in the first memory is determined to be invalid data, scheduling the transmission process of the message according to the lead code required to be used when the message is received;
correspondingly, the scheduling the transmission process of the message according to the judgment result includes:
and when the data stored in the first memory is determined to be the lead code carrying the identification information of the first wireless network, scheduling the transmission process of the message according to the judgment result.
14. The method of claim 11, wherein the recovering the preamble required to be used when receiving the packet to be the standard preamble comprises:
and when the standard lead code use instruction is received, taking the standard lead code stored in the second memory as a lead code required to be used when the message is received.
15. The method of claim 14, further comprising:
when a lead code of a message is received and the standard lead code is determined to be used as the lead code required to be used when the message is received, scheduling the transmission process of the message according to the lead code required to be used when the message is received;
correspondingly, the scheduling the transmission process of the message according to the judgment result includes:
and when receiving the use instruction of the non-standard lead code, scheduling the transmission process of the message according to the judgment result.
16. A signal transmission apparatus, wherein the apparatus is applied to a transceiver of a first wireless network, the apparatus comprises a processor and at least one memory; wherein the content of the first and second substances,
the at least one memory is used for storing the lead code carrying the identification information of the first wireless network;
the processor is configured to determine whether the identification information of the wireless network carried in the preamble of the message is the same as the identification information of the first wireless network when the preamble of the message is received, and schedule a transmission process of the message according to a determination result.
17. The apparatus of claim 16, wherein the processor is specifically configured to:
if the identification information of the wireless network carried in the lead code of the message is different from the identification information of the first wireless network, discarding the message being received;
and when the identification information of the wireless network carried in the lead code of the message is the same as the identification information of the first wireless network, requesting to suspend the data transmission of the second wireless network, wherein the first wireless network and the second wireless network are different wireless local area networks with the same frequency band.
18. The apparatus of claim 17, wherein the processor is further configured to notify the second wireless network to continue data transmission after the suspension of data transmission of the second wireless network is requested and it is determined that the message is received.
19. The apparatus of claim 17, wherein the first wireless network and the second wireless network are both wireless local area networks supporting Institute of Electrical and Electronics Engineers (IEEE) 802.15.4 standards.
20. The apparatus of claim 19, wherein the first wireless network or the second wireless network is one of: ZigBee network, Bluetooth network, household Internet of things communication protocol technology Thread network, and wireless fidelity WiFi network.
21. The apparatus of claim 16, wherein the processor is further configured to receive a modified preamble instruction, wherein the modified preamble instruction is configured to instruct to add identification information of a first radio network to a standard preamble; and according to the preamble modification instruction, adding the identification information of the first wireless network in the standard preamble to obtain the preamble carrying the identification information of the first wireless network.
22. The apparatus of claim 21, wherein the processor is configured to add the identification information of the first wireless network in reserved bytes of the standard preamble.
23. The apparatus of claim 16, 21 or 22, wherein the at least one memory is a register or a Flash memory.
24. The apparatus of claim 16, 21 or 22, wherein when the first wireless network is a wireless local area network supporting ieee802.15.4 standard, the identification information of the first wireless network comprises at least one of: a network identifier of the first wireless network, a 64-bit extended unique identifier EUI-64 of a coordinator of the first wireless network, a portion of EUI-64 of a coordinator of the first wireless network.
25. The apparatus of claim 16, wherein the processor is further configured to receive a resume preamble instruction, wherein the resume preamble instruction is configured to instruct to resume a currently stored preamble to a standard preamble; and restoring the lead code required to be used when the message is received into a standard lead code according to the lead code restoring instruction.
26. The apparatus of claim 25, wherein the at least one memory comprises a first memory and a second memory, the first memory is configured to store the preamble carrying identification information of the first wireless network, and the second memory is configured to store a standard preamble.
27. The apparatus of claim 26, wherein the processor is specifically configured to change the data stored in the first memory from a preamble to the set invalid data according to the preamble recovery instruction, and use the standard preamble stored in the second memory as a preamble to be used when receiving the message.
28. The apparatus of claim 27, wherein the processor is further configured to schedule a transmission process of the packet according to a preamble required to be used when receiving the packet when receiving the preamble of the packet and determining that the data stored in the first memory is invalid data;
correspondingly, the processor is specifically configured to schedule the transmission process of the packet according to the determination result when it is determined that the data stored in the first memory is the preamble carrying the identification information of the first wireless network.
29. The apparatus of claim 26, wherein the processor is specifically configured to, when receiving a standard preamble usage indication, use the standard preamble stored in the second memory as a preamble to be used when receiving a packet.
30. The apparatus of claim 29, wherein the processor is further configured to schedule a transmission process of the packet according to a preamble required to be used when receiving the packet when receiving the preamble of the packet and determining the standard preamble as the preamble required to be used when receiving the packet;
correspondingly, the processor is specifically configured to schedule the transmission process of the packet according to the determination result when receiving the non-standard preamble use instruction.
31. A wireless transceiver chip comprising the signal transmission device according to any one of claims 16 to 30.
Priority Applications (2)
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|---|---|---|---|
| CN201811558014.XA CN111343725A (en) | 2018-12-19 | 2018-12-19 | Signal transmission method and device and wireless transceiver chip |
| PCT/CN2019/093372 WO2020124982A1 (en) | 2018-12-19 | 2019-06-27 | Signal transmission method and apparatus, and wireless transceiving chip |
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| CN201811558014.XA CN111343725A (en) | 2018-12-19 | 2018-12-19 | Signal transmission method and device and wireless transceiver chip |
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